鈍頭平板まわりのはく離と再付着を伴う流れおよび熱伝達の三次元数値解析

抄録

This paper presents three-dimensional simulations of an unsteady separated and reattached flow and the heat transfer over a blunt flat plate. A numerical analysis of the Navier-Stokes equations and energy equation is carried out using the finite difference method. The present results of three-dimensional calculations are compared with the previous results of two-dimensional ones and show an improvement of accuracy of the flow characteristics, demonstrating the importance of three- dimensional simulations for nominally two-dimensional flow. It is clarified from the numerical results that the separated shear layer becomes unstable and forms spanwise vortices. These vortices become three-dimensional and are shed from the reattachment flow region. The shed vortices possess hairpin-like structure. These large-scale vortex structures have great effects upon the heat transfer in the separated, reattached and redeveloping flow regions.