The influence of nozzle geometry on the air-jet texture performance Durable

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  • (PDF) The effect of nozzle geometry on the flow ...

    the nozzle or changes in air flow patterns in the ... factor affecting nozzle performance is the manu- ... A number of papers have studied the influence of nozzle geometry on water jet …

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  • Effect of nozzle geometry on the performance of laser ...

    2016-4-13 · The performance of “ablation mode” laser propulsion thrusters can be improved obviously by nozzle constraint. The nozzle geometry of “ablation mode” laser propulsion thrusters has been studied experimentally with CO 2 lasers. Experimental results indicate that the propulsion performance of cylindrical nozzle thrusters is better than expansionary nozzle thrusters at the same lengths.

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  • Effect of nozzle geometry on critical-subcritical flow ...

    2019-2-1 · Nozzle geometry does have a significant impact of nozzle performance. Effect of single-phase air flow through a nozzle revealed the effect of different nozzle parameters on nozzle performance. A lower diverging angle and no elongated throat gave the best critical pressure ratio and a …

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  • Research on geometrical parameters effect of fan nozzle ...

    2018-10-19 · In order to determine the significance and importance order of the jet performance caused by fan nozzle's geometric parameters of aero-engine online cleaning equipment, the orthogonal experiment method, standard k–ɛ turbulence model and volume of fluid (VOF) two-phase flow algorithm are used to research the jet of fan nozzle. The sensitivity of nozzle contraction angle, nozzle area ratio ...

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  • Effect of Micro-Hole Nozzle on Diesel Spray and Combustion

    2018-4-3 · The influence of nozzle geometry on spray and combustion of diesel continues to be a topic of great research interest. One area of promise, injector nozzles with micro-holes (i.e. down to 30 μm), still need further investigation. Reduction of nozzle orifice diameter and increased fuel injection pres

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  • The influence of geometrical and operational parameters on ...

    2013-8-7 · The effects of operational and geometrical parameters on pressure distribution and flow pattern in Y-jet atomizers were studied using an experimental apparatus working with air and water. The results show that the mixing point pressure is very dependent on the diameter ratio of the mixing duct and the air port and the water supply pressure ratio.

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  • Experimental and numerical investigation of the influence ...

    2012-9-1 · The investigation into the influence of geometry was limited to different sizes of the mixer and the diffuser with a constant geometry of the motive nozzle. Download : Download full-size image; Fig. 2. The ejector assembly. 1 – the nozzle section, 2 – the mixing …

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

    2018-12-1 · The air-jet nozzle consists of different components. For the air suction channel, there are fibers inlet and outlet, and main and sub holes. Fig. 19 shows the structure of air jet nozzle profile. The structures of the nozzle, such as the diameters of the main and sub-holes, the number of sub-holes and angles of sub-holes (θ), have significant ...

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  • Strategies for optimal use of fluids in grinding ...

    2011-6-1 · The influence of the nozzle position and effect of the air boundary have also been addressed . In a recent work Morgan et al. [12] used computational fluid dynamics and experimental techniques to show that achievable useful flowrate depends on wheel characteristics and grinding parameters (porosity and speed) whereas real useful flowrate is ...

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  • Effect of nozzle structure on coal breakage of SC-CO2 used ...

    2020-11-3 · Supercritical carbon dioxide (SC-CO2) jet is a promising technology for the extraction of coalbed methane. As a key component in the process of jet formation, the nozzle is an essential factor affecting the efficiency with which an SC-CO2 jet breaks coal and rock. The nozzle structure directly affects the energy conversion rate and flow field structure of the jet…

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  • Effect of nozzle orifice geometry on spray, combustion ...

    2011-3-1 · The influence of nozzle geometry on mass flow rate and turbulence levels at the nozzle orifice exit is investigated next since these parameters are directly input in spray simulations as rate profiles for cavitation, turbulence, and fuel mass injected . Download : Download full-size image; Fig. 8.

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  • Influences of nozzle flow and nozzle geometry on the shape ...

