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Thursday, July 30, 2020 | History

2 edition of An investigation of an air ejector with supersonic primary flow and subsonic secondary flow found in the catalog.

An investigation of an air ejector with supersonic primary flow and subsonic secondary flow

by William John Keim

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  • 2 Currently reading

Published by Rensselaer Polytechnic Institute .
Written in English

    Subjects:
  • Aeronautics

  • Edition Notes

    Statementby William J. Keim and Lewis A. Hopkins
    ContributionsHopkins, Lewis Alexander
    ID Numbers
    Open LibraryOL24780245M

      AbstractAs per few investigation in installed performance for variable cycle engines, an analysis scheme is proposed on the basis of integrating variable cycle engine and supersonic inlet system model. An integrated mathematical model, containing the inlet and the variable cycle engine is built, realizing the simulation of influences on the installation performance by varying geometry ?.   () Prediction of turbulent particle-laden flow in horizontal smooth and rough pipes inducing secondary flow. International Journal of Multiphase F () Using computational modeling to enhance the understanding of the flow of supercritical carbon dioxide in wood ://?journalCode=sjnaam.

    SPIE Digital Library Proceedings. Proc. SPIE , XV International Symposium on Gas Flow, Chemical Lasers, and High-Power Lasers, pg (23 March ); doi: /   AbstractControl of Mach elliptic jet with ventilated triangular tabs is studied experimentally, in the presence of different levels of pressure gradient at the nozzle exit. Three different sets of ventilated tabs with circular, triangular and trapezoidal ventilations were studied. Two tabs were placed, at the ends of major and minor axes, at the exit of the elliptic nozzle of aspect ratio

    Stefan Felder and Hubert Chanson, Air–water flow characteristics in high-velocity free-surface flows with 50% void fraction, International Journal of Multiphase Flow, 85, (), (). Crossref Z. Jávor, N. Schreithofer and K. Heiskanen, Multi-scale analysis of the effect of surfactants on bubble properties, Minerals Engineering, 99   为大人带来形象的羊生肖故事来历


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An investigation of an air ejector with supersonic primary flow and subsonic secondary flow by William John Keim Download PDF EPUB FB2

Generally, there is a blower or an ejector in a hydrogen recirculation system [, ].Compared with hydrogen blowers, ejectors have advantages of small volume, no parasitic power consumption, low cost, no noise and no vibration during operation [, ].Fig.

1 shows a simplified hydrogen recirculation system with an ejector. In this system, the primary gas flows into the ejector when its An experimental study has been carried out on the mixing characteristics of a two dimensional supersonic ejector with a supersonic primary flow (air) of Mach number and the secondary flow Supersonic ejectors are simple mechanical devices (Fig.

1(a)), which can be used to pump and compress a given flow without any moving the primary (1) (Fig. 1(a)) supersonic jet is discharged, by an entrainment-induced effect the secondary stream (2) (Fig.

1(a)) is drawn into the ejector and eventually compressed to the back pressure (b) (Fig. 1(a)). Request PDF | Mixing in a Supersonic Ejector - An Experimental Investigation | A supersonic ejector utilizes the energy and momentum of a primary motive jet to entrain and compress a secondary co Supersonic ejectors are used extensively in all kind of applications: compression of refrigerants in cooling systems, pumping of volatile fluids or in vacuum generation.

In vacuum generation, also known as zero-secondary flow, the ejector has a transient behaviour. In this paper, a numerical and experimental research of a supersonic compressible air nozzle is performed in order to investigate The first region depicts the wall boundary layer, jet shear layer, and secondary and primary potential flows.

The second one contains a single region of developing flow. A simple ejector with convergent-divergent primary nozzle was fabricated and experimentally :// A miniature steam ejector refrigeration system embedded with a capillary pump loop can result in a compact design which can be used for electronics cooling.

In this paper, computational fluid dynamics (CFD) is employed to investigate the effects of the area ratio of the ejector constant-area mixing section to the nozzle throat, the length of the constant-area section, and the nozzle exit A supersonic ejector is an apt device for recirculation in the operating regimes of a hydrogen fuel cell.

Optimal ejectors have to be designed to achieve best performances. The use of the vector evaluated particle swarm optimization technique to optimize supersonic ejectors with a focus on its application for hydrogen recirculation in fuel   fixed geometry ejector, assuming ideal ejector pumping, will limit secondary air flow rate to achieve supersonic mixing and combustion in the ejector.

