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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 Performance

    2020-4-22 · determine the effect of air inlet angle are inconclusive and require further investigation. 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

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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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  • Effect of nozzle geometry on heat transfer characteristics ...

    Request PDF | Effect of nozzle geometry on heat transfer characteristics from a single circular air jet | The paper reports results on the effects of nozzle geometry on local and average heat ...

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

    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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  • 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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  • Effect of Axisymmetric Sonic Nozzle Geometry on ...

    The effect of nozzle geometry on sonic line and characteristics of supersonic air jet was studied. Computational fluid dynamics was applied in this study.

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  • Effects of nozzle geometry on parallel injection into a ...

    2019-12-18 · into the jet flow with an angle of 135 deg from the nozzle wall, the angle shown to have the greatest mixing effect.17 The elliptic nozzle had a semimajor axis of 6.15 mm and a semiminor axis of 2.05 mm, resulting in an AR of 3:1 and an equivalent diameter of 3.55 mm for a circular nozzle of the same cross-sectional area.

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  • Effects of nozzle-inlet chamfering on pressure drop and ...

    The effect of changing the nozzle geometry on the pressure drop and local heat transfer distribution in confined air jet impingement on a small heat source was experimentally investigated.

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  • Effect of injector geometry on the performance of an ...

    2010-11-1 · The air injection holes were provided circumferentially along two rows, 3 mm apart, as shown in Fig. 1. Several injectors, with different geometry, were fabricated and tested to study the effect of injector geometry on the performance of the injector. The geometric details of the injectors investigated in this study are presented in Table 1.

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  • EFFECT OF NOZZLE GEOMETRY ON THE EFFICIENCY OF

    2016-7-19 · a stepped nozzle (Figure 1), a straight pipe, a converging-diverging nozzle (Figure 3) and an energy-efficient nozzle (Figure 4). The energy efficient nozzle is a combination of a stepped nozzle and a diverging part connected at the back. This geometry permits the surrounding air to be entrained. NOMENCLATURE

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

    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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  • The Effect of Nozzle Geometry on Pressure Drop and Heat ...

    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 …

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  • Nozzle-geometry effects in liquid jet impingement heat ...

    1996-9-1 · Experiments were conducted to determine the effect of nozzle geometry (diameter and aspect ratio) on the local heat transfer coefficients from a small heat source to a normally impinging, axisymmetric, submerged and confined liquid jet of FC-77. A single jet with nozzle diameters in the range of 0.79–6.35 mm and up to seven different nozzle ...

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  • Nozzle geometry variations on the discharge coefficient ...

    2016-3-1 · Based upon the computed results, the nozzle geometry has significant influences on the discharge coefficient, profile of sonic lines and on the nozzle downstream flow features. Jet boundaries, shear layers and lengths of supersonic core of jets were investigated to clarify the performance of nozzles on the downstream flows. 2.

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  • Influence of nozzle geometry on the near-field structure ...

    2008-2-1 · Addy (1981) carried out several experiments using different nozzle geometries to investigate the effects of this on the Mach disk of highly underexpanded sonic free jets. In the present study, the three types of nozzles previously employed in Addy's work have been adopted, as shown schematically in Fig. 3.N1 is a cylindrical straight nozzle of exit diameter D e and radius …

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  • (PDF) Impact of Process Parameters and Nozzle Design on ...

    2.2.5.3 Core and effect air-jet textured yarns Multiple ends overfed into a texturing nozzle at different speeds constitute the core and effect textured yarns. Core component is usually fed at a slower speed than the effect yarn. The versatility of the air-jet texturing process is best observed by the core-effect operation.

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

    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 …

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

    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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  • The effect of frontal nozzle geometry and gas pressure on ...

    Abstract Wire arc spraying arc is a deposition procedure in which coating characteristics can be controlled by optimizing the spraying nozzle geometry or the process parameters. This paper presents the effect of spraying nozzle geometry (and dynamic of gases) on the properties of steel coatings. For this purpose, a spraying gun in electric arc with two wires was used, provided with …

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  • 7 3 33742 - ntrs.nasa.gov

    2020-8-6 · effects on jet exhaust noise due to a wing are made for the various nozzle geometries tested. APPARATUS Acoustic Test Stand Free jet.- An outdoor 13-inch diameter free jet (fig- 3) was used to simulate forward velocity. For this rig, dry cold air (at about 520° R) was supplied to a 16-inch diameter gate valve from the Center's 125 psig air ...

