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Friday, May 8, 2020 | History

3 edition of Coaxial injector spray characterization using water/air as stimulants found in the catalog.

Coaxial injector spray characterization using water/air as stimulants

Coaxial injector spray characterization using water/air as stimulants

  • 233 Want to read
  • 31 Currently reading

Published by National Aeronautics and Space Administration, For sale by the National Technical Information Service in [Washington, DC], [Springfield, Va .
Written in English

    Subjects:
  • Liquid propellant rockets -- Fuel systems.

  • Edition Notes

    StatementMichelle M. Zaller and Mark D. Klem.
    SeriesNASA technical memorandum -- 105322.
    ContributionsKlem, Mark D., United States. National Aeronautics and Space Administration.
    The Physical Object
    FormatMicroform
    Pagination1 v.
    ID Numbers
    Open LibraryOL15358726M

    Fuel injectors are used in the automotive industry and aerospace industry to control the volume of fuel injected into an engine’s combustion chamber. The amount of fuel is controlled by the valve opening time. This is typically between and 10ms, which can make spray droplet size measurements challenging. Diesel Spray Behaviour and Air Entrainment Arai M* Department of Mechanical Engineering, Graduate School of Engineering, Tokyo Denki University, Japan *Corresponding author: Arai M, Department of Mechanical Engineering, Graduate School of Engineering, Tokyo Denki University, 5 Senju-Asahi-sho, Adachi-ku Tokyo, , Japan, Tel:

    Drop size is an important factor in applications such as gas cooling, gas conditioning, fire suppression, spray drying, tablet coating, agricultural spraying and others. Read more > Spray Characterization Parameters. There are many parameters that can/should be used to characterize a spray, such as: • Droplet Size • Droplet Velocity. Numerical Modelling of Diesel Spray Injection, Turbulence Interaction and Combustion Fabian Peng K arrholm The image on the cover of the thesis is an illustrative image of a lagrangian spray, evaporation has been turned o to improve the visual experience. c Fabian Peng K arrholm, Doktorsavhandling vid Chalmers Tekniska Hogsk ola First edition.

    Spray characterization of Straight Vegetable Oils at High Injection Pressures Deshmukh D.a,, Madan Mohan A. a, Anand T.N.C.b, Ravikrishna R.V. aCombustion and Spray Laboratory, Dept. of Mechanical Engineering, Indian Institute of Science, Bangalore, India bDept. of Mechanical Engineering, Indian Institute of Technology Madras, Chennai, India Abstract We present results of high pressure spray. American Institute of Aeronautics and Astronautics Sunrise Valley Drive, Suite Reston, VA


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Coaxial injector spray characterization using water/air as stimulants Download PDF EPUB FB2

Get this from a library. Coaxial injector spray characterization using water/air as stimulants. [Michelle M Zaller; Mark D Klem; United States.

National Aeronautics and Space Administration.]. Zaller M. M., and Klem M. D.,“Coaxial Injector Spray Characterization Using Water/Air as Simulants,” Presented at the 28th JANNAF Combustion Meeting, San Antonio, by: To investigate the effect of recess on the spray characteristics of gas-liquid coaxial swirl injector, three different flowing models of recessed mixing chamber were built, and the effects of.

Cold flow experiments on the liquid sheet breakup were carried out by employing custom fabricated gas-centered swirl coaxial atomizers using water and air as experimental fluids. The experimental methodology to perform droplet size distribution of Liquid Centered Swirl-Coaxial injector (LCSC) using simultaneous Planar Laser-Induced Fluorescence (PLIF) technique and MIE scattering is demonstrated.

The fluid used for spray characterization is water with required quantities of the organic dye Rhodamine 6 g for PLIF : Kamalakannan Kannaiyan, Aravind Vaidyanathan. The coaxial porous injector discharged a gas jet in a direction normal to the center liquid core, and it was surmised that the momentum transfer from the radial gas jet to the axial liquid jet.

Characterization of Cryogenic Flow and Atomization from a Coaxial Rocket Injector Conference Paper July with 7 Reads How we measure 'reads'.

