Crossing shock waves/transitional boundary layers interactions in the double vertical wedges configuration

YI Miaorong; ZHANG Ruoling; YUE Maoxiong; LI Li; REN Hu; ZHAO Huiyong

doi:10.11729/syltlx20220050

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YI M R，ZHANG R L，YUE M X，et al. Crossing shock waves/transitional boundary layers interactions in the double vertical wedges configuration[J]. Journal of Experiments in Fluid Mechanics, 2022，36（X）：1-12. doi: 10.11729/syltlx20220050

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Crossing shock waves/transitional boundary layers interactions in the double vertical wedges configuration

doi: 10.11729/syltlx20220050

Science and Technology on Scramjet Laboratory, Aerospace Technology Institute of China Aerodynamics Research and Development Center, Mianyang　621000, China

Received Date: 2022-06-16
Accepted Date: 2022-09-05
Rev Recd Date: 2022-08-15

Available Online: 2022-10-19

Abstract

Abstract

Study on crossing shock waves/transitional boundary layer interaction in the double vertical wedges configuration was carried out using wind tunnel tests and numerical calculations. The wind tunnel tests were carried out at Φ 600 mm pulse combustion wind tunnel. The Mach number of the free stream condition is 3.0, and the unit Reynolds number is 2.1×10⁶ m⁻¹. The schlieren images, wall pressure and wall heat fluxes were obtained during the tests. The results show that because of the adverse pressure gradient caused by the crossing shock waves, the separation of the laminar boundary layer was captured near the shock waves intersection point. And the transition from laminar to turbulent occurred rapidly in the interaction region. After installation of vertex generator devices or roughness devices, the boundary layer transition position moved to the upstream of the interaction region, the separation was effectively inhibited. And the heat fluxes in the interaction region declined obviously. The peak value of heat fluxe was reduced by more than 25%. The shock wave structures and wall pressure distributions obtained from tests and simulations agreed well, while the prediction heat fluxes were much larger than the test results. The comparison between the calculated results of the transition model and the turbulence model shows that the obviously larger turbulence viscosity is the main reason why RANS methods over-predict the heat fluxes in the unseparated interaction region.
- crossing shock waves,
- shock waves/boundary layer interaction,
- turbulence,
- transition

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References(31)

References

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