An analysis of shock-wave cancellation and reflection for porous walls which obey an exponential mass-flow pressure-difference relation

Joseph M. Spiegel, Phillips J. Tunnell
naca-tn-3223
Aug 1954


Two-dimensional oblique shock-wave theory is used to define conditions for cancellation and reflection of shock waves from porous walls. An exponential relation between mass flow normal to the walls and pressure differential through the walls is assumed. A porosity factor is defined which uniquely determines cancellation conditions and is independent of the exponent of the mass-flow pressure-difference relation but is dependent upon the amount of wall suction.

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