于萍,耿伟轩,邵园园,郭华锋
Yu Ping,Geng Weixuan,Shao Yuanyuan,Guo Huafeng

• 1:徐州工程学院机电工程学院
• 2:江苏省秦淮河水利工程管理处

摘要(Abstract)：

为了提高碟式太阳能热发电系统的高温热管的散热特性,根据场协同理论,利用变分法构造拉格朗日函数,从而求出附加体积力的动量方程,采用数值模拟的方法研究了纵向涡流强度和进口流体雷诺数对水夹套管内对流换热和阻力特征的影响,提出了流场优化强化换热的方法。研究发现基于场协同理论纵向涡流可以明显强化水夹套管内的对流换热,但同时流体流动阻力也随之增大,并且流动阻力的增加幅度要小于对流换热增强的幅度;纵向涡流强度越大,进口流体雷诺数越大,流体具有更为优良的综合强化换热特征。
In order to improve heat dissipation behavior of high-temperature heat pipe applied in dish solar thermal power generation system,the momentum equation with a special additional volume force was calculated by constructing the Lagrange function using the variational method based on the field synergy theory. The effects of longitudinal vortex intensity Reynolds number of the inlet fluid on the characteristics of convective heat transfer and flow resistance in the jacketed pipe were studied by numerical simulation method. The method of heat transfer enhancement by optimization of flow field was proposed. The research results show that the longitudinal vortexes based on field synergy theory can significantly enhance the convective heat transfer in the jacketed pipe,but the flow resistance of the fluid increases simultaneously,and the increase amplitude of the flow resistance is less than the enhancement amplitude of heat transfer. The bigger the longitudinal vortex intensity,the larger Reynolds number of the inlet fluid,and the better integrated enhancement characteristics of heat transfer the fluid has.

关键词(KeyWords)： 强化传热;高温热管;纵向涡;场协同理论;数值模拟
heat transfer enhancement;high-temperature heat pipe;longitudinal vortexes;field synergy theory;numerical simulation

Abstract:

Keywords:

基金项目(Foundation): 江苏省高校自然科学研究面上项目(16KJB470016,17KJB460015);; 江苏省大型工程装备检测与控制重点建设实验室开放课题基金项目(JSKLEDC201411);; 徐州市科技计划项目(KH17007);; 徐州工程学院科研项目(XKY2017225)

作者(Author): 于萍,耿伟轩,邵园园,郭华锋
Yu Ping,Geng Weixuan,Shao Yuanyuan,Guo Huafeng

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