The high-temperature port pressure is an important parameter affecting the refrigeration performance of the gas wave oscillation tube. By establishing a double-opening gas wave oscillating tube experimental platform, the relationship between the cooling temperature drop of the gas wave oscillating tube and the high-temperature port pressure was quantitatively measured. In order to analyze the internal mechanism of the phenomenon, an analysis model of the gas wave oscillating tube was established. It was found that the temperature drop of the whole machine increased first and then decreased with the increase of the high-temperature port pressure. The pressure of high-temperature port had the optimal value. When the high-temperature port pressure was low, the interface between the incident gas of the gas wave oscillating tube and the original gas in the tube was discharged from the high-temperature port of the oscillating tube, so that the reflux gas at normal temperature in the low-temperature port increased, and blended with the low-temperature incident gas after expansion in the tube, reducing the cooling performance of the oscillating tube. The simulation results showed that when the high temperature port pressure were 0.10 and 0.14 MPa, the ratio of high-pressure gas in HT to total high-pressure gas was 7.4% and 4.9%, respectively. As the pressure of the high-temperature port increased, the cooling performance was improved. However, the high-temperature port pressure also promoted the increase of the reverse compression wave intensity. The reverse compression wave pressures were 0.107 and 0.135 MPa at high-temperature port pressure of 0.11 and 0.14 MPa, respectively, which was not conducive to refrigeration. Therefore, the blending degree of the incident high pressure gas and the high-temperature side gas and the reverse compression wave pressure were the two factors why the high temperature port pressure had an optimum value.
Peiqi LIU Chuhan GAO Xiang LI Yang YU Dapeng HU
. Mechanism analysis of refrigeration performance of gas wave oscillation tube influenced by high-temperature port pressure[J]. The Chinese Journal of Process Engineering, 2020
, 20(1)
: 12
-19
.
DOI: 10.12034/j.issn.1009-606X.219129
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