Influence of resonator diameter on a miniature thermoacoustic Stirling heat engine  

作　　者：ZHOU Gang LI Qing LI ZhengYu LI Qiang 

机构地区：[1]Cryogenics Laboratory, Huazhong University of Science and Technology, Wuhan 430074, China [2]Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100080, China

出　　处：《Chinese Science Bulletin》2008年第1期145-154,共10页

基　　金：the National Natural Science Foundation of China (Grant Nos. 90407012 and 50276064)

摘　　要：A small scale thermoacoustic Stirling engine (TASHE) is simulated according to the linear ther-moacoustic theory. The computed results show that in a small scale thermoacoustic Stirling heat en-gine, the diameter of the resonance tube might have important influences on the working frequency and the performance of the engine, which are always neglected in a large scale system. Likewise, the analysis and experimental results show that in order to obtain better engine performance, the diameter of the resonance tube must be chosen appropriately according to the looped tube dimension and the input heating power. This provides an effective way to miniaturize the thermoacoustic Stirling heat en-gine. According to the computation and analysis, a small scale engine was built, the resonance tube length and diameter of which were about 350 mm and 20 mm, respectively, and the working frequency was about 282 Hz. When the input heating power was about 637 W, the maximal peak to peak pressure amplitude and pressure ratio reached 0.22 MPa and 1.116, respectively, which were able to drive a thermoacoustic refrigerator or an electrical generator.A small scale thermoacoustic Stirling engine （TASHE） is simulated according to the linear thermoacoustic theory. The computed results show that in a small scale thermoacoustic Stirling heat engine, the diameter of the resonance tube might have important influences on the working frequency and the performance of the engine, which are always neglected in a large scale system. Likewise, the analysis and experimental results show that in order to obtain better engine performance, the diameter of the resonance tube must be chosen appropriately according to the looped tube dimension and the input heating power. This provides an effective way to miniaturize the thermoacoustic Stirling heat engine. According to the computation and analysis, a small scale engine was built, the resonance tube length and diameter of which were about 350 mm and 20 mm, respectively, and the working frequency was about 282 Hz. When the input heating power was about 637 W, the maximal peak to peak pressure amplitude and pressure ratio reached 0.22 MPa and 1.116, respectively, which were able to drive a thermoacoustic refrigerator or an electrical generator.

关 键 词：声学 共振器 谐振管 相位转移 

分 类 号：O42[理学—声学]