圆管内插入多个螺旋片的传热与流动的数值模拟研究  

Numerical Studies on Heat Transfer and Flow Characteristics for Laminar Flow in a Tube With Multiple Helical Screw Tapes

作　　者：张晓屿[1] 刘志春[1] 刘伟[1] 周路遥[1] 

机构地区：[1]华中科技大学能源与动力工程学院,湖北武汉430074

出　　处：《工程热物理学报》2013年第2期310-313,共4页Journal of Engineering Thermophysics

基　　金：国家重点基础研究发展计划(No.2007CB206903);国家自然科学基金资助项目(No.51036003;No.50721005)

摘　　要：本文讨论了圆管内对流换热的机理,在此基础上,基于对流换热的优化理论,设计一种新的纵向扰流装置,即在管内有间隔地插入多个螺旋片,建立了相应的物理和数学模型,并对其传热和流动特性进行了计算模拟。结果表明,在圆管内有间隔地插入多个螺旋片可以有效提高换热与流动的综合性能,其PEC达到2.90～5.10。The present study discusses the mechanism of convective heat transfer inside the tube, on this basis, based on the optimization theory of convective heat transfer; we design a new type longitudinal devise for disturbing fluid, which is inserting multiple helical screw tapes in the tube with regular space; the corresponding physical and mathematical models are set up and its heat transfer and flow characteristics are numerically simulated. The results show that the tube inserted with the multiple helical screw tapes can improve the flow and heat transfer performance effectively, the value of PEC varied between 2.90 and 5.10.

关 键 词：螺旋片 数值模拟 核心流 强化传热 场物理量协同 

分 类 号：TK124[动力工程及工程热物理—工程热物理]