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Evolution of a Planar Wake in Adverse Pressure GradientIn the interest of improving the predictability of high-lift systems at maximum lift conditions, a series of fundamental experiments were conducted to study the effects of adverse pressure gradient on a wake flow. Mean and fluctuating velocities were measured with a two-component laser-Doppler velocimeter. Data were obtained for several cases of adverse pressure gradient, producing flows ranging from no reversed flow to massively reversed flow. While the turbulent Reynolds stresses increase with increasing size of the reversed flow region, the gradient of Reynolds stress does not. Computations using various turbulence models were unable to reproduce the reversed flow.
Document ID
20160011108
Acquisition Source
Ames Research Center
Document Type
Technical Memorandum (TM)
Authors
Driver, David M. (NASA Ames Research Center Moffett Field, CA United States)
Mateer, George G. (MCAT Inst. Moffett Field, CA, United States)
Date Acquired
September 7, 2016
Publication Date
February 1, 2016
Subject Category
Aerodynamics
Report/Patent Number
ARC-E-DAA-TN29325
NASA/TM-2016-219068
Distribution Limits
Public
Copyright
Public Use Permitted.
Keywords
Wake
Turbulence
Separation

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