Abstract
Separation due to the shock-wave/boundary-layer interaction in a supersonic/hypersonic inlet always brings negative effects on its performance. A new control method of the shock-wave/boundary-layer interaction based on a two-dimensional bump is brought forward and investigated by both experimental and computational methods. First, the uncontrolled case is studied. The flow turning angle of the incident shock is 12 deg, and the freestream Mach number is 3.5. The results show that the shock-wave/boundary-layer interaction generates complex three-dimensional flow structures with significant swirling nature, which will substantially deteriorate the performance of a supersonic/hypersonic inlet. Then, the controlled case demonstrates that the shock-induced flow separation can be effectively reduced by the coupling of the precompression effect and the acceleration effect of the bump with a height of 0.33 times of the boundary-layer thickness. In addition, the efficiency of the control method for different shock-impingement positions is obtained, indicating that the separation can be well controlled when the shock impinges on the convex surface of the bump or the concave surface on the leeward side of the bump.
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