Journal of Applied Mechanics and Technical Physics

, Volume 50, Issue 5, pp 733–741 | Cite as

Three-wave interactions of disturbances in a hypersonic boundary layer on a porous surface

  • S. A. Gaponov
  • N. M. Terekhova


Interactions of disturbances in a hypersonic boundary layer on a porous surface are considered within the framework of the weakly nonlinear stability theory. Acoustic and vortex waves in resonant three-wave systems are found to interact in the weak redistribution mode, which leads to weak decay of the acoustic component and weak amplification of the vortex component. Three-dimensional vortex waves are demonstrated to interact more intensively than two-dimensional waves. The feature responsible for attenuation of nonlinearity is the presence of a porous coating on the surface, which absorbs acoustic disturbances and amplifies vortex disturbances at high Mach numbers. Vanishing of the pumping wave, which corresponds to a plane acoustic wave on a solid surface, is found to assist in increasing the length of the regions of linear growth of disturbances and the laminar flow regime. In this case, the low-frequency spectrum of vortex modes can be filled owing to nonlinear processes that occur in vortex triplets.

Key words

hypersonic boundary layer three-wave resonance systems acoustic and vortex disturbances 


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Copyright information

© MAIK/Nauka 2009

Authors and Affiliations

  1. 1.Khristianovich Institute of Theoretical and Applied Mechanics, Siberian DivisionRussian Academy of SciencesNovosibirskRussia

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