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

    Several different nozzles have been employed to investigate the influence of the nozzle geometry on the near-field structures of highly underexpanded sonic free jets. The results obtained show that the distance from the nozzle exit to the Mach disk is an increasing function of the jet–pressure ratio, which also significantly influences the ...

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

    2008-2-1 · Three different nozzle geometries have been employed to investigate the influence of the nozzle geometry on the near-field structure. Based upon the present computational results, the concept of an imaginary straight nozzle was introduced to take account of …

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  • Influence of nozzle lip geometry on the Strouhal number

    2020-4-1 · The influence of nozzle lip geometry on the Strouhal number of the self-excited waterjet is studied. Jets emanating from the self-excited nozzle with various lip parameters are investigated in a high pressure cell with Reynolds number 3 × 10 5 and 4 cavitation numbers (0.04, 0.06, 0.08, 0.1). Strouhal numbers are obtained from the pressure oscillation measured by a transducer.

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  • Influence of Nozzle Geometry on the Noise of High-Speed ...

    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) The effect of nozzle geometry on the flow ...

    A water jet is generated at the outlet of the nozzle (5) that strikes the target plate (6), which it located at a certain distance x in front of the nozzle. The jet (5) generates an impact force ...

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  • Influence of Nozzle geometry on spray shape, particle

    2021-7-13 · Influence of Nozzle Geometry on Spray Shape, Particle Size, Spray Velocity and Air Entrainment 389 Fig. 1. Silicone mould of injector Fig. 2. Nozzle with deflector The nozzle geometries and operation conditions have been chosen in order to obtain different cavitation levels.

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  • Effect of Nozzle Orifice Geometry | Argonne National ...

    2021-7-29 · Nozzle orifice geometry is known to influence the flow inside the nozzle, which in turn affects the spray development, thus impacting combustion and emission processes. In the past, modeling studies have focused on the influence of nozzle orifice geometry on the flow inside the orifice only. This is mainly due to the lack of a suitable primary breakup model.

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

    2019-2-1 · The geometry of converging-diverging nozzles affects the conditions at which critical-subcritical flow transition occurs. The objective of this work is to develop guidelines to identify the optimum nozzle geometry that maximizes critical pressure ratio while minimizing pressure drop across the nozzle.

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  • Numerical Analysis of the Impact of the Interior Nozzle ...

    2016-9-18 · Nozzle geometry and computational meshes. Figure 2 shows the interior of three variants of the engine nozzle, the clean nozzle h j 1, the centerbody nozzle h j 2, and the centerbody-plus-strut nozzle h j 3 which are identical except for the centerbody and the struts which support the centerbody. The geometric notations are given in Fig. 3.The nozzle expansion ratio R e /R i is 1.3125, where R ...

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  • A study of the micro-hole geometry evolution on glass by ...

    2018-1-1 · The features formed on the target material, such as groove width and depth, kerf geometry, hole shapes, surface integrity, etc., are a result of a combination of multiple impact of a number of particles through an abrasive-laden air jet ejected from a nozzle.

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  • Spray cone angle prediction model considering nozzle

    Abstract A wide variety of processes make use of plain orifice nozzles. Fuel injectors for internal combustion engines incorporate these nozzles to generate finely atomized sprays. Processes such as jet cutting, jet cleaning, and hydroentanglement, on the other hand, use similar nozzles, but require coherent jets. The spray or jet characteristics depend on the stability of the flow emerging ...

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  • Modeling the influence of the nozzle flow on diesel spray ...

    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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  • Spray cone angle prediction model considering nozzle

    Abstract A wide variety of processes make use of plain orifice nozzles. Fuel injectors for internal combustion engines incorporate these nozzles to generate finely atomized sprays. Processes such as jet cutting, jet cleaning, and hydroentanglement, on the other hand, use similar nozzles, but require coherent jets. The spray or jet characteristics depend on the stability of the flow emerging ...

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

    This paper reviews the investigations fluid flow through different nozzle geometry, and aimed to understand the effects of nozzle shapes on the flow characteristics. This work divided in two parts, experimental method and numerical method and both focused on flow of the nozzles. The experimental discus mainly on the influence of nozzle geometry and to compare their results with different ...

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  • NUMERICAL SIMULATION OF FLOW FIELD IN AIR-JET

    parameters (conicity and inlet edge rounding) on the jet spreading angle. From this background, a new model was developed to determine the spray cone angle of direct injection diesel engines, taking into account the actual nozzle design. The model distinguishes between three different effects of the nozzle geometry on the spray dispersion.

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  • Influence of liquid hydrophobicity and nozzle passage ...

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

    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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