Abstract
An overview is given of the coupled two-phase flow processes occurring in rocket exhaust plumes, and modeling procedures developed to treat these processes are surveyed. The full spectrum of particle size groups encountered is modeled by a hybrid partially equilibrated mixture approach, whereby a portion of the particulaies is treated via nonequilibrium techniques. The influence of particulates on Mach disk locations and the treatment of particulate relaxation and turbulent mixing behind Mach disks is discussed in detail. A preliminary approach for treating the turbulent dispersion of particulates is presented which relates the particle diffusivity to that of the gas phase via local time scale relations. This approach is assessed via comparisons with available data extracted from the Russian literature.
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