Numerical simulation of airflow behaviour and nozzle

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  • Numerical simulation of airflow behaviour and nozzle ...

    Numerical simulation of airflow behaviour and nozzle geometry on commingling for thermoplastic composites. ... To better understand and ease of explanation of airflow behaviour, the complete nozzle domain is segmented into two zones, namely the primary zone (AA-CC) and the secondary zone (CC-DD). The function of the primary zone is to open and ...

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  • Numerical simulation of airflow behaviour and nozzle ...

    Nozzle CONF I and II work on backwards airflow principles among these configures, while CONF III functions with forwarding airflow. Commingling process efficiency of nozzle designs is analysed in terms of vorticity magnitude, turbulence kinetic energy, turbulence intensity and radial velocity values obtained from the simulation study.

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  • Numerical simulation of airflow behaviour and nozzle ...

    Request PDF | Numerical simulation of airflow behaviour and nozzle geometry on commingling for thermoplastic composites | The current study highlights the superiority of nozzles with forwarding ...

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  • Numerical Simulation of Air Flow in the Nozzle of an Air ...

    Numerical simulation is conducted on 3D flow in rotation cup of rotor spinning with Fluent and the simulation results reveal the airflow characteristics as: the vortex is generated in rotation cup ...

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  • Numerical simulation of airflow characteristics in the ...

    2018-8-15 · Numerical simulation of airflow characteristics in the spinning zone at starting time of air-jet spinning machine ... VK, Patnaik, A Airflow simulation in nozzle for hairiness reduction of ring spun yarns. Part I: Influence of airflow direction, nozzle ... The effect of different nozzle configurations on airflow behaviour and yarn quality.

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  • Numerical Simulation of Erosion and Flow Behaviour in Nozzle

    We used CFD method to numerical simulation of solid-liquid two-phase flow in nozzle flow inside the nozzle, simplified structure, used the RNGk-ε model for numerical simulation. Through numerical simulation, we get the velocity distribution and the erosion distribution, provide guidance for further improvement and application in structure engineering

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  • The Effect of Different Nozzle Configurations on Airflow ...

    In numerical simulation, ANSYS 12.1 package program and Fluid Flow (CFX) analysis method was used. As distinct from the literature, Shear Stress Turbulent (SST) model is preferred. And also air pressure at the nozzle inlet was measured by electronic mass flow meter and these values were used for the simulation of the airflow.

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  • Numerical simulation of the airflow over and heat transfer ...

    A numerical model and technique are described to simulate the turbulent fluid flow over and heat transfer through a model of vehicle windshield defrosting and demisting systems. The simplified geometry and the dimensions of the numerical model are representative of vehicle system with accurate locations of the nozzles and outlet vents, including cabin features such as seating and the rear ...

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  • Simulation of Airflow Motion in Jet Nozzle with Different ...

    Jet nozzle with tangentially injected airflow has been applying into spinning technology due to the tangential force produced by swirling airflow. In order to understand the airflow motion trajectory in jet nozzle, modify the nozzle structure and dimension, FLUENT software program is used. Some parameters which are closely related the airflow motion profiles are studied, such as the diameter ...

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  • Numerical Simulation of the Airflow Over a Military ...

    2020-2-17 · The aim of the study presented herein is to numerically predict the behaviour of the airflow around a flying military aircraft with an active intake in which the airflow may enter and travel all the way up to the Aerodynamic Interface Plane (AIP, the analytical interface between the inlet and engine).

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  • Numerical simulation of airflow characteristics in the ...

    2018-8-15 · Numerical simulation of airflow characteristics in the spinning zone at starting time of air-jet spinning machine ... VK, Patnaik, A Airflow simulation in nozzle for hairiness reduction of ring spun yarns. Part I: Influence of airflow direction, nozzle ... The effect of different nozzle configurations on airflow behaviour and yarn quality.

    Get Price
  • The Effect of Different Nozzle Configurations on Airflow ...

    In numerical simulation, ANSYS 12.1 package program and Fluid Flow (CFX) analysis method was used. As distinct from the literature, Shear Stress Turbulent (SST) model is preferred. And also air pressure at the nozzle inlet was measured by electronic mass flow meter and these values were used for the simulation of the airflow.

