Experimental Investigations of the Flow through Slotted Wall in Transonic Wind Tunnel*

Abstract

Abstract Experimental study of the flow through slotted wall was conducted in 0.6m transonic and supersonic wind tunnel. Transverse flow properties, such as flow angle, pressure, velocity components were measured using travelling probe, and distributions of Mach number, total pressure recovery were acquired for both empty tunnel and airfoil model cases. Shear layer thickness was calculated based on test results. Results showed that, transverse velocity from shear layer through slot into plenum chamber is approximately linear, and wall shear layer thickness was up to 3 to 4 times slot widths on slot center plane, and homogeneous boundary conditions were inaccurate.