Acoustic sources in the low Mach number turbulent boundary layer
作者:
Jay C. Hardin,
期刊:
The Journal of the Acoustical Society of America
(AIP Available online 1991)
卷期:
Volume 90,
issue 2
页码: 1020-1031
ISSN:0001-4966
年代: 1991
DOI:10.1121/1.402290
出版商: Acoustical Society of America
关键词: BOUNDARY LAYERS;TURBULENT FLOW;NOISE;SOUND FIELDS;WAVE EQUATIONS;HYDRODYNAMICS
数据来源: AIP
摘要:
The sources of sound production in a low Mach number turbulent boundary layer are examined. The sources are shown to be quadrupole in nature and to result from supersonically convecting wave‐number components of the fluctuating Reynolds’ normal stresses. The primary Tollmien–Schlichting instability of the boundary layer is found to radiate no sound. Analysis of various vortical phenomena suggests that the primary source is the process of formation of horseshoe vortices, with viscous sublayer bursts a possible secondary source.
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