    Get Price
  • Numerical Simulation and Analysis for the Flow Field of ...

    Due to the complicated structure and the high speed turbulence, it is difficult to measure and analyze the flow field characteristics of the main nozzle by experimental methods, naturally, some software such as FLUENT become a powerful tool to perform the numerical simulation for flow field of the main nozzle of an air-jet loom. The distribution of the airflow velocity and static pressure ...

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  • Numerical simulation of the airflow field in vortex ...

    2018-4-13 · The numerical simulation results show that the turbulence phenomenon in the normal spinning process is much more obvious than that in the initial spinning process; the air streamlines move orderly in the initial spinning process, which will produce a strong suction force that will be conducive to drawing the fiber bundle into the nozzle ...

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  • Numerical simulation of airflow in the human nose.

    Numerical simulation of airflow in the human nose. Weinhold I (1), Mlynski G. (1)Department of Otorhinolaryngology and Head and Neck Surgery, Ernst Moritz Arndt University of Greifswald, Walther-Rathenau-Strasse 43-45, 17487 Greifswald, Germany. Unobstructed air passageways as well as sufficient contact of the air stream with the mucous ...

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  • Numerical simulation of the airflow over and heat transfer ...

    A numerical model and technique are described to simulate the turbulent fluid flow over and heat transfer through a model of vehicle windshield defrosting and demisting systems. The simplified geometry and the dimensions of the numerical model are representative of vehicle system with accurate locations of the nozzles and outlet vents, including cabin features such as seating and the rear ...

    Get Price
  • Experiment and numerical simulation of two-phase flow

    2020-1-15 · comparing the simulation results with the experimental data. The experiment shows that the airflow speed has a great influence on the flow of the water. The submerged depth of the nozzle has a relatively smaller influence on the penetration depth and the surface fluctuation height in the liquid phase. When the nozzle is at a downward angle of 15°,

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  • Numerical simulation analysis of influence of jet orifice ...

    2018-6-3 · more reasonable nozzle structure.12 However, the mechanism of the effect of jet orifice structure parameters in nozzles on the properties of yarn suction guns is still not clarified. In this work, computational fluid dynamics software CFX 12.1 was employed to conduct numerical simulation for the flow field inside yarn suction guns with

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  • Three-dimensional numerical simulation of flow and splash ...

    2021-6-3 · The change of bubbles and the position of the tuyere in an oxygen coal combustion melting and separating furnace affect the flow and splash behavior of the molten pool. To analyze this problem further, a three-dimensional numerical simulation method was used to explore the behavior and change of the flow field inside the molten pool during double-row tuyere injection. In addition, the ...

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  • Analysis of the factors influencing the airflow behavior ...

    2020-9-21 · A validated CFD model is employed to predict the airflow behavior in an impinging jet ventilation (IJV) room with cool, isothermal or warm jets. By using the numerical results, the influences of jet discharge height, supply grille shape and room height on the jet flow behavior as well as the draught discomfort are analyzed for IJV operating in heating scenarios. The results indicate that the ...

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  • The Numerical Simulation of the Airflow Distribution and ...

    For example, Figure 6B,C, the airflow line drawing from the numerical simulation results can clearly show that the airflow distribution is reasonable. The cold airflow from the floor grid comes into the cabinet to take away the heat from severs at rack, then back from the upper space of the room, and finally back to the air conditioning unit.

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  • Numerical simulation of airflow in the human nose.

    Numerical simulation of airflow in the human nose. Weinhold I (1), Mlynski G. (1)Department of Otorhinolaryngology and Head and Neck Surgery, Ernst Moritz Arndt University of Greifswald, Walther-Rathenau-Strasse 43-45, 17487 Greifswald, Germany. Unobstructed air passageways as well as sufficient contact of the air stream with the mucous ...

    Get Price
  • Numerical Simulation and Analysis for the Flow Field of ...

    Due to the complicated structure and the high speed turbulence, it is difficult to measure and analyze the flow field characteristics of the main nozzle by experimental methods, naturally, some software such as FLUENT become a powerful tool to perform the numerical simulation for flow field of the main nozzle of an air-jet loom. The distribution of the airflow velocity and static pressure ...

