PIV investigation of supersonic base-flow-plume interaction

Abstract

An experimental flow study of an axisymmetric body in a supersonic stream with an exhaust nozzle operating in the supersonic regime has been performed by means of particle image velocimetry. The "FESTIP" model was investigated at free-stream Mach numbers of 2 and 3. The exhaust jet is slightly under-expanded at the nozzle exit at Mach 4. The measurements cover the base region and wake of the model. The PIV technique employs solid submicrometer particle tracers and the particle-image recordings are interrogated with an adaptive multigrid window-deformation technique. Statistical flow analysis provides mean velocity and turbulence intensity for the cases with and without an exhaust jet. The latter case is used for a quantitative comparison of the experimental results with a 3D numerical flow simulation performed with the LORE code. © 2008 Springer-Verlag Berlin/Heidelberg.