Hits:

Indexed by:会议论文

Date of Publication:2016-01-01

Included Journals:CPCI-S

Volume:53

Page Number:625-629

Key Words:Gas wave; Refrigeration efficiency; Multi-stage oscillation; Time-averaged jet flow

Abstract:With the external micro-jet to stimulate main jet flow to generate multi-stage oscillation and get time-averaged pulse, a novel high-efficiency jet mode of static gas wave refrigeration is proposed. Investigation made by CFD indicates that the loss of total pressure is less than 45% of that of the self-excited oscillation, jet flow total pressure retention rate increases from less than 70% to nearly 90%. On this basis, the external excited multi-stage oscillation performance is investigated and time-averaged multiple jets are acquired. The new mode overcomes the inherent defect that the time of the exhausting phase is seriously insufficient and the pressure in the gas wave tube is excessive, also makes up for the shortcoming that the jet period and quantity of flow injected into every tube are not the same. Meanwhile, the refrigeration efficiency of gas wave tube could be increased more than 15% for the reason of the characteristics of time-average.