Theoretical study on regular reflection of shock wave-boundary layer interactions

Theoretical study on regular reflection of shock wave-boundary layer interactions

Xue, S. (TU Delft Aerodynamics; Nanjing University of Aeronautics and Astronautics; Key Laboratory of Unsteady Aerodynamics and Flow Control)
Schrijer, F.F.J. (TU Delft Aerodynamics)
van Oudheusden, B.W. (TU Delft Aerodynamics)
Wang, Chengpeng (Nanjing University of Aeronautics and Astronautics)
Shi, Zhiwei (Nanjing University of Aeronautics and Astronautics)
Cheng, Keming (Nanjing University of Aeronautics and Astronautics)

2020

In this paper the configurations of shock wave-boundary layer interactions (SWBLI) are studied theoretically and experimentally in Mach number 2 and 2.5 flows on test models with various wedge angles ranging from to. The proposed theoretical method couples the free interaction theory (FIT) with the minimum entropy production (MEP) principle to predict the appearance of separation shock, resulting in convex, straight and concave separation shock waves according to different solution combinations, which agree well with current experiments. Additionally, several influences on SWBLI are studied experimentally, in which the parameters related to theoretical solutions are found mostly determining the flow configuration, and SWBLI is much more sensitive to incident shock strength than incoming flow properties. Separation could be suppressed by incident shock when the MEP solution is smaller than the FIT, while it could be intensified when the MEP solution is larger than FIT; by contrast, the effects of separation position and model mounting height could be very weak.

boundary layer separation
high-speed flow
shock waves

http://resolver.tudelft.nl/uuid:9a4ef3ed-66ae-489a-9f4c-b6de77b125b1

https://doi.org/10.1017/jfm.2020.455

0022-1120

Journal of Fluid Mechanics, 899

Institutional Repository

journal article

© 2020 S. Xue, F.F.J. Schrijer, B.W. van Oudheusden, Chengpeng Wang, Zhiwei Shi, Keming Cheng