Interaction of a Supersonic Underexpanded Jet with a Flat Plate
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High-spatial resolution measurements of the velocity field of a supersonic jet impinging on a flat surface were conducted. To study the effect of the boundary condition, two nozzle outer geometries were investigated. The experimental results presented here are for a nozzle pressure ratio of NPR = 3.0 and a nozzle to plate spacing of \(Z/D = 3.5\). The flow fields of the corresponding cases show that although the general features of the flow are similar, the ambient air entrainment into the shear layer is different. This change in entrainment influences the rest of the jet structure.
KeywordsParticle Image Velocimetry Shear Layer Digital Particle Image Velocimetry Nozzle Pressure Ratio Shock Cell
The financial support to conduct this research by the Australian Research Council is gratefully acknowledged. This research was undertaken with the assistance of resources from the National Computational Infrastructure (NCI), which is supported by the Australian Government.
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