Further, both water supply systems have a rated maximum pressure of approximately MPa ( psia). The liquid-liquid coaxial swirl injector is mounted on a three-axis traverse system for precise Coaxial injector spray characterization using water/air as stimulants book in the horizontal as well as vertical planes with the injector orifice being pointed downwards.

In addition, the water spray is injected. Spray characterization of an air-assist pressure-swirl atomizer injecting high-viscosity Jatropha oils. normally un-atomized gel propellant jet with the conventional air-assist atomizer could be fully atomized by employing air injection at the converging section of the fuel nozzle due to a decreased viscosity at the converging section.

water mist sprays, while Zhu and Chigier [21] have discussed a method to process data related to sprays. Optical techniques has been applied to spray characterization by Yule et al. [22], Corcoran et al. [23] and Gemci et al. [24]. Drop-size measurements have been coupled to mass-flux-distribution.

William E. Anderson and Vigor Yang, Fundamental Mechanisms of Combustion Instabilities: Shear Coaxial Injector Spray Characterization, Liquid Rocket Engine Combustion Instability, /, (), (). The spray morphology of gas-liquid swirl coaxial injector is greatly influenced by the self-pulsation.

The stable spray has a cone shape, while the self-pulsated spray looks like a Christmas tree. In bipropellant thruster, fuel and oxidizer are injected into the combustion chamber separately by two coaxial injectors. As shown in Fig. 1, the inner injector has two twisty slots while the outer injector has three twisty the injection process, propellant flows through the twisty slot, thus tangential velocity is endued to the fluid in orifice and spray cone emerges due to the.

Spray characteristics of gas-centered swirl coaxial injectors, which are commonly used in staged combustion cycle engines, are investigated numerically and experimentally. The spray angle and the spreading angle are the quantitative parameters selected.

Cold flow experiments on the liquid sheet breakup were carried out by employing custom fabricated gas-centered swirl coaxial atomizers using water and air as experimental fluids.

Photographic techniques were employed to capture the flow behavior of liquid sheets at different flow conditions.

An experimental study has been conducted on the effect of high back pressure on the spray characteristics of a plain jet injector under coaxial high velocity air flow.

The air pressures tested range from 1 to 16 atm, the range of air velocity is 60– m/s, the pressure drops of injector tested are – kpa. Working fluid is water.

The flow characteristics of swirl (centrifugal) spray pressure nozzles with low viscosity liquids. Norman Dombrowski. Imperial College, London, England. Search for more papers by this author. David Hasson. Imperial College, London, England.

Interaction between two conical sheets of liquid formed by a coaxial swirl injector has been studied using water in the annular orifice and potassium permanganate solution in the inner orifice.

Experiments using photographic techniques have been conducted to study the influence of the inner jet on outer conical sheet spray characteristics such. Near-nozzle microscopic characterization of diesel spray under cold start conditions with split injection strategy.

The temperature of the ice–water mixture ranged from 0 to 1 °C during the tests, keeping nearly constant for up to 5 h because of the high heat capacity of water and ice. only leaving injector tip exposed in the air. An optical-based experimental study of the injector deposit effect on a multi-hole GDI injector was performed first.

After carefully calibrating the spray model with the experiment data, a three-dimensional computational fluid dynamics (CFD) simulation was then carried out to study the deposit effect on the air/fuel mixture preparation process in an optical research GDI engine.

A multihole injector with six injection holes and 60° spray cone angle is used for this purpose. High-speed Mie-scattering and high-speed Schlieren visualisations are used to characterise vapour penetration, liquid penetration, spray angle and .Experimental Cold Flow Characterization of a Swirl Coaxial Injector Element.

Chad Eberhart, David Lineberry and; Marlow Moser; LP Components: Injectors II • Tuesday, 04 August • hrs On the Effect of a Transverse Acoustic Field on a Flush Shear Coaxial Injector.

Jeffrey Graham, Ivett Leyva, Image Processing for Spray.The studied injector was an 8-hole degree arc injector. The spray with a 20 MPa injection pressure was injected into an ambient with a bar back pressure and a K temperature, though the fuel temperature is 90° C.

The total mass injected is .