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  • I NASA

    2020-8-6 · Details of the convergent nozzle geometry and location are shown in fig- ure 6, where the subscripts 1 and 2 refer to nozzles 1 and 2, respectively. Each nozzle was made of 0.953-cm-diameter stainless-steel tubing, whose inner diameter converged from 0.775 cm to the diameter dl or d2 of the circular

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  • Journal of Fluid Vol. 6, No. 4, 2011 Science and Technology

    δ : Jet width ρ : Density of air λa: Thermal conductivity of air ν : Kinetic viscosity 2. Nozzle geometry and measurement techniques A schematic diagram of the nozzle geometry is shown in Fig. 2. Air supplied by a blower ejects from the nozzle into the ambient still air after the flow rate is controlled using a valve with an inverter.

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  • Coanda effect in valves - pdfs.semanticscholar.org

    2017-12-22 · Coanda effect in some special cases which could occur in valves. 2 Coanda effect The Coanda effect is a phenomenon that was first observed in 1910 by Romanian mathematician and engineer Henri Coanda. He discovered that when air was ejected from a rectangular nozzle, it would attach itself to an inclined flat plate connected to the nozzle exit.

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  • Breakup Mechanisms of Brittle Deposits in RB–A Fundamental ...

    2016-8-9 · In this study the breakup process of model brittle deposits impinged by an air jet was examined using an experimental setup shown schematically in Figure 1. The air jet nozzle was a ¼ scaled-down version of an actual sootblower nozzle. It had a throat diameter of 0.45 cm and exit diameter of 0.74 cm, and was designed to be

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  • Application of Laser Diagnostics to a Green Manufacturing ...

    2013-3-27 · scale model. Specifically, the objective is to quantify the turbulence intensity present in the air jet at the nozzle exit and downstream. In addition to serving as boundary conditions for the large-scale model, these experimentally measured quantities provide significant insight into the dynamics of jets produced with different geometry nozzles.

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  • ALPINE AIR JET SIEVE e200 LS - Hosokawa Alpine

    2021-5-18 · sieve, the air jet sieve is the device of choice for sieving fine powders. This is where the air jet sieve e200 LS develops maximum effectiveness. Not just one, but two compo-nents work together here: a slotted nozzle which rotates inside the sieving chamber and an industrial vacuum cleaner connected up to the sieving chamber.

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  • orte Field soclate a in a Cross Low mpmgmg on a ane ,rm a ar

    2020-3-17 · ratios and for the larger nozzle, where tunnel blockage became significant. Variation of observed ground vortex size with cross flow-to-jet velocity ratio was consistent with previous studies. Observed effects of jet size and ground plane-to-jet board spacing were relatively small. Jet exit turbulence level effects were also small.

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  • Acoustic Study of a Sweeping Jet Actuator for Active Flow ...

    2019-9-26 · mounted on a wall plate tangent to the inner surface of a 4 in. x 10 in. (10.16 x 25.4 cm.) nozzle exhausting into the Ames Experimental Aero-physics branch anechoic chamber, as shown in Fig. 3. The actuator exits were located 13 in. (33 cm.) downstream of the nozzle exit where the boundary layer thickness of the wall jet measured about 0.5”

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  • G3- Solved Problems

    2010-1-28 · Air jet h (W/m2.K) V (m/s) The suggested out put chart: Shows the effect of jet air velocities on heat transfer coefficients. 5. An instrumentation package has a spherical outer surface of diameter D = 100 mm and emissivity ε = 0.25. The package is placed in a large space simulation chamber whose walls are maintained at 77 K.

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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 ...

    Get Price
  • Effect of Nozzle Geometry on Air-Jet Texturing Performance

    2020-4-22 · determine the effect of air inlet angle are inconclusive and require further investigation. 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

    Get Price
  • (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 …

    Get Price
  • Effect of nozzle geometry on heat transfer characteristics ...

    Request PDF | Effect of nozzle geometry on heat transfer characteristics from a single circular air jet | The paper reports results on the effects of nozzle geometry on local and average heat ...

    Get Price
  • (PDF) Effect of nozzle geometry on pressure drop and heat ...

    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 …

    Get Price
  • 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.

    Get Price
  • Effect of Axisymmetric Sonic Nozzle Geometry on ...

    The effect of nozzle geometry on sonic line and characteristics of supersonic air jet was studied. Computational fluid dynamics was applied in this study.

    Get Price
  • Effects of nozzle geometry on parallel injection into a ...

