To study the flow separation caused by the shock wave/boundary layer interaction in the inner flow channel, RANS method is used to calculate the flow in a rectangular channel with a 20° wedge angle of different widths and heights under Mach 6 inflow. Studies on the separation structure of the inner flow channel are carried outby focusing on the structural characteristics of the separation in the center region of the bottom wall, comparing the flow structures under different geometric parameters, and summarizing the variation rules as well as discussing the influence mechanism of each parameter. The results show that the separation induced by shock wave in the inner channel has a complex three-dimensional structure; the vortex structure in the center separation zone of the bottom wall is "Ω"-shaped; the mass exchange with the separation near the side wall occurs through the cyclone vortex of "Ω" vortex. Under the condition of given inflow state parameters, the separation structure of the bottom wall is mainly affected by channel width W and height H, where H mainly affects the separation size near the side wall and the distance between the cyclone vortex and the side wall, and W mainly affects the distance between the cyclone vortex. The interaction between the cyclone vortexes is the key to the central separation of the present two-dimensional or three-dimensional features.
XIE Zhuxuan
,
YANG Yanguang
,
WANG Gang
. Structure of shock-induced separation in confined flow[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2022
, 43(1)
: 626042
-626042
.
DOI: 10.7527/S1000-6893.2021.26042
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