Effect of sidewall suction on flow in two-dimensional wind tunnelsA closed-form analysis of flow in a two-dimensional subsonic wind tunnel which uses sidewall suction around the model to reduce sidewall boundary-layer effects is presented. The model problem which is treated involves a flat plate airfoil in a tunnel with a suction window shaped to permit an analytic solution. This solution shows that the lift coefficient depends explicitly on the porosity parameter of the suction window and implicitly on the suction pressure differential. For a given sidewall displacement thickness, the lift coefficient increases as the suction-window porosity decreases.
Document ID
19840035183
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Barnwell, R. W. (NASA Langley Research Center NTF Aerodynamics Branch, Hampton, VA, United States)