MIXING OF THE CONFINED JET OF MIST FLOW

Confined jets of two-phase mist flow are important in the development of a two-phase ejector for the refrigeration cycle, However, the flow characteristics of the two-phase ejector have not been elucidated to d ate due to the nonequilibrium of velocity and temperature. In this stu dy, the mixing characteristics of two-phase mist flow in the two-phase ejector were investigated experimentally. The pressure increases in t he mixing section and the diffuser of the ejector were measured. The f ollowing results were obtained by comparison of the measured pressure increase with that calculated using a simple theory. Increasing the le ngth and decreasing the diameter of the mixing section were effective for raising the pressure. The energy efficiency of the two-phase eject or used in this experiment was approximately 10%. This efficiency shou ld be increased by improving the mixing characteristics of the ejector and the nozzle efficiency.