Discontinuous Galerkin multimodel methods for optimal control of aeroacoustics
Discontinuous Galerkin multimodel methods for optimal control of aeroacoustics
- New search for: Chen, Guoquan
- New search for: Collis, S. Scott
- New search for: Chen, Guoquan
- New search for: Collis, S. Scott
A new multimodel computational framework for optimal control of aeroacoustic noise is presented using a nearfield compressible Navier-Stokes solver coupled with a far-field linearized Euler solver, both based on a discontinuous Galerkin formulation. In this approach, the coupling of near- and far-field domains is achieved by weakly enforcing continuity of normal fluxes across a coupling surface that encloses all nonlinearities and noise sources. For optimal control, gradient information is obtained by the solution of an appropriate adjoint problem that involves the propagation of adjoint information from the far field to the near field. This computational framework is applied to study optimal boundary control of blade-vortex interaction, which is a significant noise source for helicopters on approach to landing. In the prototype problem presented here, the noise propagated toward the ground is reduced by 12 dB, demonstrating the potential of an optimization-based approach to blade-vortex interaction noise control.
Document information
Discontinuous Galerkin multimodel methods for optimal control of aeroacoustics
Diskontinuierliche Galerkin-Multimodellverfahren für die optimale Aeroakustiksteuerung
AIAA Journal ; 46 , 8 ; 1890-1899
2008
10 Seiten, 12 Bilder, 54 Quellen
Article (Journal)
English
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