A New Tool for Screen Integration in Internal Flow System and its Application to Wind Tunnel Design.

Abstract

To consider mesh screens in internal fluid flow a numerical method is modified. A Navier-Stokes method with the standard k-e turbulence model is employed. The new extended numerical method is applied to wide-angle diffuser flow. The comparison of calculated diffuser flows with experimental results yields the requisite correspondence. The numerical and experimental investigations lead to a modification of the actual windtunnel. After realization of the modification a remarkable reduction of spatial velocity disturbances is achieved. The capability of screens to suppress turbulence is displayed by comparison of turbulence level distributions before and past the optimization of the settling chamber.