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  • (PDF) Effect of Nozzle Geometry on Air-Jet Texturing ...

    'Effect of Nozzle Geometry on the Flow Charact eris tics of Small W ater Jets', Proceedings of the Institution of Mechanical Engineers, Part C, Journal of M echanical Engineering Science, Vol. 220 ...

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  • Effect of Nozzle Geometry on Air-Jet Texturing

    2020-4-22 · Rectangular Nozzle Design Some of the most widely used air-jet texturing nozzles in industry are of the Heberlein HemaJet type, whose basic design consists of a uniform main channel of circular cross section with a trumpet-shaped exit section and an air inlet passage at an angle of approximately 45° to introduce the compressed air.

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

    Results are presented of a wide-ranging investigation of geometry effects on the flow parameters and jet characteristics of nozzles with diameters between 120 and 170 mu m. Nozzles …

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  • The Effect of Nozzle Geometry on Pressure Drop and

    2009-8-24 · Whelan, BP, & Robinson, AJ. 'The Effect of Nozzle Geometry on Pressure Drop and Heat Transfer to Free Surface Liquid Jet Arrays.' Proceedings of the ASME/JSME 2007 Thermal Engineering Heat Transfer Summer Conference collocated with the ASME 2007 InterPACK Conference.

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  • (PDF) Effects of Anode Nozzle Geometry on Ambient Air ...

    Effects of Anode Nozzle Geometry on Ambient Air Entrainment Into Thermal Plasma Jets Generated by Nontransferred Plasma Torch …

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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 low pressure drop.

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  • (PDF) Analysis of the Influence of Diesel Nozzle Geometry

    The main noticeable effect of L/D was found to be at the exit of the nozzles where different types of in-nozzle flow would be experienced due to different length of the nozzles …

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  • NOZZLES - UPM

    2021-1-2 · The classical quasi-one-dimensional Laval nozzle, which has a slender geometry, with a rapidly converging short entrance, a rounded throat, and a long conical exhaust of some 15º half-cone angle (the loss of thrust due to jet …

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  • (PDF) Design of high pressure waterjet nozzles

    2015-7-29 · R. Kobayashi, T. Arai and Y. Masuki, 'Water Jet Nozzle Geometry and Its effect On Erosion Process of Metallic Material', 5th American Water Jet …

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  • (PDF) CFD Study of Effects of Geometry Variations on

    Abstract and Figures. Reynolds-Averaged Navier-Stokes simulations have been performed to investigate the effect of nozzle geometry …

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  • (PDF) Effect of nozzle geometry on pressure drop and

    Effect of nozzle geometry on pressure drop and heat transfer in submerged jet arrays ... Design of a jet impingement cooling device for densely packed PV cells under high concentration. By vijay nagathan. Influence of the shape of the nozzle on local heat transfer distribution between smooth flat surface and impinging air jet. By Vadiraj …

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  • Effects of axisymmetric sonic nozzle geometry on Mach

    2012-5-17 · Effect of axisymmetric sonic nozzle geometry on characteristics of supersonic air jet Journal of Thermal Science, Vol. 13, No. 2 An experimental study of underexpanded sonic, coaxial, swirl jets

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  • Investigation into the effect of nozzle shape on the ...

    2010-8-25 · High velocity impinging air jets are commonly used for heating, cooling and drying, etc. because of the high heat and mass transfer coefficients which are developed in the impingement region. In order to provide data for the designers of industrial equipment, a variety of slot nozzles were tested to determine the effect on heat transfer of both nozzle …

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  • DESIGN AND CFD ANALYSIS OF CONVERGENT AND

    2017-9-25 · But the design of Tri-nozzle is optimized to have high expansion co-efficient than single nozzle without altering the divergent angle. In the present paper, flow through theTri-nozzle and convergent divergent nozzle study is carried out by using SOLID WORKS PREMIUM 2014.The nozzle geometry modeling and mesh …

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  • Effect of nozzle geometry for swirl type twin-fluid water ...

    2011-7-29 · Experimental investigations on the atomization characteristics of twin-fluid water mist nozzle were conducted using particle image velocimetry (PIV) system and particle motion analysis system (PMAS). The twin-fluid water mist nozzles with swirlers designed two types of swirl angles such as 0°, 90° and three different size nozzle …

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  • NOZZLES - UPM

    2021-1-2 · The classical quasi-one-dimensional Laval nozzle, which has a slender geometry, with a rapidly converging short entrance, a rounded throat, and a long conical exhaust of some 15º half-cone angle (the loss of thrust due to jet …

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  • (PDF) Effect of Jet Nozzle-Lip Momentum Loss on ...

