Jet Interaction in Supersonic Flow with a Downstream Surface Ramp
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An experimental and computational study has been performed for investigation of jet interaction in supersonic flow with a three-dimensional surface ramp located behind a sonic, transverse jet. The goal was to reduce the low-pressure region behind the jet, which produces an unwanted nose-down 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. A Mach 4 crossflow with a jet stagnation pressure ratio of 532 was considered, and the three-dimensional downstream ramp was designed by a parametric study using GASP. The computational-fluid-dynamics and PSP results are verified with pressure tap results, and all results are compared between the jet-only case and jet-plus-ramp case. The results showed that the ramp located downstream of the jet decreases the nose-down pitching moment without a net force loss.
Journal of Spacecraft and Rockets
author list (cited authors)
Byun, Y. H., Bae, K. J., Wallis, S., Viti, V., Schetz, J. A., & Bowersox, R.
complete list of authors
Byun, YH||Bae, KJ||Wallis, S||Viti, V||Schetz, JA||Bowersox, R