    Get Price
  • Numerical simulation analysis of influence of jet orifice ...

    2018-6-3 · more reasonable nozzle structure.12 However, the mechanism of the effect of jet orifice structure parameters in nozzles on the properties of yarn suction guns is still not clarified. In this work, computational fluid dynamics software CFX 12.1 was employed to conduct numerical simulation for the flow field inside yarn suction guns with

    Get Price
  • Numerical Simulation of Airflow and Temperature Fields in ...

    It is shown that body heat has much influence on airflow and temperature field while solar radiation has little influence on airflow field, but much influence on temperature field. According to the standard QCn29008.9-1991, an experiment is carried out in an air-conditioned vehicle, which verifies the correctness of the numerical simulation.

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  • Numerical simulation of three-dimensional airflow in a ...

    The numerical simulation can provide insights on airflow studies and some guidelines for future prototyping and experiments to further improve the new design. In order to regulate turbulence strength and determine airflow characteristics in a new dual-feed rotor spinning unit, …

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  • NUMERICAL SIMULATION OF AIRFLOW AROUND VEHICLE

    This article carries out the numerical simulation of airflow over three dimensional car models using ANSYS Fluent software. The calculations have been performed by using realizable k-e turbulence model. The external airflow field of the simplified BMV M6 model with or without a wing is simulated. Several aerodynamic characteristics such as pressure distribution, velocity contours, velocity ...

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  • Numerical simulation of the influence of fuel temperature ...

    2019-8-16 · The spray configuration of numerical simulation and test measurement is similar at the same injection time. The farther away from the nozzle outlet, the more dispersed is the fuel spray, and the axial and radial spray development trend of numerical simulation is consistent with that of test results.

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  • Numerical simulation of the relationship between ...

    In order to study the relationship between an underwater shock wave and jet thrust oscillation, a simulation model of underwater jet is established. As per a numerical calculation based on the SST (Shear Stress Transport), and VOF (Volume of Fluid) models, the flow speed of jet gas has been changed with the pressure ratio. When the jet speed becomes supersonic, its corresponding shock ...

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  • Study the effect of pressure on airflow field in vortex ...

    The numerical simulation results show that the velocity vector and the static pressure increase with the nozzle pressure, the principle of the swirling airflow is decided by the pressure distribution, a large negative pressure with appropriate axial and tangential velocity within the nozzle is conducive to the generation of the fibers with open ...

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  • Processes

    In this work, an atomizer with a de Laval-type nozzle is designed and studied by commercial computational fluid dynamics (CFD) software, and the secondary breakup process during atomization is simulated by two-way coupling and the discrete particle model (DPM) using the Euler-Lagrange method. The simulation result demonstrates that the gas flow patterns greatly change with the introduction of ...

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  • Numerical simulation and optimum design on airflow ...

    2013-2-1 · Numerical simulation and optimum design on airflow distribution chamber of air-impingement jet dryer ... which led to the nozzle exit velocity first decreases and then increases along the height direction. The airflow velocity of round nozzles ranged from 11.9 to 17.7 m/s under the design condition and the minimum value was got in the eighth ...

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  • INTERIOR AIRFLOW SIMULATION IN RAILWAY ROLLING

    2012-6-26 · Numerical simulation by CFD, validation, air conditioning, interior air flow, thermal comfort, railway rolling stock ... airflow to be inhomogeneous and turbulent along the nozzle (but was taken constant in the simulation) a good quantitative prediction of local flow fields was difficult, although. the global behaviour of the flow field was ...

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  • Experimental and Numerical Study of Flow Behavior in ...

    So the numerical simulation of the electromagnetic valve of the nozzle had been done in the paper to study the dynamic changing character of pressure and flow rate. The result showed that one of the reasons that induced the difference between the experimental result and calculation value was that the sudden decrease of the flow rate to the zero ...

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  • Numerical Investigation of Nozzle-Geometry Variations and ...

    2018-4-3 · In the present work numerical simulations were carried out investigating the effect of fuel type, nozzle-geometry variations and back-pressure changes on high-pressure gas injections under application-relevant conditions. Methane, hydrogen and nitrogen with …

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  • Numerical simulation of convective airflow in an empty ...

