板叠式回热器的特征频率  

Characteristic frequency research on stack regenerator

作　　者：辛天龙[1] 刘益才[1] 黄谦[1] 张明研[1] 马卫武[1] 杨培志[1] 

机构地区：[1]中南大学能源科学与工程学院,长沙410083

出　　处：《低温工程》2009年第1期31-35,共5页Cryogenics

基　　金：国家自然科学基金资助项目(50676110)

摘　　要：提出回热器特征频率的概念,以热声器件的热动力学理论为基础,建立起热声回热器的分布参数网络模型,以实例分析并用Matlab编程计算回热器不同工质下的特征频率,得出了单一He气和He、Ar混合气体下回热器的特征频率分别为565 rad/s和1300 rad/s以及回热器的阻抗特性和不同工作压力对回热器阻抗影响的关系图。通过计算分析以便为回热器与系统更好地匹配,以及为回热器热声转换效率的提高提供依据。Given the concept of the characteristic frequency for regenerator, distributed parameter network model of thermoacoustic stack was respectively built on basis of thermodynamics theory of stack. The practical examples of calculations using Matlab program of characteristic frequency with different refrigerants in regenerator were anylied. The characteristic frequency of single gas He and He-Ar mixed gas was 565 rad/s and 1 300 rad/s respectively, the impedance characteristics of regenerator and impedance plans of different work pressure in the regenerator were obtained. It shown that the analysis can provide basis for regenerator to match system better and get higher heat conversion efficiency.

关 键 词：回热器 网络模型 特征频率 匹配 

分 类 号：TB651[一般工业技术—制冷工程]