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Design and calibration of slotted walls for transonic airfoil wind tunnels (1979)

Sewall, W. G. ; Barnwell, R. W. ; Everhart, J. L.

In: CASI

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Publication Date: 2016-06-07

Description: The traditional procedure for estimating the performance of slotted walls for airfoil wind tunnels is reviewed, and a modification which improves the accuracy of this procedure is described. Unlike the traditional procedure, the modified procedure indicates that the design of airfoil wind-tunnel walls which induce minimal blockage and streamline-curvature effects is feasible. The design and testing of such a slotted wall is described. It is shown experimentally that the presence of a model can affect the plenum pressure and thus make the use of the plenum pressure as a calibration reference questionable. Finally, an ONERA experiment which shows the effect of the sidewall boundary layer on the measured model normal force is discussed.

Keywords: AERODYNAMICS

Type: Advanced Technol. Airfoil Res., Vol. 1, Pt. 1; p 433-443

Format: application/pdf

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