    Numerical simulation of airflow inside an empty room has been carried out for a forced convection, a natural convection and a mixed convection respectively, by using a computational fluid dynamics approach of solving the Reynolds-averaged Navier-Stokes fluid equations. Two-dimensional model was studied at first; focusing on the grid refinement ...

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  • Chapter 6 Application of numerical simulation to ...

    2001-8-17 · CHAPTER 6 APPLICATION OF NUMERICAL SIMULATION TO VENTILATED FLOW PROBLEMS 102 6.1 Introduction Airflow in ventilated enclosures can be divided into the following groups: mixing type where the flow is driven by forced convection, and natural convection where the main driving force is the buoyancy.

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  • Numerical Simulation Research on Airflow Field in Right ...

    Numerical Simulation Research on Airflow Field in Right-Angle Bending Tunnel ... <正> When airflow passes the right-angle bending tunnel, because of rapid change of airflow direction and effect of inertial centrifugal force, the airflow disengages from the inside wall and leans to outside wall, which increases the velocity of the outside wall ...

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  • CFD NUMERICAL SIMULATION OF TEMPERATURE AND

    2020-8-7 · Keywords: CFD, numerical simulation, grid independence, airflow velocity, temperature distribution ABSTRACT Grid independence verification was implemented to improve the reliability of CFD numerical simulation in pigsty. The effects of four different grid numbers on airflow and temperature simulation of 0.4m, 1.0m and 1.6m heights were compared.

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  • Numerical simulation of the relationship between ...

    In order to study the relationship between an underwater shock wave and jet thrust oscillation, a simulation model of underwater jet is established. As per a numerical calculation based on the SST (Shear Stress Transport), and VOF (Volume of Fluid) models, the flow speed of jet gas has been changed with the pressure ratio. When the jet speed becomes supersonic, its corresponding shock ...

    Get Price
  • NIOSHTIC-2 Publications Search - 20029896 - Numerical ...

    These adjustments allow for the simulation of disease transmission using less than 1/100 the computing hardware resources required for an equivalent LES of airflow and particle transport. This paper is an elaboration on the numerical study of the transport of airborne pathogens in an aircraft cabin.

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  • NUMERICAL SIMULATION OF THE AIRFLOW AND

    2021-8-16 · The thermal behavior of the inside air of a closed Venlo glasshouse without plants was analysed under semi-arid climate conditions. The aim of the study was to investigate to what extent the characteristics of the greenhouse design and outside climatic conditions influence airflow and temperature patterns inside the greenhouse.

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  • NUMERICAL SIMULATION OF AIRFLOW DISTRIBUTION IN

    2021-7-29 · From the numerical results, design deficits could be indicated. Pros and cons of the different air duct arrangements were discussed. It could be shown, that the horizontal arrangement leads to a more homogeneous airflow distribution than the diagonal arrangement.

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  • Numerical Simulation of Airflow and Particle Collection by ...

    2018-6-13 · Numerical Simulation of Airflow and Particle Collection by Vegetative Barriers Li Guo Department of Biological and Agricultural Engineering, Kansas State University, Manhattan, KS 66506-5205 U.S.A. & Ronaldo G. Maghirang Department of Biological and Agricultural Engineering, Kansas State University, Manhattan, KS 66506-5205 U.S.A ...

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  • Numerical Simulation of Airflow, Particle Deposition and ...

    2007-8-7 · Simulation results are in good agreement with experimental measurements, assuring that computational fluid-particle dynamics (CFPD) is an effective and efficient tool to predict both toxic and therapeutic aerosol dynamics in the nasal cavities. Both nano- and micro- particle deposition efficiencies are influenced by particle size and airflow rate.

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  • Compressible Flow Through a Converging Diverging (CD ...

    In this simulation example, we will solve the compressible flow through a 2D axisymmetric CD nozzle and analyze the flow behavior at two different flow conditions. Objectives. In this simulation example, you will learn how to simulate a compressible airflow through a converging–diverging nozzle.

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  • Numerical Simulation of Airflow Field and Structure ...