    Effects of the nozzle-lip thickness B. Adjustment of C μ for different nozzle-lip thicknessesIn the following, results of two additional cases (D and E) are presented to show that the effect of the nozzle-lip thickness on the jet velocity over the Coanda surface (and thus on the performance of the airfoil) is explained mostly by the loss …

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  • Numerical study of the effect of geometric parameters on ...

    2021-5-1 · The fluid in the nozzle depends on the structure size of the nozzle and determines the outlet state of the nozzle. The outlet state of the nozzle directly affects its atomization effect. Therefore, the nozzle structure and internal flow field should be the primary concern. The above research provides a simulation method for the flow in the nozzle.

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  • Numerical investigation on the effect of nozzle position ...

    2017-11-5 · This present article considers the effect of nozzle position on the entrainment ratio and pressure lift ratio of ejector, and analysis the flow field inside the ejector with a view towards optimizing the ejector design, and thus improving the efficiency and performance of ejector. 2. Geometry establishment and model …

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  • The Effects of Nozzle Diameter on Impinging Jet Heat ...

    2003-12-16 · This may be attributed to an increase in the jet momentum and turbulence intensity level with the larger nozzle diameter, which results in the heat transfer augmentation. In the mean time, the effect of the nozzle diameter on the local Nusselt numbers is negligibly small at the wall jet region corresponding to r …

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  • Effect of nozzle geometry on the efficiency of

    All nozzles showed comparable mass flow rates for the same impact force and the difference was in the order of 5% better than a straight pipe geometry. Only the energy saving nozzle used around 10% less mass flow and is the best solution to reduce compressed air consumption without losing performance. en_ZA. …

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  • Nozzle geometry effects on supersonic jet interaction ...

    2012-5-17 · American Institute of Aeronautics and Astronautics 12700 Sunrise Valley Drive, Suite 200 Reston, VA 20191-5807 703.264.7500

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  • (PDF) Influence of the Nozzle Geometry on Spray-Dried ...

    Download Free PDF. Download Free PDF. Influence of the Nozzle Geometry on Spray-Dried Particle Formation Expanding Superheated Suspensions. Chemical Engineering & Technology, 2003. Peter Walzel. Download PDF. Download Full PDF Package. This paper. A short summary of this paper.

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  • (PDF) INTERNATIONAL JOURNAL OF MATERIALS

    INTERNATIONAL JOURNAL OF MATERIALS SCIENCE AND ENGINEERING EFFECT OF NOZZLE GEOMETRY ON EXIT VELOCITY, TEMPRATURE AND PRESSURE FOR COLD SPRAY PROCESS. Zic Haddy. Download PDF. Download Full PDF Package. This paper. A short summary of this paper. 31 Full PDFs related to this paper. READ …

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  • Influence of nozzle geometry on underexpanded

    2012-7-4 · The effect of nozzle geometry on the structure of a supersonic free jet is investigated both experimentally and numerically for three simple nozzle geometries. In the experiments, the relation between the Mach disk height and diameter and the nozzle pressure ratio are investigated using the schlieren method. In contrast to …

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  • Nozzles - NASA

    2021-5-13 · The nozzle sits downstream of the power turbine. A nozzle is a relatively simple device, just a specially shaped tube through which hot gases flow. However, the mathematics which describe the operation of the nozzle takes some careful thought. As shown above, nozzles come in a variety of shapes and sizes …

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  • IEEE TRANSACTIONS ON PLASMA SCIENCE, VOL.

    2019-4-29 · the geometrical effects of nozzle shape on the ambient air entrainment for an optimal design of nozzle electrode. Fig. 1 describes the geometry of a new stepped nozzle and a conventional cylindrical nozzle, which has been considered in this experimental work. The employment of the stepped nozzle was originally …

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  • Nozzle Design - NASA

    2021-5-13 · A rocket engine uses a nozzle to accelerate hot exhaust to produce thrust as described by Newton's third law of motion. The amount of thrust produced by the engine depends on the mass flow rate through the engine, the exit velocity of the flow, and the pressure at the exit of the engine. The value of these three flow variables are all determined by the rocket nozzle design.

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  • (PDF) Effect of nozzle arrangement on Venturi scrubber ...

