Dynamics of an impinging jet. Part 2. The noise generation

Author:

Nosseir Nagy S.,Ho Chih-Ming

Abstract

The aerodynamic noise generated by a subsonic jet impinging on a flat plate is studied from measurements of near-field and surface-pressure fluctuations. The far-field noise measured at 90° to the jet axis is found to be generated by two different physical mechanisms. One mechanism is the impinging of the large coherent structures on the plate, and the other is associated with the initial instability of the shear layer. These two sources of noise radiate to the far field via different acoustical paths.

Publisher

Cambridge University Press (CUP)

Subject

Mechanical Engineering,Mechanics of Materials,Condensed Matter Physics

Reference20 articles.

1. Browand, F. K. & Laufer, J. 1975 The role of large scale structures in the initial development of circular jets. In Proc. 4th Biennial Symp. on Turbulence in Liquids, University of Missouri-Rolla (ed. J. L. Zakin & G. K. Patterson ),pp.333–344.Science Press.

2. Lau, J. C. , Fisher, M. J. & Fuchs, H. V. 1972 The intrinsic structure of turbulent jets.J. Sound Vib. 22,379–406.

3. Williams, K. C. & Purdy, K. R. 1970 A prewhitening technique for recording acoustic turbulent flow data.Rev. Sci. Instrum. 41,1897–1899.

4. Tam, C. & Block, P. J. W. 1978 On the tones and pressure oscillations induced by flow over rectangular cavities.J. Fluid Mech. 89,373–399.

5. Michalke, A. 1972 Instabilität eines Kompressiblen runden freistrahls unter berücksichtigung des einflusses der strahlgrenzschicktdicke.Z. Flugwiss. 19,319–328.

Cited by 99 articles. 订阅此论文施引文献 订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献

同舟云学术

1.学者识别学者识别

2.学术分析学术分析

3.人才评估人才评估

"同舟云学术"是以全球学者为主线,采集、加工和组织学术论文而形成的新型学术文献查询和分析系统,可以对全球学者进行文献检索和人才价值评估。用户可以通过关注某些学科领域的顶尖人物而持续追踪该领域的学科进展和研究前沿。经过近期的数据扩容,当前同舟云学术共收录了国内外主流学术期刊6万余种,收集的期刊论文及会议论文总量共计约1.5亿篇,并以每天添加12000余篇中外论文的速度递增。我们也可以为用户提供个性化、定制化的学者数据。欢迎来电咨询!咨询电话:010-8811{复制后删除}0370

www.globalauthorid.com

TOP

Copyright © 2019-2024 北京同舟云网络信息技术有限公司
京公网安备11010802033243号  京ICP备18003416号-3