    When the mechanical drive is changed into the electric transmission,the cooling system of the engine compartment should be altered to meet the new requirement for the increase in equipment such as electric apparatus.In order to predicte and analyze the rationality of cooling system in the virtual engine compartment,the numerical simulation of airflow fields in the engine compartment by using ...

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  • Numerical Investigation of Supersonic Nozzle Flow ...

    2012-5-2 · Numerical simulations and physical analysis of an overexpanded reactive gas flow in a planar nozzle Combustion and Flame, Vol. 159, No. 9 Experimental Testing and Numerical Simulations of Shrouded Plug-Nozzle Flowfields

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  • Numerical investigation of separated nozzle flows

    2012-5-17 · Numerical simulation of transient flows in a rocket propulsion nozzle International Journal of Heat and Fluid Flow, Vol. 31, No. 3 Numerical investigation of transient side-loads in the start-up process of a rocket nozzle

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  • Comparison of Numerical Simulations to Experiments for ...

    2013-11-11 · The development of jet nebulizers for medical purposes is an important challenge of aerosol therapy. The performance of a nebulizer is characterized by its output rate of droplets with a diameter under 5 µm. However the optimization of this parameter through experiments has reached a plateau. The purpose of this study is to design a numerical model simulating the nebulization process and to ...

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  • CiteSeerX — NUMERICAL SIMULATION OF AIRFLOW OVER

    CiteSeerX - Document Details (Isaac Councill, Lee Giles, Pradeep Teregowda): Numerical simulation can provide a valuable tool in evaluating the characteristics of possible sites for new telescopes. This technique can provide accurate information about topographically induced atmospheric disturbances and turbulent boundary layers occurring in the high Reynolds number airflows over such sites.

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  • Numerical Simulations of Inspiratory Airflow in Healthy ...

    2019-9-1 · Airflow simulation was performed in the model of upper healthy G3-G7 airways with equivalent inlet flow rate of 662.4 mL/s at the trachea and the same boundary conditions. The axial velocities were compared along a diameter in mid-plane circular cross-section of the fourth generation at A (Figure 1).

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  • The Numerical Simulation of Airflow and Dispersion in ...

    A three-dimensional, nonhydrostatic numerical code using the two-equation turbulence closure was developed to model the atmospheric transport and diffusion of pollutants over buildings and a three-dimensional hill. The standard engineering two-equation, first-order turbulence closure was modified to account for surface layer effects and the reduced production of dissipation in the region above ...

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  • Numerical Simulation of the Flow and Heat Transfer Induced ...

    2021-5-26 · Numerical Simulation of the Flow and Heat Transfer Induced by Corona Discharge Coupling With Electrostatically Forced Vibration ... Dynamic Behavior of an Electrostatic MEMS Resonator With Repulsive Actuation,” ... Patterns of Airflow in Circular Tubes Caused by a Corona Jet With Concentric and Eccentric Wire Electrodes,”

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  • Numerical investigation on high-pressure convergent nozzle ...

    Numerical investigation on high-pressure convergent nozzle by comparative and statistical analysis method 【Author】 B Yuan 1,2,Y Kang 1,2,X F Yang 1,2,Z L Fang 1,2 and D Li 1,2 1 School of Power and Mechanical Engineering,Wuhan University,No.8 Donghu South Road,Wuhan,430072,China 2 Key Laboratory of Hubei Province For Water Jet Theory&New ...

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  • Numerical Analysis of Airflow Fields from New Melt-Blowing ...

    2020-5-28 · The melt-blowing process uses high-speed and high-temperature airflow from the die head to draw polymer melt into micron-sized fibers. In this work, to reduce the diameter of the melt-blowing fibers, three new slot dies have been designed based on the common slot die. With computational fluid dynamics technology, the two-dimensional flow fields from these new types of slot dies were ...

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  • An overview of experiments and numerical simulations on ...

    Mutuku, J. K., Hou, W. C., & Chen, W. H. (2020). An overview of experiments and numerical simulations on airflow and aerosols deposition in human airways and the role of bioaerosol motion in covid-19 transmission. Aerosol and Air Quality Research, 20(6), 1172-1196.

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  • Numerical simulation on electrostatic alignment control of ...

