Numerical and Analytical Investigation of Orthogonal Blade/Vortex Interaction Noise

Abstract

Fast prediction methods used for preliminary design or in optimization algorithms often rely on linear analytical models based on drastic simplifications of the physical problem to be solved. To be used with a reasonable confidence level, these models must be validated over either experimental data or data coming from numerical simulations. In this context, this paper presents a cross-comparison of the aeroacoustic response of an orthogonal blade/vortex interaction computed using a high-order CFD solver and an acoustic analogy with an analytical model recently developed for this specific problem. The general framework is the acoustic prediction of Counter-Rotating Open Rotors in the preliminary design stages. This work follows two objectives. The first one is to improve the understanding of the phenomena occurring during such an interaction through the mean of CFD. The second one is to characterize the current limitations of the analytical modeling to make recommendations for their improvement.

Aeroacoustic Study of the Interaction of a Rotating Blade with a Batchelor Vortex

“…1. The numerical setup, described hereafter, relies on a methodology developed in previous papers [26][27][28].…”

Aeroacoustic Study of the Interaction of a Rotating Blade with a Batchelor Vortex

“…The numerical setup, described hereafter, relies on a methodology developed in previous papers [26][27][28].…”