【作者】 郭永飞； 陈曦； 张华； 庞常伟； 刘颖；

【Author】 Guo Yongfei Chen Xi, Zhang Hua Pang Changwei Liu Ying (University of Shanghai for Science and Technology, School of Energy and Power Engineering, Shanghai, 200093, China)

【机构】 上海理工大学能源与动力工程学院；

【摘要】 回热器是蝶式太阳能斯特林发动机的重要组成部分,对小型蝶式太阳能斯特林发动机回热器流阻进行了分析。基于有限时间热力学理论和方法,利用时间比例的概念,对斯特林发动机回热器内工质在一个周期内的流动建立模型并分析,结果表明:回热器内所填充丝网类型、填充层数、工质流过回热器的雷诺数影响着工质通过回热器的压降和工质流阻损失,雷诺数较小时,压降值、阻力损失及其增幅均较小,随着雷诺数的不断增大,压降值、阻力损失及其增幅均显著增大。更多还原

【Abstract】 The regenerator is the key part of the solar Stirling engine. In this paper, the flow resistance of regenerator in a small-scale solar Stirling engine is analyzed. Based on the finite-time thermodynamics theory and method, useing the conception of Time Scale., the flow model of the working gas in the regenerator of the Stirling engine in a cycle of motion is built up and analyzed, the result shows that the pressure drop and the loss of flow resistance of the working gas in the regenerator are influenced by Reynolds number, the type and the number of the mesh screens in the regenerator. The pressure drop and loss of flow resistance of the working gas increase significantly with the increase of Reynolds number.更多还原