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  • Effect of Nozzle Geometry on Air-Jet Texturing Performance

    2020-4-22 · The air-jet texturing process is widely known for its ability to produce spun-like synthetic continuous filament yarns. Structural modification is achieved by contact of the continuous feed yarn with a supersonic air stream delivered by a nozzle. The details of the flow patterns are influenced by the geometry of the nozzle. This

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  • Experimental Study of the Effect of the Expansion

    Effect of nozzle geometry on pressure drop and heat transfer in submerged jet arrays ... Download Free PDF. ... Influence of the shape of the nozzle on local heat transfer distribution between smooth flat surface and impinging air jet. By Vadiraj Katti. Single-Phase Microscale Jet …

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  • Design of the nozzle of a yarn suction The Author(s) 2013 ...

    The nozzle aspect ratio has a more significant effect on the near-field jet stream characteristics for both fluids than the orifice inlet shape. Longer nozzles (l /d = 20) form more stable jet streams and delay the breakup of sheets, leading to greater breakup length than that attained with shorter nozzles (l /d = 5). For similar Reynolds ...

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  • Effect of a Wedge on Coannular Jet Noise

    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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  • Ansys Nozzle Jet - cdn.app.jackwills.com

    A Yarn inhalation tube B Nozzle including four jet orifices C Laval tube D Straight tube. Figure 3. Effect of the number of jet orifices N on yarn suction performance at ’¼75 and ¼60 : (a) yarn suction force F; (b) mass flow rate of compressed air G; (c) yarn suction efficiency . Table 1. Geometry parameters of the nozzle Geometry parameter ...

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  • Ansys Nozzle Jet - cdn.app.jackwills.com

    2006-5-18 · The effect of the wedge is the focus of the present paper. The wedge cases tried in the UCI experiment were limited. There could be ma ny variations of the wedge geometry, e.g., half -angle, base width relative to nozzle perimeter, shape of the side walls, etc.

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  • OPTIMIZATION OF A HIGH-EFFICIENCY JET EJECTOR BY ...

    2021-8-2 · Ansys Nozzle Jet modeling of mist and fog jet vikash kumar singh chauhan goal working on the fluent modeling of the fog and ... this analysis is totally depends on nozzle geometry and nozzle material is taken same for all cases this ... an effect on the mixing of water air and the abrasives and that the velocity of the wa jet coherence decreases

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  • ADVANCES in FLUID MECHANICS - WSEAS

    2021-7-31 · nozzle geometry and size nozzle configuration location of exhaust ports nozzle to target spacing surface motion and operating variables such as cross flow and jet axis velocity complicate the analysis Noise Reduction in Jet Engine using Chevron Nozzle May 15th, 2019 - conventional nozzles with minimal impact on performance In this project work ...

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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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  • 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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  • Experimental examination of nozzle geometry on water jet ...

    2011-9-2 · The effect of a nozzle’s internal geometry was studied experimentally to determine the breakup of the emitted water jet when it was injected perpendicularly into a quiescent atmosphere or a subsonic air crossflow. The nozzle’s diameter, nominal surface roughness, length-to-diameter ratio and contraction angle were varied, together with the ...

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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 d > 0.5 .

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  • Effect of Geometry of Pressure-Swirl Duplex Nozzle and

    2019-11-20 · Modern engines employ different geometrically designed nozzles. It is crucial to characterize the effect of the internal geometry of the nozzle and ALR on atomization characteristics. In this study, the effects of geometric parameters of the pressure-swirl duplex nozzle and ALR on the spray characteristics of Jet A-1 fuel were investigated.

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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 depending on the mission of the aircraft.

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  • Effect of Nozzle Type and Abrasive on Machinablity in ...

    Micro abrasive jet machining (MAJM) is a high effective economical technology for three dimensional micro structure fabrications of brittle materials. It is widely used in the fabrication of semiconductors, electronic devices, micro electro-mechanical systems (MEMS), optical-electronic and optical devices, and medical instruments. In this paper, based on the experimental study of MAJM for ...

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  • CFD Study of Effects of Geometry Variations on Flow in a ...

    2014-11-19 · AbstractReynolds-Averaged Navier-Stokes simulations have been performed to investigate the effect of nozzle geometry on the turbulence characteristics of incompressible fluid flow through nozzles at Reynolds number of approximately 50,000. Four nozzles have been considered: a baseline nozzle and three modified nozzles (extended, grooved and ringed).

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  • Numerical investigation of the effect of geometry on the ...

    2011-5-11 · Jet pump plays a major role in transporting materials. The efficiency of jet pump is poor and it usually has a sharp peak in the efficiency–discharge ratio curve. These are undesirable. In the past, experiments were conducted to understand the functioning of each component of the jet pump.

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  • The effect of air swirl profile on the instability of a ...

    E ect of air swirl pro le on viscous jet instability 3 Liquid r Swirling air x a 0 W g U g U l g Figure1.A liquid jet surrounded by swirling air. More importantly, the flow conditions considered in these studies are quite di erent from those involved in practical fuel injection processes of combustion engines, and air …

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  • Influence of liquid hydrophobicity and nozzle passage ...

    The nozzle aspect ratio has a more significant effect on the near-field jet stream characteristics for both fluids than the orifice inlet shape. Longer nozzles (l /d = 20) form more stable jet streams and delay the breakup of sheets, leading to greater breakup length than that attained with shorter nozzles (l /d = 5). For similar Reynolds ...

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  • Various Nozzle Designs Eff ect on the Polyproplene (PP ...

    2015-5-20 · workers focused on the influence of the ink-jet print head geometry, the diameter of the nozzle exit, amplitude and frequency of electrically driven signals, and liquid properties, density, viscosity and surface tension on the drop formation, but little is known about the effect of the wetting condition

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  • Impingement Jet Cooling Book - WIT Press

    2016-11-29 · plasma jet treatment induces 26o contact angle reduction using with N2 type nozzle with constant parameters. Maximum contact angle reduction obtained with the N1 type plasma nozzle. N3 type nozzle effect on surface contact angle value is between them. This change in water contact angle may be as a result of thermal oxidation caused to

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

    2014-8-7 · air from an air compressor is supplied to an air chamber, which has a fl ow strainer, through a pressure regulator and a heat exchanger for maintaining constant air jet temperature. The air jet is spouted from a round nozzle (D = 32 mm), the exit of which is orifi ce-shaped. The round nozzle generates an axisymmetric round jet

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  • Heat Transfer, Fluid Mechanics and Thermodynamics in ...

    2019-12-18 · when two tabs were located 180 deg apart at the jet nozzle exit. They also observed two high velocity cores on either side of the jet centerline on a plane normal to two tabs. For a subsonic jet, the effect of the tabs is much more pronounced than that produced by other mixing enhancement techniques such as periodic forcing.

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

    2016-4-8 · The effect that two different mesh grids have on the structure of the mixing layer of an axisymmetric jet was studied in the seventh paper. Detailed measurements of mean velocity and turbulent velocity fluctuations were made with a hot wire probe. The grids were introduced at two locations: one location just downstream of the nozzle exit plane ...

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  • A review on nozzle wear in abrasive water jet machining ...

    2021-3-16 · Yu et al. have performed Reynolds-averaged Navier–Stokes simulations to investigate the effect of nozzle geometry on the turbulence characteristics of incompressible fluid flow through nozzles at Reynolds number of approximately 50 000. Four nozzles have been considered: a baseline nozzle and three modified nozzles (extended, grooved and ringed).

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  • Simulation of Atmospheric Air Micro Plasma Jet for ...

    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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