Accelerated, high resolution free-vortex wakes for rotor aeroacoustic analysis

Abstract

Numerical acceleration algorithms have been developed to improve the computational efficiency of rotor free-vortex wake analyses. Two general methodologies were formulated: an adaptive grid sequencing algorithm, and a velocity field interpolation algorithm. The methods were found to produce up to an order of magnitude decrease in execution time, but without significant loss in predictive accuracy. Examples are shown for very high fidelity wake geometries required for rotor aeroacoustic analyses.