    2020-5-15 · The fibril orientation distribution function of CNFs flowing through an alternating electric field has been clarified by a numerical simulation. The flow channel consists of a straight channel with electrodes placed downstream, followed by a nozzle. The principal results obtained are as follows:

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  • Modelling and Simulation of a Supersonic Convergent ...

    2020-2-15 · The major importance of a CD nozzle in the industry is to improve the kinetic energy of the flow medium at an expense of an internal energy and the pressure. Literature: The convergent-divergent nozzle is designed for attaining speeds that are greater than speed of sound. The design of this nozzle came from the area-velocity relation:

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  • Comparison of airflow characteristics after Draf Ⅲ frontal ...

    2019-3-6 · Draf Ⅲ frontal sinus surgery is confirmed as an effective surgical treatment for refractory sinusitis and frontal sinus tumors, etc. Although it has been reported to improve symptoms and reduce the recurrence rate of polyps significantly, the study of airflow characteristics in frontal sinus after Draf Ⅲ is still rare, especially compared with normal person.

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  • Numerical simulation of airflow behaviour and nozzle ...

    Numerical simulation of airflow behaviour and nozzle geometry on commingling for thermoplastic composites. ... To better understand and ease of explanation of airflow behaviour, the complete nozzle domain is segmented into two zones, namely the primary zone (AA-CC) and the secondary zone (CC-DD). The function of the primary zone is to open and ...

    Get Price
  • Numerical simulation of airflow behaviour and nozzle ...

    Nozzle CONF I and II work on backwards airflow principles among these configures, while CONF III functions with forwarding airflow. Commingling process efficiency of nozzle designs is analysed in terms of vorticity magnitude, turbulence kinetic energy, turbulence intensity and radial velocity values obtained from the simulation study.

    Get Price
  • Numerical simulation of airflow behaviour and nozzle ...

    Request PDF | Numerical simulation of airflow behaviour and nozzle geometry on commingling for thermoplastic composites | The current study highlights the superiority of nozzles with forwarding ...

    Get Price
  • Numerical Simulation of Air Flow in the Nozzle of an Air ...

    Numerical simulation is conducted on 3D flow in rotation cup of rotor spinning with Fluent and the simulation results reveal the airflow characteristics as: the vortex is generated in rotation cup ...

    Get Price
  • Numerical simulation of airflow characteristics in the ...

    2018-8-15 · Numerical simulation of airflow characteristics in the spinning zone at starting time of air-jet spinning machine ... VK, Patnaik, A Airflow simulation in nozzle for hairiness reduction of ring spun yarns. Part I: Influence of airflow direction, nozzle ... The effect of different nozzle configurations on airflow behaviour and yarn quality.

    Get Price
  • The Effect of Different Nozzle Configurations on Airflow ...

    In numerical simulation, ANSYS 12.1 package program and Fluid Flow (CFX) analysis method was used. As distinct from the literature, Shear Stress Turbulent (SST) model is preferred. And also air pressure at the nozzle inlet was measured by electronic mass flow meter and these values were used for the simulation of the airflow.

    Get Price
  • Three-dimensional numerical simulation of air exhausted ...

    Three-dimensional numerical simulation of air exhausted from submerged nozzles J T Liu, S J Qin, T C Miao and D Z Wu1 Institute of Process Equipment, Zhejiang University, Road 38, Hangzhou, Zhejiang,

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  • Numerical and experimental study of the influence of ...

    2018-12-1 · Airflow behavior inside the nozzle was modeled by a fluid flow analysis program, Fluent 6.1 was used to solve the 3D airflow field inside the nozzles. The profile of airflow was simulated using a CFD model and drag forces acting on hair were computed. They found that the hairiness reduction was affected by the air drag forces level acting on ...

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  • Numerical Simulation of the Airflow over and Heat

    Numerical Simulation of the Airflow over and Heat Transfer through a Vehicle Windshield Defrosting and Demisting system A Aroussi*, A Hassan *, B Clayton *, School of Mechanical, Materials ...

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  • Numerical simulation of the internal flow field of a new ...

