Experimental and Theoretical Study of Wide-Angle Diffuser Flow with Screens.

Kurzfassung

A numerical method is modified to enable the computation of diffuser flows containing mesh screens. A Navier-Stokes method with the standard k-e turbulence model is applied. Screen influence on the velocity distribution is demonstrated using flow in a straight duct. A comparison of calculated diffuser flows is made with experimental results. The numerical and experimental investigations on the wide-angle diffuser flow of the transonic wind tunnel at DLR have led to a modification of the actual wind tunnel. An appreciable reduction of spatial velocity disturbances is achieved after realization of the modification.