Helicopter rotor noise prediction using ONERA and DLR euler/kirchhoff methods

摘要

Euler/Kirchhoff methods have been developed at ONERA and DLR to predict the High Speed Impulsive(HSI)noise gener- ated by helicopter rotors in hover or in forward flight. The main purpose of this common work is to validate and to compare aeroacoustic computations on delocalized test cases. Code to code comparisons show rather close aerodynamic and acoustic predictions. Acoustic results are identical when using the same aerodynamic inputs. In hover, both aerodynamic and acoustic results obtained by each partner are in good agreement with experiment.