Specific Features of Unsteady Exhaustion of a Gas-Particle Mixture into Vacuum
D. V. Sadin, V. M. Varvarskii
Alexander Mozhaysky Military Space Academy, St. Petersburg, 197198, Russia
Keywords: истечение в вакуум, газодисперсная среда, жесткость уравнений, TVD-схема, exhaustion into vacuum, gas--particle mixture, stiffness of equations, TVD scheme
Abstract
Two-dimensional unsteady exhaustion of a one-velocity gas-particle mixture into vacuum is analyzed in extreme equilibrium cases of heat transfer. Domains of existence of a one-dimensional Riemann wave and side expansion wave and the boundary of the expansion region are obtained. In the case of temperature equilibrium, the reverse flow is found to occupy a large region extending beyond the boundaries defined by the angles of expansion of an ideal gas and a gas-particle mixture with thermally insulated phases. Exhaustion of a nonequilibrium two-phase medium in terms of velocities and temperatures into vacuum is numerically simulated. It is demonstrated that a barrel structure with wavy expansion of the gas and combined discontinuities in the expanding gas-particle mixture is formed.
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