Large structure convection velocity measurements in compressible transverse injection flowfields

摘要: Temporally correlated Rayleigh/Mie scattering images were used to examine the convection characteristics of large-scale vortex structures developing in flowfields created by sonic transverse injection through circular and elliptical nozzles into a Mach 1.98 crossflow. Both compressibility injector geometry found have significant influences on large eddies. High cases produce eddies having dramatically larger near-field velocities than those low cases. Farther downstream, vortices tend travel at nearer freestream veocity. Injector primarily affects behavior.