摘要
建立了梭形翅片组成的不同结构尺寸的周期性流道模型,使用ANSYS Fluent软件研究了不同进口雷诺数和不同翅片结构参数对翅片组成流道内的流体流动和换热特性的影响。研究表明:传热系数随雷诺数的增加而增加,且变化呈线性。压降随雷诺数增加不断增大,且增加的幅度逐渐变大.传热系数和压降均随梭形翅片高度的变化先减小后增大,变化曲线均存在波谷,且最小值均出现在翅片高度b在2 cm和3 cm之间。传热系数随着翅片列间距的增加逐渐减小,在翅片列间距c为20 mm附近变化幅度变小。压降随着翅片列间距的增加逐渐减小。传热系数和压降均随翅片行间距d的增加而逐渐减小,但减小的幅度逐渐变小.在本文研究范围内,为了获得更好的综合性能推荐2000≤Re≤6000,b≤2mm,19 mm≤c≤21mm,6 mm≤d≤7 mm。
A periodic flow channel model with different structural dimensions composed of staggered shuttle shaped fins was established. The effects of different Reynolds numbers and different shuttle shaped fin structure parameters on the fluid flow and heat transfer characteristics in the staggered shuttle shaped fins were studied by using ANSYS Fluent software. The results show that the heat transfer coefficient increases with the increase of Reynolds number, and the change is linear. The pressure drop increases with the Reynolds number increasing, and the increase rate is getting bigger. Both the heat transfer coefficient and the pressure drop decrease first and then increase with the increase of the height of shuttle shaped fins. There are troughs in all curves, and the minimum values appear at the fin height b between 2 cm and 3 cm. The heat transfer coefficient decreases with the increase of the coluinn spacing of the fins, and c is 20 ram. The pressure drop decreases as the variation range is smaller when the fin spacing the column spacing of the fins increases. Both the heat transfer coefficient and the pressure drop decrease with the increase of the line spacing d, but the decreasing amplitude becomes smaller. In this context, in order to obtain better comprehensive performance, it is recommended that 2000≤ Re ≤6000, b≤ 2 mm, 19 mm ≤ c ≤ 21 mm, and 6 mm≤ d ≤ 7 mru.
出处
《工程热物理学报》
EI
CAS
CSCD
北大核心
2017年第12期2670-2673,共4页
Journal of Engineering Thermophysics
基金
国家自然科学基金资助项目(No.51376163
No.51476147)
关键词
梭形翅片
数值模拟
换热
流体流动
shuttle shaped fin
numerical simulation
heat transfer
fluid flow
