Numerical Study of Oscillation Mechanism in Underexpanded Jet Impinging on Plate-Reference-Cited by-同舟云学术

Numerical Study of Oscillation Mechanism in Underexpanded Jet Impinging on Plate

Published:1998-09-01 Issue:3 Volume:120 Page:477-481
ISSN:0098-2202
Container-title:Journal of Fluids Engineering
language:en
Short-container-title:

Author:

Sakakibara Y.¹,Iwamoto J.²

Affiliation:

1. Department of Industrial & Mechanical Engineering, Tokyo Denki University, Ishizaka, Hatoyama-machi, Hiki-gun, Saitama-ken 350-0394, Japan

2. Department of Mechanical Engineering, Tokyo Denki University, 2-2 Nishiki-cho, Kanda, Chiyoda-ku, Tokyo 101-8457, Japan

Abstract

The mechanism of the oscillatory phenomena of an underexpanded jet impinging on a flat plate is studied numerically. Pressure changes generated in the flow field near the plate propagate radially in the surrounding region of the jet. The configuration of the jet boundary is changed by them and so, the waves forming the underexpanded jet are displaced when they are reflected from the jet boundary. And then, the pressure disturbances return to the region near the plate. Unsteady flow with repetition of growth and decay of the separation bubble on the plate is also found under certain conditions.

Publisher

ASME International

Subject

Mechanical Engineering

Link

http://asmedigitalcollection.asme.org/fluidsengineering/article-pdf/120/3/477/5900619/477_1.pdf

Reference10 articles.

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3. Kashimura H. , and YasunobuT., 1991, “Visualization of Self Induced Flow Oscillation in an Underexpanded Sonic Jet,” Journal of the Visualization Society of Japan, Vol. 11, No. 2, pp. 31–34 (in Japanese).

4. Kliegel J. R. , and LevineJ. N., 1969, “Transonic Flow in Small Throat Radius of Curvature Nozzle,” AIAA Journal, Vol. 7, No. 7, pp. 1375–1378.

5. Powell A. , 1994, “The Sound-producing Oscillations of Round Underexpanded Jets Impinging on Normal Plates,” Journal of Acoustical Society of America, Vol. 83(2), pp. 515–533.

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