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Nonuniform slot injection (suction) into a compressible flow. (English) Zbl 1064.76093
The paper studies the effect of nonuniform slot injection or suction on a steady nonsimilar compressible flow over a yawed infinite cylinder. The finite discontinuities arising at the leading and trailing edges of the slot for the uniform slot injection (or suction) are removed by choosing appropriate nonuniform mass transfer distributions in the slot. The difficulties arising at the starting point of the streamwise coordinate, at the edges of the slot, and at the point of separation are overcome by applying a quasilinear implicit finite difference scheme with an appropriate selection of finer step size along the streamwise direction. The results indicate that the nonuniform slot injection moves the point of separation downstream, but the nonuniform slot suction has the reverse effect. An increase in Mach number and total enthalpy at wall causes the separation to occur earlier while cooling delays it. The yaw angle has very little effect on the skin friction, and thus on the point of separation.

76N20 Boundary-layer theory for compressible fluids and gas dynamics
76M20 Finite difference methods applied to problems in fluid mechanics
Full Text: DOI
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