热声回热器的频率特性研究  

Frequency character of regenerator in thermoacoustic devices

作　　者：赵爽[1,2] 李正宇[1] 李青[1] 高岗[1,2] 

机构地区：[1]中国科学院理化技术研究所低温工程学重点实验室,北京100190 [2]中国科学院研究生院,北京100049

出　　处：《低温工程》2011年第3期20-23,共4页Cryogenics

基　　金：国家自然科学基金(50820181)资助

摘　　要：引入传输损耗的概念,采用集总参数和分布参数两种方法,分析了热声热机中连续结构回热器的频率特性,两者的计算结果十分接近。同时,考虑集肤效应的影响,研究了不同出口条件下回热器的传输损耗特性,结果表明,出口条件的变化不会对回热器的固有频率产生影响,进一步证明了频率特性是回热器的固有属性。这种理论计算的方法为实验法测量回热器的频率特性提供了一定的依据。Frequency character of regenerators in thermoacoustic devices was analyzed by applying the concept of transmission loss.Both lumped parameter method and distributed parameter method were used to calculate the transmission loss and the results of which were very close.Meanwhile,skin effect and influence of different outlet conditions were considered.The calculation shows that the change of the outlet condition will not affect the natural frequency of the regenerator.Furthermore,on the basis of the theoretical method mentioned,experiments to measure the frequency character of regenerator can be organized.

关 键 词：回热器 特征频率 传输损耗 热声 

分 类 号：TB65[一般工业技术—制冷工程] TK124[动力工程及工程热物理—工程热物理]