Abstract
The interaction between disturbances in the hypersonic boundary layer on impermeable and porous surfaces is considered within the framework of weakly-nonlinear stability theory. It is established that on the impermeable surface nonlinear interactions between different waves (acoustic and vortex) occur in the parametric resonance regime. The role of pumping wave is played by a plane acoustic wave. The nonlinear interactions take place over a wide frequency range and can lead to the packet growth of Tollmien-Schlichting waves. On the porous surface the analogous interactions are fairly weak and result in a slight decay of the acoustic mode and a slight amplification of the vortex mode. This leads to the dragging out of the laminar flow regime and the regions of linear disturbance growth. In this situation the low-frequency spectrum of the vortex modes may be filled on account of the nonlinear processes occurring in the three-wave systems between the vortex components.
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Original Russian Text © A.A. Gaponov, N.M. Terekhova, 2009, published in Izvestiya Rossiiskoi Akademii Nauk, Mekhanika Zhidkosti i Gaza, 2009, Vol. 44, No. 3, pp. 36–46.
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Gaponov, A.A., Terekhova, N.M. Three-wave interactions between disturbances in the hypersonic boundary layer on impermeable and porous surfaces. Fluid Dyn 44, 362–371 (2009). https://doi.org/10.1134/S0015462809030041
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DOI: https://doi.org/10.1134/S0015462809030041