    2019-12-18 · into the jet flow with an angle of 135 deg from the nozzle wall, the angle shown to have the greatest mixing effect.17 The elliptic nozzle had a semimajor axis of 6.15 mm and a semiminor axis of 2.05 mm, resulting in an AR of 3:1 and an equivalent diameter of 3.55 mm for a circular nozzle of the same cross-sectional area.

    Get Price
  • Effects of nozzle-inlet chamfering on pressure drop and ...

    The effect of changing the nozzle geometry on the pressure drop and local heat transfer distribution in confined air jet impingement on a small heat source was experimentally investigated.

    Get Price
  • Effect of injector geometry on the performance of an ...

    2010-11-1 · The air injection holes were provided circumferentially along two rows, 3 mm apart, as shown in Fig. 1. Several injectors, with different geometry, were fabricated and tested to study the effect of injector geometry on the performance of the injector. The geometric details of the injectors investigated in this study are presented in Table 1.

    Get Price
  • Impact of Jet Reynolds Number and Feed Channel Geometry

    2011-5-9 · the effect of inclination of an impinging air jet on heat transfer characteristics. Roy and Patel [7] studied the effect of jet angle impingement on local Nu and nozzle to target plane spacing at different Re. Ekkad et al [8] studied the effect of impinging jet angle ±45 on target surface by using transient liquid crystal

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  • An explanation of the turbulent round-jet/plane-jet ...

    2012-5-17 · The effect of nozzle geometry on the turbulence evolution in an axisymmetric jet flow: A focus on fractals Physica A: Statistical Mechanics and its Applications, Vol. 550 CFD modelling of underexpanded hydrogen jets exiting rectangular shaped openings

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  • EXPERIMENTAL STUDY OF JET-FORMED HYDROGEN-AIR

    2016-12-2 · parameters were varied: mass flow rate, jet nozzle diameter (to alter gas speed) and geometry of the hood located on top of the jet. The carried out experiments provided data on detailed structure for under-expanded horizontal and buoyant vertical jets and data on pressure loads resulted from deflagration of various mixtures formed by jet releases.

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  • EXPERIMENTAL AND NUMERICAL CHARACTERIZATION OF

    2018-7-5 · ranging from 1 to 20 MPa [3]. The fuel/air mixture distribution is the result of complex interactions between the emerging fuel spray, in-cylinder flow field and the combustion chamber geometry [4]. Hence, experimental and numerical investigations are needed to evaluate how the spray evolution is influenced by nozzle design and spray targeting

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  • Air Curtain Design - Bureau of Safety and Environmental ...

    2017-7-14 · An air bubble curtain is developed by forcing air from a manifold through nozzles. The air exits as a buoyant jet into the sea water, but within a short distance, the jet momentum is dissipated, and further motion is controlled by buoyancy. The rising stream of air is broken into bubbles by the turbulence caused

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  • Cleaning Nozzles, Accessories and Application Information ...

    2021-1-18 · Lechler nozzles for container and tank cleaning 4–7 Tank- and outside cleaning of sprayers 8–9 Different ways of spray tank cleaning in comparison 10–11 Products High-pressure cleaning nozzles 12 Injector agitator nozzles 13 Cleaning nozzle for …

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  • AIAA Journal

    Abstract. Volumetric measurements of the flow within four cavities were made by scanning stereoscopic particle image velocimetry at a freestream Mach number of 0.8. The cavities have a length-to-depth ratio L/D=7, and a width-to-length ratio b/L=0.5.

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  • ISABE 2003-1119 A. Mohamed A. Hamed T. Lehnig Vice ...

    2019-3-9 · axial distance in terms of the jet aspect ratio (AR), jet Mach number, and jet to ambient temperature ratio. The correlations were compared to the data for AR 6 rectangular jets at 0.784 Mach number and for a heated Mach 1.045 jet. He gave a different set of correlations in each of the three jet regions, namely, the initial mixing

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  • EFFECT OF AN EXTERNAL FLOW ON COMBUSTION IN A

    2012-10-27 · calculations of a free jet of air (Re j = 3540) issuing into a quiescent air. As shown in Figure 2, for the configuration without an external cross-flow or co-flow, the axisymmetric assumption does not have a significant effect on the accuracy of the predictions. The rate of decay of the jet‟s centreline velocity in the

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  • Fabrication of nanofiber meltblown membranes and their ...

    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 Shambaugh [24–26].

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