Experimental Studies on the Hypersonic Flow past Plane, Convex and Concave Wedges

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概要

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• In this paper, the phenomena of viscous-inviscid interaction effects at M_∞ = 6.2 over the front part of bodies have been investigated. The models tested are a flat plate and wedges having a plane, a convex or a concave surface, respectively. A uniform flow of R_∞ = 2.0 × 10^5 per cm was established using a divergent shock tube. The measurements of the flow field were made by optical methods (interferometer and schlieren photograph), and in order to supplement the data the X-ray technique was employed near the leading edge of the model. The results are as follows. (1) For a flat plate: i) the pressure distribution on the sharp-nosed plate is about 5 per cent higher than Nagakura-Naruse's theoretical values; ii) the boundary layer thickness agrees almost perfectly with Naruse's theoretical values; iii) the shock wave location is in good agreement with the empirical formulae of Kendall and of Bogdonoff and Hammitt. (2) For wedges: i) near the leading edge, the boundary layer growth on a concave wedge is more rapid than that either on a plane or a convex wedge; ii) except in the region close to the leading edge, the influence of leading edge bluntness on boundary layer growth is significant in the order of convex wedge, plane wedge and concave wedge; iii) except in the region very close to the leading edge, the pressure distributions at the front parts of the plane and convex wedges are in fairly good agreement with the values predicted by inviscid theories (characteristic method, tangent-wedge approximation, Newtonian-plus-centrifugal-force approximation and hypersonic small disturbance theory), but considerable discrepancies are found at the rear parts; iv) for the concave wedge, agreement is rather better at the rear part of the body than at its front part.

• 社団法人日本物理学会の論文
• 1959-06-05

著者

• KIM CHUL-SOO

  Department of Urology and Pathology, School of Medicine, Kyung Hee University

• Kim Chul-soo

  Department Of Physics Faculty Of Science University Of Tokyo:(present)department Of Physics National

• Kim Chul-soo

  Department Of Physics Faculty Of Science University Of Tokyo

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