二相流ノズル出口に発生する衝撃波による圧力変動に関する研究

抄録

Recently, the refrigeration air conditioning or heat pump system using the two-phase flow ejector is beginning to appear, as the efficiency of the ejector cycle is improved largely in comparison with the conventional system. Shock and expansion waves can occur in the internal flow fields of the ejector, and the effect of the pressure fluctuation by those waves must be considered on the designs of the ejector. In this study, the pressure fluctuation of the shock wave appeared at the outlet of the two-phase flow nozzle are measured by using the HFO1234 refrigeration cycle. It was clarified by experiment that the pressure fluctuations are increased with the strength of the shock waves for each inlet quality.