Shock interaction mechanisms on a double wedge at Mach 7

被引:34
作者
Durna, Ahmet Selim [1 ]
Barada, Mohamad El Hajj Ali [1 ]
Celik, Bayram [1 ]
机构
[1] Istanbul Tech Univ, Astronaut Engn Dept, TR-34469 Istanbul, Turkey
关键词
CENTRAL SCHEMES; FLOWS; IMPLEMENTATION; OSCILLATIONS; FRAMEWORK; SPEED;
D O I
10.1063/1.4961571
中图分类号
O3 [力学];
学科分类号
08 ; 0801 ;
摘要
Present computational study investigates formation and interaction mechanisms of shocks and boundary layer for low enthalpy Mach 7 flows of nitrogen over double wedges, which have fixed fore and various aft angles of 30 degrees and 45 degrees-60 degrees, respectively. We use a density based finite-volume Navier-Stokes solver to simulate low enthalpy Mach 7 flows of nitrogen over double wedges. The solver is first and second order accurate in time and space, respectively. The meshes used in simulations of two-dimensional laminar flows consist of multiple blocks of structured mesh. Depending on the intensity, impingement angle, and impingement location of transmitted shock wave, the resulting adverse pressure gradient related disturbances on the wedge surface can trigger complex flow physics both in subsonic and supersonic regions. We observe a strong interaction between the deformation of the boundary layer and the bow shock as well as the transmitted shock for high aft angles. Comparison of the obtained results in terms of general flow physics shows that there exists an aft angle threshold value for such interaction which is in the range of 45 degrees-50 degrees. Published by AIP Publishing.
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页数:17
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