Computation of three-dimensional turbulent shear flows in corners

Abstract

A numerical technique developed for the solution of the steady Navier-Stokes equations using a space marching algorithm has been used to predict a complex, three-dimensional turbulent flow. The scheme has been designed to calculate flows with a dominant flow direction, in three-dimensional geometries, and has been used successfully to predict laminar flows. This paper is concerned with the extension of this technique to calculate turbulent flows in the corner region of the wingbody junction using both the algebraic eddy viscosity and the A>e turbulence models. The effects of different boundary conditions for the streamwise velocity at a solid boundary, used in many turbulent flow computations, are also considered. In the flow cases computed in this paper using a law of the wall boundary condition at solid boundaries, the A>e model showed no distinct advantages over the simpler algebraic viscosity model. However, the k-€ model provided much better results for the cases computed with the more realistic no-slip boundary condition.