非局域热平衡理论下斯特林热机回热器温度场分布数值分析  

Numerical Analysis of Temperature Distribution of Stirling Engine Regenerator under Non-local Thermodynamics Equilibrium Theory

作　　者：刘繁茂 蒋彭 刘永祥 Liu Fanmao;Jiang Peng;Liu Yongxiang(Engineering Research Center for Advanced Mining Equipment of Ministry of Education,Hu′nan University of Science and Technology, Hu′nan Xiangtan 411201, China)

机构地区：[1]湖南科技大学先进矿山装备教育部工程研究中心

出　　处：《机械科学与技术》2019年第6期863-869,共7页Mechanical Science and Technology for Aerospace Engineering

基　　金：国家自然科学基金项目(No.51576061);湖南省科技计划项目(2012FJ6121);湖南省自然科学基金项目(2016JJ2052);湖南省教育厅资助科研项目(09C406)资助

摘　　要：如何获得较为准确的回热器温度场分布,一直是碟式太阳能斯特林热机研究中的热点问题。本文构建了基于非局域热平衡理论的三维多孔介质动量方程与能量方程,以数值模拟的方法,探讨了回热器长度和分层、入口速度、填充介质孔隙率、气体工质材料及填充丝网目数等因素对于斯特林发动机回热器温度场分布的影响规律。结果表明:金属丝网孔隙率和气体工质流动速度对于金属丝网回热器的换热性能影响较大,适当地延长回热器长度能有效提高回热器的换热性能。How to obtain a more accurate temperature distribution of regenerator has been a hot issue in the research of solar energy dish Stirling engine. In this paper, the momentum equation and energy equation of porous media based on non-local heat balance theory are established. With numerical analysis method, this paper discusses the influence law of the length of regenerator, layered wire mesh, inlet velocity, filling medium porosity, gas laser material, and the number of wire mesh on the temperature field distribution of the Stirling engine regenerator. The results show that the metal screen porosity and gas flow rate for wire mesh have a greater influence on the heat transfer performance of the regenerator. The appropriate extension of the length of regenerator can effectively improve the heat transfer performance of the regenerator.

关 键 词：斯特林热机 回热器 非局域热平衡 数值模拟 

分 类 号：TK11[动力工程及工程热物理—热能工程]