    2003-2-1 · Influences of nozzle flow and nozzle geometry on the shape and size of an air core in a hollow cone swirl nozzle M R Halder, S K Dash, and S K Som Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 2003 217 : 2 , 207-217

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  • Unraveling the Geometry Dependence of In-Nozzle

    2013-6-25 · For the case of the jet from the R-nozzle, although the jet cross-sectional distribution distorted from a circular cross section at 0.2 mm to an elliptical shape at 1.0 and 3.0 mm, the volume ...

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  • Numerical Investigation of Nozzle Jet Flow in a Pelton ...

    2021-8-8 · The characterization of flow through Pelton hydro turbines allows the optimization of their operation and maximization of energy performance. The flow in the injector of Pelton turbines and in the free jet area (the area from the injector outlet surface to the runner bucket inlet surface) is influenced by several parameters: the geometry of injector components (nozzle and injector spear), the ...

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  • Numerical study for the influences of primary nozzle on ...

    2016-8-5 · The core of the supersonic flow is located in the nozzle exit interface, so the geometry of the nozzle has an important influence on the flow inside the ejector. Based on improving the geometry of supersonic nozzle, Sharifi et al. [14] designed 10 different nozzle profiles, which not only effectively solved the low vacuum problem in the ...

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  • Influence of nozzle design and process parameters on ...

    2016-12-20 · The effect of abrasive swirl flow inside the nozzle on surface roughness (Ra) was studied. The objective of this investigation is to make holes on carbon fiber reinforced composite material using an abrasive jet machine. The influence of nozzle geometry and abrasive jet …

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  • Effect of Micro-Hole Nozzle on Diesel Spray and Combustion

    2018-4-3 · The influence of nozzle geometry on spray and combustion of diesel continues to be a topic of great research interest. One area of promise, injector nozzles with micro-holes (i.e. down to 30 μm), still need further investigation. Reduction of nozzle orifice diameter and increased fuel injection pres

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  • 1995 Analysis and design of air-jet pumps for pneumatic ...

    2020-10-13 · jet pump geometry, a systematic experimental investigation is undertaken into the characteristic performance of central air-jet pumps with five different nozzle geometry and annular air-jet pumps with multi-hole ring nozzles operating under both air-only and air-solid flow conditions.

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  • Study of the Different Factors That Influence Jet Pump ...

    2013-12-24 · Keywords: Jet Pump; Nozzle-Throat Interface; Driving Air Pressure . 1. Introduction . The jet pump is a low-pressure high volume flow rate pump. Simplicity of design, absence of any moving parts, ability to handle muddy water, reliability, ruggedness, and low cost, more than compensate for the relatively poor efficiency of the pump.

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  • Nozzle Length Effect on the Performance of the Jet-Driven ...

    2021-2-18 · The optimal nozzle length ln/dn, the corresponding chamber length Lch/dn, and the outlet diameter dout/dn are determined. The air jet development within the nozzle and the formation of an inverse flow zone between the nozzle wall and the jet periphery and a chain of vortex structures in the mixing layer are considered.

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  • Effects of axisymmetric sonic nozzle geometry on Mach disk ...

    2012-5-17 · Influence of nozzle geometry on the near-field structure of a highly underexpanded sonic jet Journal of Fluids and Structures, Vol. 24, No. 2 Hysteresis Phenomena of Mach Disk in Under-expanded Jet with Condensation

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  • Time-dependent calculation of the velocity of a yarn ...

    In air-jet weaving looms the yarn is initially accelerated by the main nozzle. To obtain a high yarn velocity a high air velocity is required which results in complex flow patterns. Consequently, predicting the influence of a change in geometry or inlet pressure on the yarn velocity is not straightforward. In this research a fast time-dependent fluid-structure interaction framework is used to ...

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  • [PDF] The Mechanism of the Air-Jet Texturing: The Role of ...

