Navier-Stokes simulations of blade-vortex interaction using high-order accurate upwind schemesConventional, spatially second-order-accurate, finite-difference schemes are much too dissipative for calculations involving vortices that travel large distances (relative to some measure of the size of the vortex). This study presents a fifth-order-accurate upwind-biased scheme that preserves vortex structure for much longer times than existing second-order-accurate central and upwind difference schemes. Vortex calculations demonstrating this aspect of the fifth-order scheme are also presented. The method is then applied to the blade-vortex interaction problem. Results for strong interactions wherein the vortex impinges directly on the airfoil or a shock associated with the airfoil are presented. None of these calculations required any modeling of the shape, size, and trajectory of the interacting vortex.
Document ID
19870035421
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Rai, Man Mohan (NASA Ames Research Center Moffett Field, CA, United States)