Numerical and Experimental Investigations of An ASME Venturi Flow in A Cross Flow

Abstract

Numerical investigations of an ASME venturi flow into a cross flow were performed. The velocity ratios between the venturi flow and the free stream were 25, 50, and 75%. For the numerical investigations, two cases of the venturi with and without a tube extension have been investigated. The tube extension was approximately 4D (here D is the inner diameter of the venturi’s outlet), connecting the venturi to the bottom surface of the numerical wind tunnel. A finite volume approach with the Wilcox K-ω turbulence model were used. Results for the numerical investigations indicate that when the venturi is flushed with the surface, there are flow separations within the venturi, near the outlet for 25% and 50% velocity ratios. However, at the higher momentum ratio, pressure recovery is sustained, flow separation has disappeared and flow characteristics are similar to a jet in cross flow. When the tube extension was added, at all velocity ratios, the pressure recovery was sustained and flow separation within the venture was not present and the characteristics of the flow were similar to the corresponding characteristics of a pipe jet in a cross flow. The paper also includes some experimental results at the venturi’s outlet and in the near-field regions downstream of the jet in cross flow.