中文摘要：

将两种现行的热流强化换热技术结合起来,提出螺旋内肋扭曲管这一新型强化换热管,利用ANSYS ICEM CFD对该强化换热管进行网格划分和网格独立性考核,利用Fluent分析比较了螺旋内肋扭曲管、扭曲管和圆管3种换热管的雷诺数Re在2300~50000范围内的换热和流阻性能,得出其努赛尔数Nu、阻力系数f、等泵功准则下综合评价指标PEC及热势容差-火积耗散ΔE的变化关系,结果表明,螺旋内肋扭曲管具有优于扭曲管的综合换热性能,具有较好的研发潜力和较高的工程应用前景。

英文摘要：

Based on the combination of two existing heat flux enhanced heat exchange technology,a new spiral inner fin twisted enhanced heat exchange tube was put forward. Meshing and grid independence assessment was conducted by utilizing the ANSYS ICEM CFD software and the heat exchange and flow resistance performance of three kinds of heat exchange tubes including spiral inner fin twisted tube,twisted tube and round tube was compared for different Re number ranging from 2300 to 50000 by utilizing the Fluent software. The relationship between the Nu number,drag coefficient f,comprehensive evaluation index PEC based on equal pump power standard and thermal potential capacity difference（ entransy dissipation） ΔE was achieved. The result shows that the comprehensive heat exchange performance of spiral inner fin twisted tube is superior to that of twisted tube with stronger research and development potential and broader prospect in engineering application.