行波型热声发动机谐振管的调相作用  

Phase modulation of resonator in the traveling wave thermoacoustic prime mover

作　　者：谢秀娟[1] 李青[1] 李正宇[1] 李强[1] 

机构地区：[1]中国科学院理化技术研究所

出　　处：《低温工程》2006年第1期35-39,共5页Cryogenics

基　　金：国家自然科学基金(E060107-50276064);中国科学院知识创新工程重要方向性项目(KJCX2-SW-W08)支持

摘　　要：基于环形圈加谐振管的热声发动机的两自由度模型构思,在调相机理上开展了工作。系统分析和仿真研究表明:谐振管对于热声发动机系统不仅是决定系统工作频率、储能和稳定工况,还对行波型热声发动机的声场产生调相作用。针对不同形式的谐振管(谐振管,谐振腔和容腔),以及不同体积的容腔负载(10 L,20 L,40 L)进行仿真计算。研究不同条件下,对回热器处的压力和体积流率之间的相位调节作用及声功的影响。在此基础上,对回热器起点、中点和终点3个位置的流体微团进行分析,得到不同位置的p-V图。结果表明,谐振管的确起到调节声场相位的作用,容腔形式的谐振管更有利于回热器内声场的优化,而容腔的体积大小对回热器声场的影响不大。The mechanism of phase modulation is investigated based on the model of two degree of freedom in the thermoacoustic prime mover consisting of a looped tube and the resonator. Investigation shows that resonator not only determines the frequency of system, deposits energy and stabilization of operating conditions, but also modulates the phase of acoustic field in the traveling wave thermoacoustic prime mover. The influences of the different types of resonators （including resonator, cone and compliance） and the different volumes of compliances （ 10 L, 20 L, 40 L） on the phase modulation and acoustic power are analyzed in the regenerator. The fluid parcels are analyzed at different positions in the regenerator and p-V figures are present. It is inferred that the resonator can modulate the phase of acoustic field, and the compliance is preferred to the optimization of acoustic distribution in the regenerator. The volume of compliance has a little influence on the acoustic distribution.

关 键 词：相位调节 声场分布p-V图 行波型热声发动机 

分 类 号：TB611[一般工业技术—制冷工程]