Compressible Flow Structures Interaction with a Two-Dimensional Ejector: A Cold-Flow Study

摘要

An experimental study has been conducted to examine the interaction of compressible flow structures such as shocks and vortices with a two-dimensional ejector geometry using a shock-tube facility. Three diaphragm pressure ratios of P_4/P_1 = 4,8, and 12 have been employed, where P_4 is the driver gas pressure and p_1 is the pressure within the driven compartment of the shock tube. These lead to incident shock Mach numbers of M_s = 1.34, 1.54, and 1.66, respectively. The length of the driver section of the shock tube was 700 mm. Air was used for both the driver and driven gases. High-speed shadowgraphy was employed to visualize the induced flowfleld. Pressure measurements were taken at different locations along the test section to study the flow quantitatively. The induced flow is unsteady and dependent on the degree of compressibility of the initial shock wave generated by the rupture of the diaphragm.