An Evaluation of a Rotating Kirchhoff Acoustic Methodology

摘要

Rotorcraft Impulsive (i.e. High -Speed Impulsive (HIS) and Blade-Vortex Interaction (BVI) noise for advancing rotors is stud- ied numerically. The unsteady transonic Full-potential Rotor (FPR or FPRBVI) code is used for the esimulation of the near- field flow. A rotating Kirchhoff's method has been installed in the TRAC (TiltRotor Aeroacoustic Codes) system of NASA Lan- gley and is used for the extension to the acoustic far-field. The results are compared to available experiments and results from the acoustic analogy code WOPWOP.