The network method for modeling thermoacoustic engines is described. Some simulation results on acoustic fields and phases in engine, especially in the thermoacoustic stack are presented and analyzed. The effects of some key factors on performance of stack and engine system are simulated and discussed. These effect factors include the spaces of plates of stack, the position of stack in engine system, the source parameter of stack, and the mean working pressure of the engine system.
ZHANG Xiaoqing Li Qing GUO Fangzhong(Cryogenic Laboratory, Huazhong University of Science and Technology Wuhan 430074) ( Cryogenic Laboratory, the Chinese Academy of Sciences Beijing 100080)
Thermoacoustic engine has been concerned recently because of its advantages of no moving parts and no pollution. A prime mover is built and its characteristics of onset temperature difference, frequency and output acoustic power are measured and analyzed. A thermoacoustic refrigerator driven by this prime mover had been tested. It may develop a temperature difference of 25 K across the regenerator and a lowest temperature of -8℃ was achieved with the frequency, input power and the static pressure 81.7 Hz, 800 W and 1 Mpa respectively.
DONG Kaijun, LI Qing, GUO Fangzhong (Cryogenic Laboratory, Huazhong University of Science and Technology Wuhan)
