Jet Interaction in Supersonic Flow with a Surface Ramp
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An experimental and computational study have been performed for investigation of the jet interaction in supersonic flow with a surface ramp located behind a sonic, transverse jet. The goal was to reduce the low pressure region behind the jet which produces an unwanted nosedown moment on a vehicle. The experimental techniques include conventional pressure taps, schlieren photos, and Pressure Sensitive Paint(PSP). The numerical solver used in this study is AeroSoft's structured flow solver GASP Version 4.0. Air was injected through a circular injector into a Mach 4 crossflow with a pressure ratio of 532, and the 3D ramp was designed by parametric study using GASP. The CFD and PSP results are verified with pressure tap results, and all results are compared with the main jet only case and the ramp case. The results showed that the ramp which is located downstream of the jet decreases the nose-down pitching moment without a force loss. © 2003 by the authors.
author list (cited authors)
Byun, Y., Wallis, S., Viti, V., Bae, K. J., Schetz, J., & Bowersox, R.