Aspect ratio effects in wind tunnel studies of shock wave reflection transition |
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| Authors: | B.W. Skews |
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| Affiliation: | (1) Shock Wave Research Center, Institute of Fluid Science, Tohoku University, Japan , JP;(2) School of Mechanical Engineering, University of the Witwatersrand, P O WITS, 2050, Johannesburg, South Africa , ZA |
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| Abstract: | The transverse wave patterns and flow fields around double wedge experimental arrangements in supersonic facilities for the study of transition from regular to Mach reflection are examined. Guidelines for the minimum inlet aspect ratio to be used are determined in order to ensure that the reflection point is protected from side influences. A preliminary visualization study of the reflection of the wave systems from two wedges of small aspect ratio, has shown the appearance of a new feature in the transition from regular to Mach reflection, that of a dynamic flow distortion, which is presumed to arise due to three-dimensional adjustments in pressure. It occurs in the vicinity of the 2-dimensional mechanical equilibrium point. Oblique shadowgraph images are used to help visualize the flow system. Received 10 December 1996 / Accepted 24 March 1997 |
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| Keywords: | : Mach reflection 3-D flows Supersonic flow |
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