    Ind. Eng. Chem. Res. 1999, 38, 4889-4900 4889 Effect of Nozzle Arrangement on Venturi Scrubber Performance Nochur V. Ananthanarayanan and Shekar Viswanathan1 Department of Chemical and Environmental Engineering, National University of Singapore, 10, Kent Ridge Crescent, Singapore 119260, Singapore The effect of nozzle …

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  • Effect of linear density of feed yarn filaments and air ...

    2016-7-20 · Yarn linear density per filament and air-jet texturing process parameters, such as overfeed, air pressure and texturing speed are the key factors which influence yarn structure and hence fabric properties. The individual effect of feed yarn properties and air-jet process variables in the production of air-jet

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  • Effect of Nozzle Geometry and Distance on Cooling ...

    where, u a is the collision velocity of the jet, x n is the nozzle span, ν is the kinematic viscosity coefficient and α av is the average heat transfer coefficient. The collision velocity of the jet was measured at each nozzle distance by a hot wire gas flow meter. The measured data organized by the moving average of 20 points are …

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  • Nozzle Design - Converging/Diverging (CD) Nozzle

    2021-5-13 · This nozzle configuration is called a convergent-divergent, or CD, nozzle. In a CD nozzle, the hot exhaust leaves the combustion chamber and converges down to the minimum area, or throat, of the nozzle…

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  • Metallurgical and Materials Transactions B, 2001, Vol.

    2003-7-29 · Tundish nozzle geometry is one of the few variables that are both very influential on the continuous casting process and relatively inexpensive to change. Slide-gates are commonly used to control the flow rate, but their off-center throttling generates asymmetry. Argon injection into the nozzle is widely employed to reduce nozzle …

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  • Jet Impingement Heat Transfer: Physics, Correlations,

    2011-5-31 · A successful design uses the bleed air in an efficient fashion to minimize ... 20 jet nozzle diameters) the decay in kinetic energy of the jet as it travels to the surface may reduce average Nu by 20% or more. (2) The hardware ... effect of the wall upstream. The nonuniform turning flow experiences high

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  • Influence of nozzle asymmetry on supersonic jets

    2012-5-17 · 27 January 2016 | The Aeronautical Journal, Vol. 118, No. 1209. Effects of area-ratio on the near-field flow characteristics and deflection of circular inclined coaxial jets. Experimental Thermal and Fluid Science, Vol. 54. Effect of a tab on the aerodynamical development and noise of an underexpanded supersonic jet.

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  • NUMERICAL AND VOLUMETRIC FREQUENCY OF

    2017-6-13 · jet-breakup process is inversely proportional to air speed, the surrounding water of the jet produces small droplets; conversely large droplets are produced by the axis of the jet due to the lower relative speed of the air that is already routing. This is the reason why the medium-sized droplets produced near the nozzle …

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  • Coupled CFD-Response Surface Method (RSM)

    2019-1-29 · Air Chamber Radius (mm) 0.030 Air Chamber Length (mm) 0.280 The ink jetting process is activated by an electrical pulse, generating a high pressure inside the nozzle, forcing the liquid to start to flow out of the orifice [3]. To replicate this process, a time-dependent velocity boundary condition is prescribed at the nozzle …

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  • Design of piston bowl geometry for better combustion

    2019-4-9 · geometry along with swirl ratio is modeled to reduce fuel consumption and emissions [7]. Piston bowl geometry plays an important role in the motion of air and fuel inside the cylinder. A high swirl ratio developed from piston geometry may produce better air–fuel mixture [8]. Park et al [9] studied the dimethyl ether (DME) …

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  • Structure Optimization and Numerical Simulation of

    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 …

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  • CHAPTER 21 Mechanical Design of Mixing Equipment

    2011-6-20 · Mechanical Design of Mixing Equipment D. S. DICKEY MixTech, Inc. J. B. FASANO Chemineer, Inc. 21-1 INTRODUCTION Mixing equipment must be designed for mechanical and process operation. Al-though mixer design begins with a focus on process requirements, the mechanical design is essential for successful operation. …

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  • Flow Visualization Studies of VTOL Aircraft Models

    2018-8-15 · jet-powered vertical takeoff and landing (VTOL) model during hover in ground effect was conducted. A surface oil flow technique was used to observe the flow patterns on the lower surfaces of the model. Wing height with respect to fuselage and nozzle pressure ratio are seen to have a strong effect on the wing …

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  • Jet Impingement Heat Transfer: Physics, Correlations,

