Simultaneous wall-pressure and PIV measurements are used to study the conditional flow field associated with surface-pressure generation in a separating/reattaching flow established over a fence-with-splitter-plate geometry. The conditional flow field is captured using linear and quadratic stochastic estimation based on the occurrence of positive and negative pressure events in the vicinity of the mean reattachment location. The results shed light on the dominant flow structures associated with significant wall-pressure generation. Furthermore, analysis based on the individual terms in the stochastic estimation expansion shows that both the linear and non-linear flow sources of the coherent (conditional) velocity field are equally important contributors to the generation of the conditional surface pressure.
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ASME 2002 Joint U.S.-European Fluids Engineering Division Conference
July 14–18, 2002
Montreal, Quebec, Canada
Conference Sponsors:
- Fluids Engineering Division
ISBN:
0-7918-3616-9
PROCEEDINGS PAPER
Stochastic Estimation and Non-Linear Wall-Pressure Sources in a Separating/Reattaching Flow
A. Naguib,
A. Naguib
Michigan State University, East Lansing, MI
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L. Hudy,
L. Hudy
Michigan State University, East Lansing, MI
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W. M. Humphreys, Jr.
W. M. Humphreys, Jr.
NASA Langley Research Center, Hampton, VA
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A. Naguib
Michigan State University, East Lansing, MI
L. Hudy
Michigan State University, East Lansing, MI
W. M. Humphreys, Jr.
NASA Langley Research Center, Hampton, VA
Paper No:
FEDSM2002-31418, pp. 1211-1216; 6 pages
Published Online:
February 24, 2009
Citation
Naguib, A, Hudy, L, & Humphreys, WM, Jr. "Stochastic Estimation and Non-Linear Wall-Pressure Sources in a Separating/Reattaching Flow." Proceedings of the ASME 2002 Joint U.S.-European Fluids Engineering Division Conference. Volume 2: Symposia and General Papers, Parts A and B. Montreal, Quebec, Canada. July 14–18, 2002. pp. 1211-1216. ASME. https://doi.org/10.1115/FEDSM2002-31418
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