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On the numerical simulation of three-dimensional transonic flow with application to the C-141 wing (1973)

Ballhaus, W. F. ; Lomax, H. ; Bailey, F. R.

In: CASI

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Publication Date: 2019-06-27

Description: Results computed by a finite-difference, relaxation algorithm are presented for the supercritical flow (M = 0.825) about the C-141 airplane wing, which has sweep, taper, and twist. Comparisons with both wind-tunnel and flight data indicate that computed solutions of the classical transonic small disturbance equation can accurately simulate high Reynolds number flows when the shock sweep angle is small. It is also shown that this equation poorly approximates the complete potential equation when embedded shock waves are swept at angles greater than about 15 deg. Hence, a more consistent small disturbance equation is derived for use in more general cases.

Keywords: AERODYNAMICS

Type: NASA-TN-D-6933 , A-4583

Format: application/pdf

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