自激振荡热声发动机的整机数值模拟研究  

A numerical simulation and analysis for entirely self-sustain thermoacoustic engines

作　　者：凌虹[1] 罗二仓[1] 戴巍[1] 胡剑英[1] 

机构地区：[1]中国科学院理化技术研究所

出　　处：《声学学报》2006年第4期377-384,共8页Acta Acustica

基　　金：本文研究获中科院知识创新工程重要方向项目"新一代高效环保制冷技术的研究与开发"(KJCX2-SW-W12-01)支持。

摘　　要：基于线性热声理论,以复频率作为迭代判据,给出具体的四端口网络模拟算法,对两台实际的热声发动机进行了整机数值模拟,并且结合实验结果进行了对比分析。计算结果证明它们的板叠和回热器分别处于驻波和行波为主要分量的声场中, 成为热声转换的核心。另外发现,频率误差不超过1％,相对振幅实验值约为计算值的70％,基本反映实验规律,同时解释了非线性影响是造成误差的主要原因。Thermoacoustic prime movers can steadily generate pressure oscillation without moving components on base of self-sustain effect. Here the details of simulation method for the thermoacoustic entire machine are presented, and two typical machines are calculated. A 4-port network method is used to build the transcendental equation with the frequency as a criterion to judge if the temperature distribution is correct. It is proved that the code can run robustly in wide range and output whatever results interested. Finally the calculated results are compared with the experiments of the real thermoacoustic prime mover. It shows that the error of frequency is no more than 1%, and the measurement of relative amplitude of pressure is about 70% of the calculated results. Finally some of influence factors are discussed.

关 键 词：数值模拟研究 热声发动机 自激振荡 整机 线性热声理论 频率误差 非线性影响 模拟算法 计算结果 热声转换 

分 类 号：O421[理学—声学]