A near‐wake model for the aerodynamic pressures exerted on singing trailing edges
作者:
William K. Blake,
期刊:
The Journal of the Acoustical Society of America
(AIP Available online 1976)
卷期:
Volume 60,
issue 3
页码: 594-598
ISSN:0001-4966
年代: 1976
DOI:10.1121/1.381133
出版商: Acoustical Society of America
关键词: 2865;5055
数据来源: AIP
摘要:
Periodic vortex streets are formed in the wakes of blunted trailing edges on airfoils and struts. The pressures generated on the shedding struts by the vortices in these wakes are periodic in time with a frequency that is set by the shedding rate for the vortices. A simple analytical formulation is derived to relate wake‐induced pressures to the characteristics of the wake near the edge. The chordwise distribution and magnitude of the pressure is shown as a function of the circulation of shed vortices, as well as the formation distance and the spacing of the vortices in the street. Predictions from the theory are compared to some recent measurements which were obtained in the wakes downstream of different trailing edges. These measurements were made at Reynolds numbers, based on trailing edge thickness, on the order of 104to 105.Subject Classification: [43]28.65; [43]50.55.
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