Evolution of nonlinear processes in a hypersonic boundary layer on a sharp cone
摘要：
Nonlinear processes in a hypersonic boundary layer on a sharp cone are considered using the bicoherence method. The experiments are performed for a Mach numberM∞= 5.95 with introduction of artificial wave packets at the frequency of the second mode. It is shown that the basic mechanism of nonlinear interaction at the location of the maximum r.m.s. voltage fluctuation is the subharmonic resonance; all nonlinear interactions in the maximum r.m.s. voltage fluctuation layer are related to the second mode of disturbances; nonlinear processes above and below that layer are much more intense than those in it. The effect of artificial disturbances on nonlinear interactions in the boundary layer is shown to be insignificant.
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关键词：
Experimental/ boundary layers hypersonic flow wakes/ nonlinear processes hypersonic boundary layer sharp cone bicoherence method Mach number artificial wave packets/ A4740K Supersonic and hypersonic flows A4725F Boundary layer and shear turbulence A4725R Wakes
DOI：
10.1017/S0022112008003030
被引量：
年份：
2008
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