直角屈折管内を伝ぱする衝撃波の数値解析 : 断面縮小および角丸みの影響 (<小特集>衝撃波現象とその工学的応用)

概要

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In this paper, the shock wave propagating in a rectangular elbow and the transient flow induced by the shock were investigated numerically in order to clarify how the transmitted shock wave past the elbow is stabilized to uniformity by the effects of area reduction and the rounded corner. Computations were carried out by solving the two-dimensional compressible Navier-Stokes equations by using the total variation diminishing (TVD) scheme. Calculations were performed for three kinds of area reduction ratios and the elbow whose outside corner is rounded, and the flow fields were numerically visualized by the contour lines of pressure, vorticity, velocity vectors, sonic lines, pressure distributions and wave diagrams. The numerical results showed that the distance at which the nonuniformity of the transmitted shock continued became shorter with increasing area reduction ratio and the attenuation of the transmitted shock was considerably weak.
一般社団法人日本機械学会の論文
1994-07-25