    2011-5-31 · A successful design uses the bleed air in an efficient fashion to minimize ... 20 jet nozzle diameters) the decay in kinetic energy of the jet as it travels to the surface may reduce average Nu by 20% or more. (2) The hardware ... effect of the wall upstream. The nonuniform turning flow experiences high

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  • A piston geometry and nozzle spray angle

    2021-7-9 · A piston geometry and nozzle spray angle investigation in a DI diesel engine by quantifying the air-fuel mixture Pavlos Dimitriou1, Weiji Wang1 and Zhijun Peng2 1School of Engineering & Informatics, University of Sussex, Brighton, BN1 9QT, UK 2School of Engineering & Design, University of Hertfordshire, Hatfield, …

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  • Characterization of the Inlet Combustion Air in NIST's ...

    2015-3-10 · the fuel transport processes and combustion air aerodynamics. Thus, a detailed description of the inlet combustion air flow field, corresponding to both present and future operating conditions, is required in anticipation of the needs of both the modeler and nozzle designer. This report has been prepared to address …

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

    2020-11-11 · • The jet begins to break up closer to the nozzle hole exit, and the spray pattern is more stable with more fine-scale ... effect on spray simulation. CFD simulation with LES ... Delphi engineers are usi ng ANSYS computational fluid dynamics (CFD) software to design the fuel injector nozzle geometry to deliver …

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  • band Optimization Iran - IUST

    2012-10-16 · data. Some of the design parameters of an impinging jet oven such as the jet configuration, the nozzle diam-eter ðÞD , and the ratio between diameter and nozzle-to-bread distance (H=D) were taken reasonably based on literature.[11–13] However, the experimental setup was designed such that the air jet temperature …

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  • Effect of Geometry Variations on the Cooling

    2012-8-27 · The effect of a change of exactly these parameters on the film cooling performance will be analyzed. For a better assessment of the characteristic effects associated with contouring of the hole, every diffuser hole is compared to an adequate cylindrical hole.

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  • CHAPTER 21 Mechanical Design of Mixing Equipment

    2011-6-20 · Mechanical Design of Mixing Equipment D. S. DICKEY MixTech, Inc. J. B. FASANO Chemineer, Inc. 21-1 INTRODUCTION Mixing equipment must be designed for mechanical and process operation. Al-though mixer design begins with a focus on process requirements, the mechanical design is essential for successful operation. …

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  • Converging Diverging Nozzle - Virginia Tech

    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 …

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  • Study of the highly underexpanded sonic jet.

    2012-5-17 · 5 January 2013. Numerical study of the near-field of highly underexpanded turbulent gas jets. International Journal of Hydrogen Energy, Vol. 37, No. 22. An experimental investigation on the flow structure and mixture formation of low pressure ratio wall-impinging jets by a natural gas injector.

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  • Flow Visualization Studies of VTOL Aircraft Models

    2018-8-15 · jet-powered vertical takeoff and landing (VTOL) model during hover in ground effect was conducted. A surface oil flow technique was used to observe the flow patterns on the lower surfaces of the model. Wing height with respect to fuselage and nozzle pressure ratio are seen to have a strong effect on the wing …

    Get Price
  • Research on Impact of Cooling Fan’s Geometry on

    Research on Impact of Cooling Fan’s Geometry on Nozzle’s Heat Load of the Air-Cooled Diesel Engine. The Open Mechanical Engineering Journal , 2015, 9: 99-105. Jun Fu, Yuan Tang, Wenhua Yuan, Guangming Li, Wei Chen, Yi Ma. Electronic publication date 26/2/2015.

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  • BLASTING TECHNICAL INFORMATION - MC Finishing

    2021-6-28 · The air jet is 1/2 the ID of the nozzle and as the air stream is passed through both, it creates a low pressure which sucks the media from the hopper into the air stream. The media acceleration distance is very short ( from the nozzle to the workpiece-approximately 4 to 14”).

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  • MECHANICAL DESIGN CALCULATION - Hitard

    2018-9-28 · Design Parameters. Design Code : AD-MERKBLAETTER 2000 (11-2007) Karman Effects Prevented by 3 Helicoidal Plates at 120° : no Nozzle Local Load Design Method : WRC 107 (2002-10) Design length for vertical vessels : 500 mm Nozzle flanges in acc. with : ASME B16.5-2003/B16.47-1990 Specific Gravity of …

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  • PRESSURE VESSELS, Part I: Pressure Vessel Design,

    2017-7-27 · the design is by rules, whereas for Div.2 the design is by analysis, a much more exact method. The most important limitations of Div.1 are regarding pressure; when the design pressure exceeds 3000 psi (210 Kg/cm2); design according to Div.2 is required. Additionally, Div 1 cannot be used for pressures …

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  • Research on the effect of air flow extinguishing arc in ...

