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Experimental Investigations of Supersonic Turbulent Flow over a Compression Ramp


Affiliations
1 National University of Defense Technology, Changsha 410073, China
 

Experimental studies of supersonic flow over a 28° compression ramp were carried out in a Mach 3.0 wind tunnel; the incoming boundary layer was turbulent flow. Fine flow structures were visualized via NPLS (nano-tracer-based planar laser scattering) technique. Analysis of two NPLS images between 10 μs revealed the spatio-temporal evolutions of flow field. The angles of separation shock and reattachment shock, and the development of boundary layer after reattachment were measured by time-averaged flow field. Velocity field structures were measured using particle image velocimetry technique. Streamlines in the mean velocity field indicated reverse flow in separation region, and variations of velocity vectors showed velocity shear. Moreover, flow separation and reattachment were clearly revealed by the analysis of velocity field.

Keywords

Compression Ramp, Nano-Tracer, Turbulent Flow, Velocity Field.
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  • Experimental Investigations of Supersonic Turbulent Flow over a Compression Ramp

Abstract Views: 384  |  PDF Views: 154

Authors

Wu Yu
National University of Defense Technology, Changsha 410073, China
Yi Shihe
National University of Defense Technology, Changsha 410073, China
He Lin
National University of Defense Technology, Changsha 410073, China
Chen Zhi
National University of Defense Technology, Changsha 410073, China
Zhu Yangzhu
National University of Defense Technology, Changsha 410073, China

Abstract


Experimental studies of supersonic flow over a 28° compression ramp were carried out in a Mach 3.0 wind tunnel; the incoming boundary layer was turbulent flow. Fine flow structures were visualized via NPLS (nano-tracer-based planar laser scattering) technique. Analysis of two NPLS images between 10 μs revealed the spatio-temporal evolutions of flow field. The angles of separation shock and reattachment shock, and the development of boundary layer after reattachment were measured by time-averaged flow field. Velocity field structures were measured using particle image velocimetry technique. Streamlines in the mean velocity field indicated reverse flow in separation region, and variations of velocity vectors showed velocity shear. Moreover, flow separation and reattachment were clearly revealed by the analysis of velocity field.

Keywords


Compression Ramp, Nano-Tracer, Turbulent Flow, Velocity Field.



DOI: https://doi.org/10.18520/cs%2Fv108%2Fi2%2F255-260