    A comprehensive review of the roles played by the airflow, wetting and spin finish on the air-jet texturing process is given. The results of an experimental investigation of the air-jet texturing process using residual spin finish, yarn-to-yarn static and kinetic friction, filament strength, filament diameter, and on-line tension measurements and high-speed cine-photography are reported.

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  • Influence of the Excitation Frequency and Orifice Geometry ...

    Request PDF | Influence of the Excitation Frequency and Orifice Geometry on the Fluid Flow and Heat Transfer Characteristics of Synthetic Jet Actuators | Synthetic jet is a novel fluctuating time ...

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  • Influence of the Number of Circumferential Nozzles on the ...

    Influence of the Number of Circumferential Nozzles on the Flow and Heat Transfer Characteristics of Swirl Cooling July 2018 Hsi-An Chiao Tung Ta Hsueh/Journal of Xi'an Jiaotong University 52(7):94-100

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  • Enhancing the Aggressive Intensity of a Cavitating Jet by ...

    2011-9-26 · In order to enhance the aggressive intensity of a cavitating jet for practical applications, the effect of the geometry of the nozzle through which the jet is driven on the aggressive intensity was investigated. The nozzle under test was cylindrical and consisted …

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  • Spray cone angle prediction model considering nozzle

    nozzles and diesel fuel (DIN EN 590). The first nozzle is a cylindrical one, the other two are conical (conicity factor 2.7 and 5.7). Unexpectedly, the nozzle with the highest conicity factor exhibits the largest cone angle. The other two nozzles have nearly a similar value of the angle despite the different geometry.

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  • Influence of Key Structural Parameters of Combustion ...

    2017-3-8 · Influence of Key Structural Parameters of Combustion Chamber on the Performance of Diesel Engine ... Effect of Nozzle and Combustion Chamber Geometry on the Performance of a Diesel Engine Operated on Dual Fuel Mode Using Renewable Fuels ... Parametric Analysis of Piston Bowl Geometry and Injection Nozzle Configuration Using 3D CFD and DoE,” SAE.

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  • The Effect of Reynolds Number on Jet in Asymmetric Co ...

    2018-10-24 · In rotary kilns in grate-kiln systems for iron ore pelletizing, a long and stable jet flame is needed to ensure a high quality of the pellets. The primary jet issuing from the nozzle interacts with two asymmetric co-flows creating a very complex flow. In order to better understand and eventually model this flow with quality and trust, simplified cases need to be studied.

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  • The Influence of Cylindrical Spray Chamber Geometry on the ...

    2019-4-15 · Spray chamber geometry was modified to yield three different chamber height-to-diameter ratios and two different nozzle stand-off distances. Sprays from three nozzles, two single-hole nozzles with different diameter and one twin-hole nozzle (THN), were examined for two injection pressures of 100 MPa and 150 MPa into two chamber pressures of 0.1 ...

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  • Air-Powered Liquid Needle Free Injectors: Design,

    2013-4-2 · pressure (400-800 kPa), nozzle size (130-250 μm) and injection chamber length (10-25 mm). The results of these tests are then compared to the behaviour prescribed by the model. An analysis of these results indicates that the present model can accurately be used to predict the performance of air-powered needle free liquid jet injectors.

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  • Optimization of Direct-Injection H2 Combustion Engine ...

    2011-5-25 · Combustion Engine Performance, Efficiency, and Emissions 8 Influence of nozzle design Significantly influences jet penetration pattern andmixture formation Jet-to-jet interaction must be considered Influence of injection strategy Start of injection (SOI) influences stratification Later injection desirable to reduce compression work

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  • The Influence of Film-Cooling on the Aerodynamic ...

    2014-12-24 · The paper presents the results of an investigation on the aerodynamic performance of a full coverage film-cooled nozzle guide vane. The blading is a typical high pressure turbine vane of advanced design, working in the high subsonic regime.