    2021-2-2 · A dual-jet arc-extinguishing method is proposed in order to improve the performance of jet-extinguishing gaps for extinguishing large currents and reducing the lightning trip-out rate of power lines. Meanwhile, we studied the arc-extinguishing effect of the dual-jet non-equilibrium field gas flow.

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  • Diesel Fuel Injector Nozzles

    2020-9-3 · Abstract: The fuel injector nozzle is critical to the performance and emissions of diesel engines.Some of the important injector nozzle parameters—including details of the injector seat, the injector sac and nozzle hole size and geometry…

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  • Optimal Nozzle Structure for an Abrasive Gas Jet for Rock

    Abrasive gas jet technologies are efficient and beneficial and are widely used to drill metal and glass substrates. When the inlet pressure is increased, gas jets could be powerful enough to break rock. They have potential uses in coal-bed methane exploration and drilling because of their one-of-a-kind nonliquid jet drilling, which …

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  • COMPUTATIONAL ANALYSIS OF CAVITY

    2021-4-16 · the mixing of fuel and air, while the other is to keep the flame alive in a Supersonic Combustion Ram-jet (SCRAMJET). These two distinct properties can be accomplished by altering the Cavity's aspect (L/D) ratio. Some excellent review papers on aspects of high-speed flow behaviour over the cavity have been …

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  • Basics of Space Flight: Rocket Propulsion

    2017-11-26 · Specific Impulse. The specific impulse of a rocket, I sp, is the ratio of the thrust to the flow rate of the weight ejected, that is where F is thrust, q is the rate of mass flow, and g o is standard gravity (9.80665 m/s 2).. Specific impulse is expressed in seconds. When the thrust and the flow rate remain constant …

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  • Continuous Casting: Modeling

    2000-3-22 · submerged entry nozzle, which is usually bifurcated. Nozzle geometry greatly affects the flow in the mold and is easy to change, so is an important subject of mathematical modeling. The jet leaving the nozzle flows across the mold and impinges against the shell solidifying at the narrow face. The flow pattern depends …

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  • A USER’S GUIDE TO SPRAY NOZZLES - TeeJet

    2020-4-6 · piece tip design or a two-piece disc and core design. Air induction hollow cone nozzles are a recent development that produces a spray pattern like a traditional cone spray, but with much coarser droplets to reduce drift. ( FIGURE 5 & 6). The full cone spray nozzle creates a full, circular spray pattern. Full cones

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  • Characterization of the Inlet Combustion Air in NIST's ...

    2015-3-10 · the fuel transport processes and combustion air aerodynamics. Thus, a detailed description of the inlet combustion air flow field, corresponding to both present and future operating conditions, is required in anticipation of the needs of both the modeler and nozzle designer. This report has been prepared to address …

    Get Price
  • BLASTING TECHNICAL INFORMATION - MC Finishing

    2021-6-28 · The air jet is 1/2 the ID of the nozzle and as the air stream is passed through both, it creates a low pressure which sucks the media from the hopper into the air stream. The media acceleration distance is very short ( from the nozzle to the workpiece-approximately 4 to 14”).

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  • A Simple Model for DoD Inkjet Frequency Response

    2017-2-28 · 9 frequency is lowered to fH√(1-ζ²), but in piezo DoD inkjet print- heads the damping correction to this frequency can be neglected. The residual decays to e-π 4.32% after a time equivalent to the ‘flat background’ frequency B = fH/Q.Since inkjet print-head drop

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  • Complex effect of recess depth in nozzle design on the ...

    Complex effect of recess depth in nozzle design on the discharge coefficient. We used contemporary computational fluid dynamics techniques to evaluate how the geometric parameters of a recessed nozzle affect the perfection of flow processes. We verified our numerical simulation and obtained acceptable agreement between …

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  • Rocket Propulsion Thrust Coefficient, Characteristic ...

