A sensitivity based optimization approach for aeroacoustic problems

Abstract

This paper proposes an approach for the sensitivity computation of an aeroacoustic problem via the solution of the continuous sensitivity equations. The equations are derived by differentiating the coupled system (Navier-Stokes equations and the linearized Euler equations) with respect to design parameters. The obtained acoustic sensitivity information can be used to analyze the flow control variable’s influence on the acoustic field or to calculate the gradient of an objective functional within aeroacoustic optimization problems. The components of the coupled sensitivity solver are systematically verified.