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The Wall Interference of a Wind Tunnel of Elliptic Cross Section (1944)

Sanuki, Matao ; Tani, Itiro

In: CASI

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Publication Date: 2019-07-13

Description: The wall interference is obtained for a wind tunnel of elliptic section for the two cases of closed and open working sections. The approximate and exact methods used gave results in practically good agreement. Corresponding to the result given by Glauert for the case of the closed rectangular section, the interference is found to be a minimum for a ratio of minor to major axis of 1:square root of 6 This, however, is true only for the case where the span of the airfoil is small in comparison with the width of the tunnel. For a longer airfoil the favorable ellipse is flatter. In the case of the open working section the circular shape gives the minimum interference.

Keywords: Aerodynamics

Type: NACA-TM-1075 , Journal of the Society of Mechanical Engineers; 36; 190; 123-127

Format: application/pdf

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