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The Prediction of Transonic Flows on an Advancing Rotor

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The object of this investigation was to find and demonstrate a means of performing efficient finite‐difference computations of rotor loading for a trimmed rotor in high‐speed, forward flight. The essence of the scheme that was developed is a loose‐coupled iteration procedure between a finite difference and a comprehensive integral rotor code. The coupling involves a transfer of appropriate load and inflow data on the advancing side between the two codes such that consistency is maintained. Sample computations, including a limited comparison with model rotor data, are presented. The scheme converges rapidly. However, even one iteration with this scheme can provide sufficient accuracy for many purposes.

Document Type: Research Article

Affiliations: Aeroflightdynamics Directorate, U.S. Army Research and Technology Activity (AVSCOM), Moffett Field, Calif.

Publication date: July 1, 1986

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