QVERALL APPROACH ALS type vehicle and flight trajectory is used to determine an ejector geometr2," that provides significant thrust increase for a single Space Transportation Main Engine (STME). PRESSURE MEASUREMENT AND FLOWFIELD CHARACTERIZATION OF A TWO-DIMENSIONAL, IDEALLY EXPANDED, CONSTANT AREA, AIR/AIR EJECTOR By Michael Anthony Benjamin December Chairman: Vernon P.

Roan Major Department: Mechanical Engineering A detailed experimental investigation of a two-dimensional, Mach air-primary, a steam ejector consists of four principal parts the primary nozzle, the mixing chamber, the ejector throat and the subsonic diffuser.

High pressure primary fluid(P) expands and accelerates through the primary nozzle, it fans out with super- sonic speed to create a very low pressure region at the nozzle exit plane and hence in the mixing Description: Performance Improvement of Forced Draught Jet Ejector Using Constant Rate Momentum Change Method DE for 0 x L (2) (- C) D 1 LD Like this book.

You can publish your book online for free in a few minutes. American Institute of Aeronautics and Astronautics Sunrise Valley Drive, Suite Reston, VA   Technologies for jet noise reduction in turbofan engines. Link/Page Citation Mixing secondary air with the primary exhaust reduces the velocity of the faster of the flows so Mach wave radiation can be reduced by surrounding the primary jet with secondary flow so that the primary eddies become subsonic with respect to the secondary flow +for+jet+noise+reduction+in+turbofan.

Investigation of plasma-generated jets for supersonic flow control Narayanaswamy, V. / Shin, J. / Clemens, N. / Raja, L. / American Institute of Aeronautics and Astronautics | print version:CN/CFD-Prediction-of-Magnus-Effect-in.

A propelling nozzle is a nozzle that converts the internal energy of a working gas into propulsive force; it is the nozzle, which forms a jet, that separates a gas turbine, being gas generator, from a jet engine. Propelling nozzles accelerate the available gas to subsonic, transonic, or supersonic velocities depending on the power setting of the engine, their internal shape and the pressures Primary/Secondary Flow Mixing Characteristics in the RBCC Flowpath.

Jianxiong Qu, Feiteng Luo, Yufei Slot Injection of Hydrogen into a Supersonic Air Flow. Mengmeng Zhao, David R. Buttsworth, Rishabh Choudhury, Ray Malpress Studies on the Double-Solution Problem of the Mach Number at the Mixer Outlet of the Supersonic Ejector.

Lin Qi   The secondary or final nozzle was a fixed geometry sized for the maximum afterburner case. At non-afterburner thrust settings the exit area was too big for the closed engine nozzle giving over-expansion.

Free-floating doors were added to the ejector allowing secondary air to control the primary Workshop 1 – Physics-Based Modeling of Gas Turbine Secondary Air Systems, Workshop 2 – Advanced Diagnostics: New Surface Temperature Mapping Techniques for Turbo Machinery Workshop 3 – Gas Turbine Engine Aerothermodynamics and Performance Calculations: Workshop 4 – Primer on Gas Turbine Power Augmentation Technologies (1)/Workshops.

Evaluation of steam jet ejectors 1. Chemical Engineering and Processing 41 () – Evaluation of steam jet ejectors Hisham El-Dessouky *, Hisham Ettouney, Imad Alatiqi, Ghada Al-Nuwaibit Department of Chemical Engineering, College of Engineering and Petroleum, Kuwait Uni6ersity, P.O. BoxSafatKuwait Received 4 April ; received in revised form 26 September.

Investigation of the Unsteady Flow in an Counter-Rotating Compressor Using the Nonlinear Harmonic Method Liu, B. / Wang, L. / Wang, Q. / Xiang, X. | print version:CN/Optimization-and-Examination-of-a. The secondary or final nozzle was a fixed geometry sized for the maximum AB case.

At non-AB thrust settings the exit area was too big for the closed engine nozzle giving over-expansion. Free-floating doors were added to the ejector allowing secondary air to control the primary jet expansion. Reasons for C-D nozzle underexpansion and examplesThis banner text can have markup.

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