速度緩和現象によって発生する高速ミスト流中の衝撃波

抄録

The two-phase flow nozzle is very important equipment in the total-flow system applied to the geothermal and the waste heat recovery power plants. As the flow in this nozzle is high-speed mist flow, we need to know the compressible fluid dynamical characteristics of the flow. In this paper, high-speed two-phase flow in one-dimensional convergent-divergent nozzle is basically researched by the theoretical consideration where the phase change is ignored. It is shown that although the Mach number is less than unity, the flow rate scarcely change by the back pressure of nozzle and the shock waves appear in the divergent section of the nozzle. These shock waves occurred in subsonic flow by the relaxation phenomenon are classified into two types. One is the disperse shock wave which appears in near equilibrium two-phase mist flow. The other is shock waves like pseudo-shock wave in near frozen flow.