Characteristics study on the oscillation onset and damping of a traveling-wave thermoacoustic prime mover  

作　　者：Tao JIN Chang-song MAO Ke TANG Hao ZHENG Guo-bang CHEN 

机构地区：[1]Institute of Refrigeration and Cryogenics, Zhejiang University, Hangzhou 310027, China

出　　处：《Journal of Zhejiang University-Science A(Applied Physics & Engineering)》2008年第7期944-949,共6页浙江大学学报（英文版）A辑（应用物理与工程）

基　　金：the National Natural Science Foundation of China (Nos. 50776075 and 50536040);the Natural ScienceFoundation of Zhejiang Province (No. Y107229), China

摘　　要：This paper focuses on the temperature and pressure characteristics of a Swift-Backhaus type traveling-wave thermoacoustic prime mover during its onset and damping processes,in order to understand the intrinsic mechanism of thermoacoustic oscillation onset and the feasibility of using low-grade thermal energy based on a low onset temperature. The influences of heat input and filling pressure on hysteretic loop,due to the noncoincidence between onset and damping processes,are measured and analyzed. The condition for the occurrence of hysteresis is also briefly discussed.This paper focuses on the temperature and pressure characteristics of a Swift-Backhaus type traveling-wave thermoacoustic prime mover during its onset and damping processes, in order to understand the intrinsic mechanism ofthermoacoustic oscillation onset and the feasibility of using low-grade thermal energy based on a low onset temperature. The influences of heat input and filling pressure on hysteretic loop, due to the noncoincidence between onset and damping processes, are measured and analyzed. The condition for the occurrence of hysteresis is also briefly discussed.

关 键 词：THERMOACOUSTICS Onset and damping Hysteretic loop 

分 类 号：O424[理学—声学]