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  • GAS EJECTOR MODELING FOR DESIGN AND ANALYSIS

    2021-5-14 · converging-diverging nozzle..... 17 Fig. 2.3 Maximum mass flow rate vs. stagnation pressure for various throat diameters, with air at TK0 =300 ..... 20 Fig. 2.4 Nozzle and diffuser shapes for subsonic flow

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  • Fuel Injection: Breaking Up is Hard to Do - Ansys

    2020-11-11 · The performance of a fuel injection nozzle in breaking up the liquid fuel into spray droplets and the fuel–air mixing in the engine cylinder have a major impact on fuel economy and emissions. Both primary and secondary breakup phenomena occur simultaneously in the spray formation process. The primary breakup refers to the liquid jet ...

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  • The Influence of Retraction on Three-Stream Injector ...

    2016-7-15 · Herein, the effects of nozzle geometry, grid resolution, modulation, and gas flow rate on the acoustics and spray character within an industrial scale system were investigated computationally using axisymmetric (AS) and three-dimensional (3D) models.

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  • Zhenan Bao's Profile

    Zhenan Bao is part of Stanford Profiles, official site for faculty, postdocs, students and staff information (Expertise, Bio, Research, Publications, and more). The site facilitates research and collaboration in academic endeavors.

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  • Numerical Simulations of the Effect of Cold Fuel ...

    2020-9-15 · In the present study, Large Eddy Simulations (LES) have been performed with a 3D model of a step nozzle injector, using n-pentane as the injected fluid, a representative of the high-volatility components in gasoline.The influence of fuel temperature and injection pressure were investigated in conditions that shed light on engine cold-start, a phenomenon prevalent in a number of combustion ...

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  • Chapter 9 THE MATERIALS SELECTION PROCESS

    2013-6-4 · performance index (γ) is optimum for the application. numerical value of property x 100 B = scaled property = -----maximum value in the list Materials and Process Selection for Engineering Design: Mahmoud Farag 18. Comparing and ranking alternatives I Weighted properties method II For cost, corrosion loss, etc., a lower value is more desirable ...

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  • Influences on the Sprays Formed by High-Shear Fuel Nozzle ...

    2012-5-23 · Influences on the Sprays Formed by High-Shear Fuel Nozzle/S wirler Assemblies. ... On the influence of geometrical parameters on the spray characteristics of high shear injectors. ... Liquid Film Formation by an Impinging Jet in a High-Velocity Air Stream.

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  • Time-dependent calculation of the velocity of a yarn ...

    In air-jet weaving looms the yarn is initially accelerated by the main nozzle. To obtain a high yarn velocity a high air velocity is required which results in complex flow patterns. Consequently, predicting the influence of a change in geometry or inlet pressure on the yarn velocity is not straightforward.

    Get Price
  • Influence of Venturi Tube Geometry and Particle

    In the geometry study, we investigated numerically and experimentally the influence of several geometrical parameters on the cavitation inception and bubble generation. Using a dimensionless number analysis, an inverse relation is found between the cavitation inception and the single-phase flow resistance set by the geometry. In

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  • Injector Nozzle Hole Parameters and their Influence on ...

    2009-2-9 · Injector Nozzle Hole Parameters and their Influence on Real DI Diesel Performance Mikael Lindström Licentiate thesis Academic thesis, which with the approval of Kungliga Tekniska Högskolan, will be presented for public review in fulfillment of the requirements for a Licentiate of Engineering in Machine Design.

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  • OPTIMIZATION OF UHP WATERJET CUTTING HEADS, THE

    2014-4-14 · 3.2 Geometry 3.2.1 Jewel A great deal of research has gone into the geometry and finishing of the jewel. The shape of the entry edge of the bore has a great influence over the nature of the flow through the orifice. See figures 5 and 6. The hole diameter, the hole entrance geometry and the pressure

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  • Effects of pylon geometry on mixing enhancement in a ...

    In the current study the effect of variations in pylon geometry on performance parameters such as flammable plume area, fuel jet penetration, mixing efficiency, total pressure loss and streamwise vorticity are investigated for a combustor inlet Mach number of 2.2 which approximates a flight Mach number of 5, at a total pressure of 4bar and ...

