Non-stationary effects in hypersonic nonuniform dusty-gas flow past a blunt body |
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Authors: | A N Osiptsov A V Rozin Wang Boyi |
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Institution: | (1) Institute of Mechanics, Lomonosov Moscow State University, 119899 Moscow, Russia;(2) Institute of Mechanics, Chinese Academy of Sciences, 100080 Beijing, China |
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Abstract: | In the framework of the two-fluid model, a hypersonic flow of a nonuniform dusty gas with low inertial (non-depositing) particles
around a blunt body is considered. The particle mass concentration is assumed to be small, so that the effect of particles
on the carrier phase is significant only inside the boundary layer where the particles accumulate. Stepshaped and harmonic
nonuniformities of the particle concentration ahead of the bow shock wave are considered and the corresponding nonstationary
distributions of the particle concentration in the shock layer are studied. On the basis of numerical study of nonstationary
two-phase boundary layer equations derived by the matched asymptotic expansion method, the effects of free-stream particle
concentration nonuniformities on the thermal flux, and the friction coefficient in the neighborhood of stagnation point are
investigated, in particular, the most “dangerous” nonuniformity periods are found.
The project supported by the Russian Foundation for Basic Research (project No. 96-01-00313) and the National Natural Science
Foundation of China (joint RFBR-NSFC grant No. 96-01-00017c) |
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Keywords: | dusty gas hypersonic flow blunt body non-stationary effects |
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