The prediction of transonic loading on advancing helicopter rotorsTwo different schemes are presented for including the effect of rotor wakes on the finie-difference prediction of rotor loads. The first formulation includes wake effects by means of a blade-surface inflow specification. This approach is sufficiently simple to permit coupling of a full-potential finite-difference rotor code to a comprehensive integral model for the rotor wake and blade motion. The coupling involves a transfer of appropriate loads and inflow data between the two computer codes. Results are compared with experimental data for two advancing rotor cases. The second rotor-wake modeling scheme is a split potential formulation for computing unsteady blade-vortex interactions. Discrete vortex fields are introduced into a three-dimensional, conservative, full-potential rotor code. Computer predictions are compared with two experimental blade-vortex interaction cases.
Document ID
19870010773
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Strawn, R. C. (NASA Ames Research Center Moffett Field, CA, United States)
Tung, C. (NASA Ames Research Center Moffett Field, CA, United States)
Date Acquired
August 13, 2013
Publication Date
November 1, 1986
Publication Information
Publication: AGARD Applications of Computational Fluid Dynamics in Aeronautics