Interaction between an Oblique Shock Wave and a Circular Cylinder Placed in Supersonic Flow

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  • 超音速流中におかれた円柱と斜め衝撃波の干渉について
  • チョウオンソクリュウチュウ ニ オカレタ エンチュウ ト ナナメ ショウゲキハ

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This paper presents an experimental and numerical study of interaction of an oblique shock wave and a detached shock wave formed ahead of a circular cylinder.<BR>Measurements of pressure distribution and shock shape are made on circular cylinder at free stream Mach number of 2.48 and for 27.5° shock impingement. Next, supersonic flow over a circular cylinder is computed in the plane of symmetry of the flow field. A time-dependent second-order finite difference method is used to solve the equations for a perfect gas. The shock wave is treated as a discontinuity, across which the RANKINE-HUGONIOT relations are used to compute the flow conditions behind the shock.<BR>It is shown that an upward subsonic jet is formed right below the impingement point and therefore increases the shock detachment distance.

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