内翅片管中堵塞芯管直径优化的数值模拟  

Optimization simulation of heat transfer performance of internally finned tubes with blocked core-tube

作　　者：林梅[1] 王斗[1] 吴峰[1] 曾敏[1] 王秋旺[1] 

机构地区：[1]西安交通大学动力工程多相流国家重点实验室,陕西西安710049

出　　处：《化工学报》2007年第2期322-326,共5页CIESC Journal

基　　金：教育部霍英东教育基金会高等院校青年教师基金项目(91056);国家自然科学基金项目(50323001)。~~

摘　　要：Heat transfer and fluid flow performance in internally finned tube with blocked core-tube was numerically investigated with the realizable k-ε turbulence model and wall function method.The working fluid was air.The numerical method was validated by comparing the calculated results with available experimental data.It was found that there existed an optimal value for the ratio of core-tube outside diameter to outer-tube inside diameter, and this optimal value decreased with the increase of air flow rate.The optimal ratio was about 0.5—0.625 in the range of studied parameters.Meanwhile under the condition of identical pressure, the optimal ratio was also about 0.44—0.56.The conclusion is useful for the design of this kind of internally finned tubes.Heat transfer and fluid flow performance in internally finned tube with blocked core-tube was numerically investigated with the realizable k-ε turbulence model and wall function method, The working fluid was air. The numerical method was validated by comparing the calculated results with available experimental data. It was found that there existed an optimal value for the ratio of core-tube outside diameter to outer-tube inside diameter, and this optimal value decreased with the increase of air flow rate. The optimal ratio was about 0. 5-0. 625 in the range of studied parameters. Meanwhile under the condition of identical pressure, the optimal ratio was also about 0. 44-0.56. The conclusion is useful for the design of this kind of internally finned tubes.

关 键 词：内翅片管 湍流流动与换热 堵塞芯管 收益系数 

分 类 号：TK124[动力工程及工程热物理—工程热物理]