Journal
PHYSICS OF FLUIDS
Volume 34, Issue 10, Pages -Publisher
AIP Publishing
DOI: 10.1063/5.0110928
Keywords
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Categories
Funding
- National Key Research and Development Program of China
- National Natural Science Foundation of China
- [2016YFA0401201]
- [2019YFA0405204]
- [12132017]
- [11872066]
- [11727901]
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This study investigates the hypersonic boundary-layer transition on a large-scale cone in a hypersonic flight duplicate shock tunnel. The transition Reynolds number shows a trend of first increasing and then decreasing with the increase in the bluntness Reynolds number, indicating a transition reversal phenomenon.
In this Letter, hypersonic boundary-layer transition was investigated on a large-scale cone with a height of 3 m and a half-cone angle of 7 degrees at a zero angle of attack in the JF-12 hypersonic flight duplicate shock tunnel. For the same freestream unit Reynolds number, with the increase in the bluntness Reynolds number, the transition Reynolds number has a trend of first increasing and then decreasing, showing a transition reversal phenomenon. As the bluntness increased, the high/low-frequency instability waves in the boundary-layer were modulated, which caused the boundary-layer transition to be delayed and then advanced. Published under an exclusive license by AIP Publishing.
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