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  • CHARACTERIZING THE INFLUENCE OF PRINT

    2019-12-10 · 80°C, nozzle temperature of 235°C, print speed of 60 mm/s, solid infill speed of 20 mm/s, nozzle diameter 0.35 mm, and 0 perimeters. The parameters chosen for study were the infill percentage and layer height. Additionally, the chosen layer heights were obtained as ratios of nozzle diameter to enable a more direct comparison to other nozzle ...

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  • EFFECT OF NOZZLE DIAMETER ON MACROSCOPIC SPRAY

    ABSTRACT. Nozzle diameters play a key role in the atomization and evaporation processes of diesel fuel. However, the influence of nozzle diameter on the spray characteristics of heavy-duty diesel engines rarely involves cold-start conditions, especially considering the coupling of the nozzle with the ambient temperature and fuel properties.

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  • Computational aeroacoustics - Issues and methods

    2012-5-17 · Comparison of Computational Aeroacoustics Prediction of Acoustic Transmission Through a Three Dimensional Stator Geometry with Experiment. Duane R. Hixon , Edmane Envia , Milo D. Dahl and. Daniel L. Sutliff. 10 January 2014. Acoustics propagation and wave interference by scalar wave equation. Joseph J. Shang.

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  • VI. On the capillary phenomena of jets

    Abstract. When water issues under high pressure from a circular orifice in a thin plate, a jet is formed whose section, though diminished in area, retains the circular form. But if the orifice be not circular, the section of the jet undergoes remarkable transformations, which were elaborately investigated by Bidone, many years ago.

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  • Influence of orifice geometry on atomization ...

    2020-9-16 · Pressure swirl nozzle is widely adopted in various kinds of power equipment such as rocket engine, aircraft engine and gas turbine due to its simple structure, good atomization performance, and low cost. 1 Sauter mean diameter (SMD), droplet velocity and spray cone angle are the key parameters of the pressure swirl nozzle which reflects the quality of droplet generation, transport and ...

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  • PPT – The Effects of Nozzle Geometry on the Specific ...

    The Effects of Nozzle Geometry on the Specific Impulse of a Pulse Detonation Engine-Final Project Report-12/04/01 Madeline Close and Christopher Johnson – A free PowerPoint PPT presentation (displayed as a Flash slide show) on PowerShow.com - id: 6d09fb-YmVjM

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  • Numerical Investigation of the Influence of Real World ...

    2010-12-22 · Numerical Investigation of the Influence of Real World Blade Profile Variations on the Aerodynamic Performance of Transonic Nozzle Guide Vanes J. Turbomach (March,2012) Surface Heat Transfer Fluctuations on a Turbine Rotor Blade Due to Upstream Shock Wave Passing

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  • Numerical Investigation of the Effects of Primary Nozzle ...

    2020-11-30 · In this paper, the effects of using different primary nozzles on the performance of a supersonic ejector of an ejector refrigeration system have …

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  • Structure Optimization and Numerical Simulation of Nozzle ...

    Three kinds of nozzles normally used in industrial production are numerically simulated, and the structure of nozzle with the best jetting performance out of the three nozzles is optimized. The R 90 nozzle displays the most optimal jetting properties, including the smooth transition of the nozzle’s inner surface. Simulation results of all sample nozzles in this study show that the helix ...

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  • Copyright 2015 Jingwei Zhu

    adjustable needle. An adjustable nozzle based on this new control mechanism is designed and manufactured for experiments with R134a. The experimental results show that, without changing the nozzle geometry, the nozzle restrictiveness on the two-phase flow can be adjusted over a wide range.

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  • Influence of Cooling Jets on Stress Pattern and Anisotropy ...

    2020-8-19 · The over-pressure in air boxes is 880 Pa for 8 mm glass and 7000 Pa for 4 mm glass. The distribution of the heat transfer coefficients is solved with OpenFOAM CFD (Computational Fluid Dynamics) software as in ref. [12]. The ratio of the nozzle-to-plate distance and nozzle …

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  • Use of dual planar jets for the reduction of flow-induced ...

