非线性热声热机的理论研究  

Theoretical study of nonlinear thermoacoustic heat machine

作　　者：张世强 李晓明[1] 梅宏昆 周进 ZHANG Shi-qiang, LI Xiao-ming, MEI Hong-kun, ZHOU Jin(School of Materials and Metallurgy, University of Science and Technology Liaoning, Anshan 114051, Chin)

机构地区：[1]辽宁科技大学材料与冶金学院,辽宁鞍山114051

出　　处：《真空》2018年第2期67-70,共4页Vacuum

摘　　要：以流体力学三大方程和气体状态方程为基础,建立了一维二阶非线性热声理论模型,并以该理论模型作为数学模型,采用有限元法中的加权余量法,通过编写MATLAB程序分别对行波型和驻波型热声发动机进行数值模拟,模拟计算结果成功获得了两类发动机系统内的声场特性,同时通过与线性模拟结果进行比较得到二阶量对整个系统的影响。The three equations of fluid mechanics and gas state equation are used as the foundation to establish a model of one-dimensional second order nonlinear thermoacoustic theory. We then established a mathematical model based on this theory.By using the weighted residual method in finite element method, the traveling wave and standing wave thermoacoustic engine were simulated by writing MATLAB program, respectively. The simulation results successful gain the sound field characteristic of the two types of engine in the system. At the same time, the effect of the second order on the whole system is obtained through comparison with the linear simulation results.

关 键 词：一维二阶 加权余量 声场 

分 类 号：TK121[动力工程及工程热物理—工程热物理]