    2015-2-6 · Xu et al. 10 combined the numerical simulation of the airflow velocity and the density with the experimental test of the drag force to obtain the friction coefficients of different weft yarns. Dong et al. 11 arrived at the conclusion that the numerical simulation results for the flow field obtained by Fluent software are in good agreement with ...

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  • Numerical investigation of airflow in an idealised human ...

    3. Results and discussion. The boundary conditions play an important role in the flow simulation. In the experiments, a nozzle was a xed to the inlet of the model to decrease inlet losses and dampen out any external instabilities (Johnstone 2003).The use of a nozzle ensures virtually uniform inlet conditions at all flow rates, producing nearly plug flow (i.e. “top hat”) inlet velocity ...

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  • INTERIOR AIRFLOW SIMULATION IN RAILWAY ROLLING

    2012-6-26 · Numerical simulation by CFD, validation, air conditioning, interior air flow, thermal comfort, railway rolling stock ... airflow to be inhomogeneous and turbulent along the nozzle (but was taken constant in the simulation) a good quantitative prediction of local flow fields was difficult, although. the global behaviour of the flow field was ...

    Get Price
  • Numerical simulation and analysis of multi-scale ...

    Simulation set-up. The created numerical domain is depicted in figure 7, which includes the domain inlet and outlet boundaries, as well as the pressure probe location and the small cylinder in the converging–diverging section of the channel. To avoid the influence of the inlet and outlet boundaries on the flow field in the converging ...

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  • Simplified Numerical Models for Complex Air Supply

    2008-3-4 · CFD simulation. Nevertheless, this investigation uses both methods to examine their performance in room airflow prediction. For room airflow simulation, the present investigation used the CFD technique to solve a set of partial differential equations for the conservation of mass, momentum, energy, and species concentrations.

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  • Numerical Simulation of an Enclosed Laminar Jet Diffusion ...

    2001-5-1 · Numerical Simulation of an Enclosed Laminar Jet Diffusion Flame in Microgravity Environment: Comparison with ELF Data Enclosed diffusion flames are commonly found in practical combustion systems, such as the power-plant combustor, gas turbine combustor, and jet engine after-burner. In these systems, fuel is injected into a duct with a co-flowing or cross-flowing air stream.

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  • Article: The numerical simulation of fuel-lean counterflow ...

    2010-8-4 · Abstract: Numerical simulations of counterflow premixed flames with flame curvature were carried out. To impart a flame curvature, the premixed gas was ejected from the nozzle with axial velocities varying in the transverse direction. The influence of the flame curvature, unsteady behaviour and flame structure on local extinction was investigated.

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  • Two-step numerical simulation of the heat transfer from a ...

    2019-12-16 · Impinging jets have been widely studied, and the addition of swirl has been found to be beneficial to heat transfer. As there is no literature on Reynolds-averaged Navier Stokes equations (RANS) nor experimental data of swirling jet flows generated by a rotating pipe, the purpose of this study is to fill such gap by providing results on the performance of this type of design.,As the flow has ...

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  • A Method of Test to Obtain Diffuser Data for CFD

    2008-3-4 · (IEA 1993). The diffuser consists of 84 small round nozzles arranged in four rows in an area of 28 in. × 6.7 in. (0.71 m × 0.17 m), as shown in Figure 1(a). Each nozzle has a diameter of ½ in. (11.8 mm), and the total airflow area for all nozzles is 0.1 ft2 (0.0092 m2). The flow direction of each nozzle …

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  • PAPER OPEN ACCESS Design and Flow Simulation of ...

    2020-4-8 · simulation are: The initial wind velocity is set as 3 m/s; The inlet pressure is assumed as atmosphere pressure (0 kPa); Realizable k-epsilon model is used for the simulation and Single Reference Frames (SRF) model is used; and the airflow is assumed as incompressible steady state flow. Density based flow solver is used.

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  • CFD study on the behaviour and turbulence of the airflow ...

    Land scarcity in relation to the swift urbanisation causes vertical development of buildings and infrastructures. The increasing importance of the main vertical transport - elevator, urges the elevator aerodynamics study to evaluate its acoustic, ride comfort, aerodynamics performance, and airflow effect. They were carried out experimentally or(and) via modeling and simulation.

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