热声系统中回热器特征阻抗与传播常数的研究  

Investigation of Regenerator on Characteristic Impedance and Propagation Constant in the Thermoacoustic Apparatus

作　　者：谢秀娟[1] 李青[2] 陈熙[2] 禹智斌[1] 

机构地区：[1]中国科学院理化技术研究所,中国科学院研究生院,北京100080 [2]华中科技大学能源与动力工程学院,武汉430074

出　　处：《低温与超导》2005年第1期32-35,共4页Cryogenics and Superconductivity

基　　金：国家自然科学基金 (E0 6 0 10 7- 5 0 2 76 0 6 4 ) ;中科院知识创新工程重要方向性项目 (KJCX2 - SW- W0 8)支持

摘　　要：针对本实验室一台声驱动热声系统 ,采用传递函数法研究声驱动系统中回热器的特征阻抗和传播常数。通过调节谐振管长度 ,改变回热器表面的阻抗 ,从理论上分析了回热器网络传输方程中的声传播常数、特征阻抗与系统网络元件中的阻抗、导纳和流的关系。并且进一步讨论有无换热器以及不同的加热功率对回热器网络参数的影响。结论有利于进一步量化回热器的网络参数。An acoustic-driven thermoacoustic device has been designed and tested. The transfer function method is applied to investigate on characteristic impedance and acoustic propagation constant of the regenerator in the acoustic-driven thermoacoustic apparatus. The length of the resonator is changed in order to change the surface impedance of the regenerator. It is theoretically analyzed that characteristic impedance and propagation constant in the network transfer equation of the regenerator relate to the acoustic impedance, admittance and source item in the thermoacoustic system. Furthermore, with or without heat exchanger and different heat power influence on network parameters is also discussed. Some valuable conclusions are inferred for further investigations on the model of regenerator.

关 键 词：传播常数 阻抗 网络参数 网络传输 元件 量化 驱动 回热器 加热功率 传递函数法 

分 类 号：O422[理学—声学] TB651[理学—物理]