行波型热声发动机的二维数值模拟研究  

Two dimensional numerical simulation of traveling wave thermoacoustic engine

作　　者：解丹 张世强 赵巍[1] 李洪宇[1] XIE Dan;ZHANG Shiqiang;ZHAO Wei;LI Hongyu(School of Materials and Metallurgy,University of Science and Technology Liaoning,Anshan,114051,China)

机构地区：[1]辽宁科技大学材料与冶金学院

出　　处：《辽宁科技大学学报》2019年第2期142-148,共7页Journal of University of Science and Technology Liaoning

基　　金：国家自然科学基金(51206074)

摘　　要：基于线性热声理论与动力学基本方程建立了热声发动机的二维一阶频域数学模型,并根据有限元中的加权余量法将数学模型转化为便于求解的矩阵形式。运用MATLAB软件自主编程,对行波型热声发动机系统内的声场特征进行了二维数值模拟。结果表明,在谐振管内,一阶各波动量呈现良好的正弦曲线分布现象。在回热器单个流道内,从冷端到热端,由于存在较大的阻抗,压力振幅与温度振幅有明显的下降,而速度振幅则逐渐升高。Based on linear thermoacoustic theory and basic dynamic equation,a two-dimensional first-order frequency domain mathematical model of thermoacoustic engine is established. According to the weighted residual method in the finite element analysis,the mathematical model is transformed into a matrix form which is easy to solve. Therefore,two dimensional numerical simulations of sound field characteristics in the thermoacoustic engine system were carried out by using software MATLAB. The results show that,in the resonator, the first order fluctuations exhibit a good sinusoidal distribution. In a single channel of the regenerator, from the cold end to the hot end,the pressure and temperature amplitudes decrease obviously due to the existence of large impedance,while the velocity amplitude increases gradually.

关 键 词：热声发动机 数值模拟 有限元 加权余量法 

分 类 号：TK402[动力工程及工程热物理—动力机械及工程]