脉动射流对振荡管性能影响的实验研究  

Experimental Study on Cooling Effect of Oscillating Tube

作　　者：林孝英[1] 黄廷夫[1] 李学来[1] 

机构地区：[1]福州大学化学化工学院,福建福州350002

出　　处：《制冷》2008年第1期17-20,共4页Refrigeration

摘　　要：本文就充排气时间比、膨胀比（ε）、射流频率等对制冷效率叩的影响进行了实验研究，并进行了理论分析。结果表明，在ξ=O．0405—0．1842范围内，制冷效率（η）随ξ的增大而提高；η随射流频率（f）的变化出现多个峰值，且第二个峰值点的效率比第一个峰值点高；随着膨胀比（ε）的增大，η和fopt都略有增大，且低ε下的增幅比高ε下的大。The influence of some factors, i.e.the ratio of gas charge time to gas exhaust time （ξ）, the ratio of the expansion （ε） , the frequency of the jet flow （f） are studied experimentally in this paper.The results show that： the refrigerating efficiency will be heightened by augmentingε when ξ is in 0.0405 to 0.1842; the highest cooling efficiency will be heightened a little by increasing ξ; the refrigerating efficiency will be fluctuated and appear many peak （peak oscillating effect） according to f. And in this dissertation, the refrigerating efficiency of the second peak is higher than the first peak.

关 键 词：压力波制冷机 振荡管 制冷效率 激波 脉动射流 

分 类 号：TQ051.5[化学工程]