    2017-2-28 · The planar jet has been proposed to reduce the flow-induced noise. However, the self-noise emission from a single planar jet is a limiting factor on the performance based characteristics of this technology. Therefore, this research paper reports an alternative dual planar jets geometry in an attempt to minimize the self-noise of the single planar jet, thus, further enhancing total noise ...

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  • Design and applications of surfaces that control the ...

    2021-7-16 · The accumulation of foreign substances on a surface, whether it is dirt on a window or ice on an airplane wing, can lead to hazardous conditions. Many surfaces have been engineered to resist the accumulation of one type of fluid or matter in a particular state, but engineering broader resistivity has remained a challenge. For example, surfaces that repel water droplets may still be susceptible ...

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  • PW100-150 - Pratt & Whitney

    1,800 to over 5,000 shaft horsepower. The PW100/PW150 engine family is the benchmark for low fuel consumption on routes of 350 miles or less. That means they consume 25% to 40% less fuel and produce up to 50% fewer CO2 emissions than …

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  • Influence of the Injector Geometry on Primary Breakup in ...

    2014-4-1 · Diesel injection systems have a significant impact on the performance as well as emission and pollutant formation of modern diesel engines. Even though the geometry of atomizers became more and more complex over the last years, injection systems still have a large potential for improving the overall diesel engine combustion process.

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  • Copyright 2015 Jingwei Zhu

    adjustable needle. An adjustable nozzle based on this new control mechanism is designed and manufactured for experiments with R134a. The experimental results show that, without changing the nozzle geometry, the nozzle restrictiveness on the two-phase flow can be adjusted over a wide range.

    Get Price
  • The effect of nozzle diameter, injection pressure and ...

    2017-3-1 · This simulation was done in different nozzle diameter 0.12 mm and 0.2 mm performed at the ambient temperature 500 K and 700 K with different injection pressure 40 MPa, 70 MPa and 140 MPa. Results show that high pressure influence droplet diameter become smaller and the penetration length longer with the high injection pressure apply.

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  • Development of a high-volume air sampler for nanoparticles.

    The influence of particle loading on the pressure drop and separation performance was discussed. A supplemental inlet for the nano-particle collection applied to an existing portable high-volume air sampler was devised and the consistency with other types of existing samplers was discussed based on the sampling of ambient particles.

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  • Effect of Tabs on the Flow and Noise Field of an ...

    2019-12-18 · conduct a study on the jet flowfield under the influence of tabs. They used rectangular tabs in a subsonic jet and ob- served a significant increase in the jet centerline velocity decay when two tabs were located 180 deg apart at the jet nozzle exit. They also …

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  • Frontiers

    2021-2-15 · Differing types and magnitudes of charge motion are incorporated in SI engines to aid with mixture preparation but the influence of charge motion over lean combustion performance, particularly in jet ignition engines, is less well understood. …

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  • Similarity spectra analysis of high-performance jet ...

    2013-4-3 · Even though the nozzle geometry is complex and the jet is nonideally expanded, the similarity spectra do agree with large portions of the measured spectra. Toward the sideline, the fine-scale similarity spectrum is used, while the large-scale …

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  • On the two components of turbulent mixing noise from ...

    2012-8-22 · On the two components of turbulent mixing noise from supersonic jets. Christopher Tam , Michel Golebiowski and. J. Seiner. Christopher Tam. Florida State Univ., Tallahassee. Search for more papers by this author. , Michel Golebiowski.

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  • Influence of Hardware Design on the Flow Field Structures ...

    In this study, the influence of the swirling air outlet geometry is evaluated relative to the effect on the flow field structures and the patterns of droplet dispersion. This is accomplished by comparing the continuous-phase (air in the presence of a spray) and dispersed-phase (droplets) behavior downstream of the swirl cup assembly outfitted ...

