Translated Title
The Structure of Gas Distribution on the Flow in and the Performance of Pressure Wave Refrigerator
Translated Abstract
The influence of some structural factors,i. e. the nozzle style,relative gas charge time on the flow in and the performance of pressure wave refrigerator are studied theoretically and experimentally in this paper. The results show that the strength of incident shock wave is the strongest when using the contraction nozzle,follows by using the laval nozzle,and is the weakest when using the uniform noz-zle when the ratio of the expansionεis from 2. 0 to 12. 0. Thus the cooling effect of pressure wave refrigerator is the strongest when using the contraction nozzle. The maximun refrigerating efficiencyηmax is increased first and then decreased when the relative gas charge timeτis increased. The optimum relative gas charge time τ is about 0. 06 when the ratio of the expansionεis 4,the ratio of length to diameter L/d is 400 and the relative depth of the jet hole in gas distribution is 0. 55. Whenτ＞0. 075,the optimum pulsing frequency (fopt) is on the second peak of the refrigerating efficiency ,while fopt is on the third peak of the refrigerating efficiency when τ＞0. 075.
Translated Keyword
gas distribution
nozzle
pressure wave refrigerator
refrigerating efficiency
validation
Access Number
WF:perioarticalzlxb201404016
