ノズル内の亜音速ミスト流中に発生する速度緩和および温度緩和を伴う衝撃波(流体工学, 流体機械)

抄録

The nozzle used in total-flow system has an important role to convert the thermal energy of low temperature heat to the kinetic energy. As the flow in the nozzle is suspending small droplets, there exist velocity and temperature relaxation between gas and liquid phase. The shock waves caused by the velocity and the temperature relaxation in the nozzle are researched theoretically in this paper. It is shown that shock waves appear in the divergent section of the nozzle where the frozen Mach number is less than unity and the equilibrium Mach number is greater than unity. Those shock waves in subsonic mist flow behave as dispersed shock waves when velocity relaxation time is small, and pseudo-like-shock waves for large relaxation time.