扩缩管充分发展层流的强化传热场协同分析  

Field synergy analysis on heat transfer enhancement of fully developed laminar flow in a diverging-converging tube

作　　者：肖春华[1,2] 桂业伟[1] 朱国林[1] 

机构地区：[1]中国空气动力研究与发展中心空气动力学国家重点实验室,四川绵阳621000 [2]北京航空航天大学航空科学与工程学院,北京100083

出　　处：《空气动力学学报》2013年第3期338-343,共6页Acta Aerodynamica Sinica

基　　金：国家自然科学基金委员会与中国民用航空局联合资助项目(批准号:61179075)

摘　　要：采用二维轴对称不可压缩层流N-S方程,利用有限体积方法和SIMPLE算法,在雷诺数100～1300范围内,对轴对称周期性扩缩管的充分发展层流流动和传热特性进行了数值模拟,重点研究了不同雷诺数、几何外形与换热强度的关系,并利用场协同理论对计算的结果进行了分析,获取了层流态下扩缩管对流换热强度随雷诺数、几何尺寸变化的规律,对进一步研究扩缩管换热问题、探讨强化传热理论和发展换热技术均有实际意义。Using the two-dimensional symmetric lation of the fully developed laminar flow of axially incompressible laminar N-S equation, a numerical simu symmetric periodic diverging-converging tubes at Reyn olds number 100 to 1300 and of the relevant heat transfer characteristics, is carried out with finite volume method and SIMPLE algorithm, with emphases putting on the relationships between different Reynolds num- bers, geometries and heat transfer intensities. The computational results are analyzed by field synergy analy- sis theory. Variations of convection heat transfer intensity versus Reynolds number and geometry are ob- tained under the laminar flow. The simulation is of practical importance for studying heat transfer enhance ment characteristics and developing heat transfer techniques.

关 键 词：扩缩管 充分发展 层流 强化传热 场协同 

分 类 号：TK124[动力工程及工程热物理—工程热物理]