HEAT TRANSFER IN A REAL GAS FLOW IN THE BOUNDARY LAYER BEYOND A SHOCK WAVE


  • A.A. Avramenko Institute of Engineering Thermophysics of the National Academy of Sciences of Ukraine
  • M.M. Kovetskaya Institute of Engineering Thermophysics of the National Academy of Sciences of Ukraine
  • Y.Y. Kovetska Institute of Engineering Thermophysics of the National Academy of Sciences of Ukraine
  • O.I. Skitsko Institute of Engineering Thermophysics of the National Academy of Sciences of Ukraine
DOI: https://doi.org/10.31472/ttpe.4.2023.2
Keywords: heat transfer, real gas, boundary layer, shock wave, slip effect.

Abstract

A mathematical model of nonideal gas flow in a boundary layer behind a shock wave is presented, taking slip effects into account. The model takes into account the effect of shock wave intensity (U¥/Us), physical (Pr) and thermodynamic (Waa, Wab) gas properties, slip effects (Kn) and surface temperature (T0/Tw). The results of calculations of the heat transfer coefficients (Nusselt number) depending on the Knudsen number and van der Waals parameters are presented.

It is shown that slip effects lead to a decrease in the intensity of transfer processes on the wall due to the weakening of the interaction between the flow and the surface. The slip effect weakens with increasing value of the Waa parameter, which is explained by the additional pressure. This eliminates the effect of slippage, enhancing the interaction between the flow and the surface. On the contrary, an increase in the value of the Wab parameter enhances the effect of slippage due to additional volume.

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Published
2023-11-23
How to Cite
Avramenko, A., Kovetskaya, M., Kovetska, Y., & Skitsko, O. (2023). HEAT TRANSFER IN A REAL GAS FLOW IN THE BOUNDARY LAYER BEYOND A SHOCK WAVE. Thermophysics and Thermal Power Engineering, 45(4), 16-25. https://doi.org/https://doi.org/10.31472/ttpe.4.2023.2
Issue
Vol 45 No 4 (2023): Thermophysics and Thermal Power Engineering
Section
Articles
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