    2020-6-17 · Other Nonideal Effects in Nozzles • Viscous effects –boundary layers and boundary layer-shock interactions –can use flow solvers or analytic approximations to estimate these effects • Losses due to (weak) shocks within nozzle • Heat losses (especially cooled nozzles) • often heat loss small fraction of flow …

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  • MECHANICAL DESIGN CALCULATION - Hitard

    2018-9-28 · Design Parameters. Design Code : AD-MERKBLAETTER 2000 (11-2007) Karman Effects Prevented by 3 Helicoidal Plates at 120° : no Nozzle Local Load Design Method : WRC 107 (2002-10) Design length for vertical vessels : 500 mm Nozzle flanges in acc. with : ASME B16.5-2003/B16.47-1990 Specific Gravity of …

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  • Principles of aerosol jet printing - IOPscience

    2018-7-5 · This effect is observed at a similar onset flow rate for different nozzle diameters, but varies with the deposition nozzle length, supporting this conclusion. This is dependent on the geometry of the deposition nozzle, and thus the data here for a Nanojet nozzle do not translate directly to the Optomec system, while the …

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  • Effect of endoscope flexibility on tissue dissection ...

    2021-2-17 · We developed an actuator-driven pulsed water jet device (ADPJ) for flexible neuroendoscopy to achieve effective tissue dissection with vasculature preservation. Although flexibility is a strong advantage for minimally invasiveness, the effect of the ductile curvature on the dissection profiles remains unknown. The …

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  • The Atmospheric-pressure Plasma Jet: A Review And ...

    2005-7-7 · vary, depending on the nozzle diameter and materials to be cut. Transferred arcs can slice steel plates up to 150 mm thick. For example, a plate, 40 mm thick, was cut at 0.7 m/min with a 600 A arc [23]. Several design variations on the transferred arc have been developed. A plasma arc heater uses the shield as …

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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 …

    Get Price
  • Review of Thrust Reverser Mechanism used in

    2013-11-13 · As per the geometry of jet engine, maximum thrust is available only at the exit of nozzle. It is seen in bucket target type of thrust reverser mechanism is more efficient than other types because maximum amount of thrust which is coming out from jet engine is made to be reversed by using deflector doors at the back of jet …

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  • PROCESS DESIGN OF AIR COOLED HEAT

    2016-3-6 · PROCESS DESIGN OF AIR COOLED HEAT EXCHANGERS (AIR COOLERS) (PROJECT STANDARDS AND SPECIFICATIONS) Page 6 of 19 Rev: 01 April 2011 adjusting mechanism and the bearings when the heat exchanger is at maximum operating temperature with free convection on the air side. The temperature effect …

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  • TheBasicsof AIR-COOLEDHEATEXCHANGERS

    2021-3-26 · Usually the tube surface exposed to the passage of air has extended surface in the form of fins to compensate for the low heat transfer rate of air at atmospheric pressure and at a low enough velocity for reasonable fan power consumption. The prime tube is usually round and of any metal suitable for the …

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  • PRESSURE VESSELS, Part I: Pressure Vessel Design,

    2017-7-27 · the design is by rules, whereas for Div.2 the design is by analysis, a much more exact method. The most important limitations of Div.1 are regarding pressure; when the design pressure exceeds 3000 psi (210 Kg/cm2); design according to Div.2 is required. Additionally, Div 1 cannot be used for pressures …

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  • Fabrication of nanofiber meltblown membranes and

    2017-2-3 · et al. [20–26] studied the effect of the slot die geometry on the air flow field below the MB die and its effect on the fiber size. The effect of the nose-piece shape on the flow field under the MB die was investigated experimentally by Tate and Shambaugh [21] and theoretically by using CFD simulations by Krutka and …

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  • CONTENTS 1. Injection Molding Machine

    2020-11-30 · A nozzle with the structure without PC stagnation is desirable as possible. Therefore, it is necessary to avoid using the needle shut off nozzle and torpedonozzle due to resin stagnation. The open nozzle is the best for use. The open nozzle is easy to cause drooling, stringiness, and it is difficult to prevent them but using a long-extended nozzle

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  • Numerical Prediction of Non-Reacting and Reacting Flow

    2008-11-24 · The effects of some design features of combustors are examined. In addition, the computed results are validated against experimental data. The numerical model encompasses the whole experimental flow passage, including the flow development sections for the air annulus and the fuel pipe, twelve channel air …

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  • A Review of Laminar Burning Velocity and Flame

    2017-2-13 · For (methane-air) mixtures the values were in reasonable agreement with those obtained using both the bomb hot wire anemometer and the nozzle burner track techniques Andrews G.E., 1973 Double kernel The velocity of gas on the axis of centers must be zero at the midpoint, and flame speed along this axis tends to the …

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