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On the possibility of blowing a gas jet into a supersonic flow without formation of a three-dimensional boundary-layer separation zone

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Abstract

We consider the flow formed by the interaction of a supersonic flow and a transverse sonic or supersonic jet blown at right angles to the direction of the main flow through a nozzle whose exit section is in a flat wall. When a gas jet is blown through a circular opening [1] the pressure rises in front of the jet because of the stagnation of the oncoming flow. This leads to separation of the boundary layer formed on the wall in front of the blowing nozzle. The resulting three-dimensional separation zone leads to a sharp increase in the pressure and the heat fluxes to the wall in front of the blowing nozzle, which is undesirable in many modern applications. The aim of the present investigation was to find a shape of the exit section of the blowing nozzle for which there is no three-dimensional separation zone of the boundary layer in front of the blowing nozzle.

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Literature cited

  1. 1.

    V. S. Avduevskii, K. I. Medvedev, and M. N. Polyanskii, “Interaction of a supersonic flow with a transverse jet blown through a circular opening in a plate,” Izv. Akad. Nauk SSSR, Mekh. Zhidk. Gaza, No. 5 (1970).

  2. 2.

    G. N. Abramovich, Applied Gas Dynamics [in Russian], Nauka, Moscow (1969).

  3. 3.

    V. S. Avduevskii and K. I. Medvedev, “Physical properties of flow in the separation region in the case of three-dimensional interaction of a boundary layer and a shock wave,” Izv. Akad. Nauk SSSR, Mekh. Zhidk. Gaza, No. 1 (1967).

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Translated from Izvestiya Akademii Nauk SSSR, Mekhanika Zhidkosti i Gaza, No. 3, pp. 162–165, May–June, 1979.

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Masyakin, N.E., Polyanskii, M.N. On the possibility of blowing a gas jet into a supersonic flow without formation of a three-dimensional boundary-layer separation zone. Fluid Dyn 14, 459–461 (1979). https://doi.org/10.1007/BF01062456

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Keywords

  • Boundary Layer
  • Heat Flux
  • Sharp Increase
  • Supersonic Flow
  • Main Flow