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Wall-Pressure-Array Measurements Beneath a Separating/Reattaching Flow RegionA database of wall-pressure array measurements was compiled for studying the space-time character of the surface-pressure field within a separating/reattaching flow region. The experimental setup consisted of a long splitter plate instrumented with an array of 80 flush-mounted microphones located within the wake of a fence. Data were acquired for a Reynolds number of 7885, based on the fence height. Two distinctive regions, defined based on their location relative to the position of the mean reattachment point (x(sub r)) of the shear layer, emerged from this investigation. Upstream, from the fence to 1/4x(sub r), the surface-pressure signature was dominated by large time scale disturbances and an upstream convecting velocity of 0.21U(sub infinity). Beyond 1/4x(sub r), turbulent structures with small time scales and a downstream convection velocity of 0.57U(sub infinity) generated most of the pressure fluctuations. There was evidence that these structures began to form around 1/4x(sub r) and grew in strength and size with downstream distance before reattaching on the plate. Only the time-averaged results from the microphones have been examined hitherto and will be presented.
Document ID
Document Type
Hudy, Laura M.
(Michigan State Univ. East Lansing, MI United States)
Naguib, Ahmed M.
(Michigan State Univ. East Lansing, MI United States)
Humphreys, William M., Jr.
(NASA Langley Research Center Hampton, VA United States)
Bartram, Scott M.
(NASA Langley Research Center Hampton, VA United States)
Date Acquired
September 7, 2013
Publication Date
January 1, 2002
Subject Category
Fluid Mechanics And Thermodynamics
Report/Patent Number
AIAA Paper 2002-0579
Meeting Information
Meeting: 40th Aerospace Sciences Meeting and Exhibit
Location: Reno, NV
Country: United States
Start Date: January 14, 2002
End Date: January 17, 2002
Sponsors: American Inst. of Aeronautics and Astronautics
Distribution Limits
Public Use Permitted.
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