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  • Converging Diverging Nozzle

    2005-2-23 · To get a basic feel for the behavior of the nozzle imagine performing the simple experiment shown in figure 2. Here we use a converging diverging nozzle to connect two air cylinders. Cylinder A contains air at high pressure, and takes the place of the chamber. The CD nozzle exhausts this air into cylinder B, which takes the place of the tank.

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  • THRUST VECTORING NOZZLE FOR MILITARY AIRCRAFT

    2013-1-3 · an influence upon Life Cycle Cost. There are several types of Thrust Vectoring Nozzles. For example, there are 2-D and 3-D Thrust Vectoring Nozzles. The ITP Nozzle is a 3-D Vectoring Nozzle. Also, there are different ways to achieve the deflection of the gas jet: the most efficient one is …

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  • Experimental Study of Air-Lift Pumps Characteristics

    2015-2-2 · the percentage of the distance between throat section and nozzle and the driving air pressure, suction head and also study the effect of each parameter on the air lift pump characteristics in order to have a better performance of such pump under various conditions. A certain geometry for air-lift pump designed and manufactured.

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  • Effect of the plasma-induced magnetic field on a magnetic ...

    2016-6-21 · A magnetic nozzle (MN) is an axisymmetric, longitudinal magnetic field with a convergent-divergent (or merely divergent) geometry that can guide, expand and accelerate a plasma [1–6].MNs are promising for space plasma propulsion thanks to their ability to contactlessly accelerate and control in-flight a high velocity plasma jet.

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  • Hot-Jet Noise Test of a Revised Notched Nozzle

    2013-7-9 · The hot-jet test with and without the mixing device served as a compact and flexible test for aerodynamic evaluation of the nozzle. The noise test results under the hot-jet condition with this rig showed that the noise reduction characteristics of the finer-notched nozzle are different from those of conventional mixers.

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  • MECHANISM AND PERFORMANCE OF CO 2 SNOW JET IN

    2020-11-29 · Mechanism and Performance of CO 2 Snow Jet in Co-Axial Type Injection Systems 251 The pressure-temperature diagram of the carbon dioxide is illustrated in Fig. 1. In the CO2 snow jet nozzle, the liquid carbon dioxide expands through the expansion orifice and the temperature is cooled down to below triple point (5.2atm, 216.8K) with Joule-

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  • LES Simulation of the Internal Flow and Near-Field Spray ...

    2008-4-14 · The VOF-LES simulation results reveal that the origin of the jet-string primary breakup structure is the irregular detachment of the liquid flow form the injector nozzle surfaces, upstream of the nozzle exit. This engenders “ingestion” of ambient air into the nozzle, which promotes the irregular growth of the Kelvin-Helmholtz instabilities ...

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  • Spray Characteristics of Plain-Jet Airblast Atomizers

    2015-4-7 · The effects of air and liquid properties, and atomizer dimensions, on the spray characteristics of plain-jet airblast atomizers are examined. Mean drop size and drop-size distribution are measured using an improved form of light scattering technique.

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  • Analysis and experiment on atomizing characteristics of ...

    2016-10-1 · Atomizing nozzle is a crucial part of spray device. And it is widely applied in many fields such as agricultural spraying, plant cooling and dust suppression. Moreover, the atomizing performance of nozzle has a great influence on the size and velocity of droplet, and the flow distribution.

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  • A Piston Geometry and Nozzle Spray Angle Investigation in ...

    2015-3-1 · This paper investigates the effects of the combustion chamber geometry and spray angle on the air-fuel mixing and emissions formation of a DI diesel engine. A new quantitative factor measuring the air-fuel mixing quality has been adopted in order to analyze and compare air …

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  • ISIJ International - JST

    Nozzle is the key component of the UFC equipment, which has great influence on the cooling performance. In this paper, the influence of internal structure of the nozzle on the heat transfer performance of water jet impingement was studied experimentally, so as to obtain an excellent nozzle …

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