基于ANSYS的百叶窗翅片换热器的流体优化周俊杰.pdf

基于ANSYS 的百叶窗翅片换热器的流体优化 [周俊杰 牛玲] [郑州大学，450001] [ 摘 要 ] 紧凑式换热器广泛应用在制冷、空调、汽车、能源、石油、化工等许多工程领域，百叶窗翅片 表面是强化换热的一种十分有效的方式，它在紧凑式换热器中得到了广泛的应用。本文主要采 用 ANSYS 中的 Fluent 模块及 Parameter 模块，对一定倾角下固定百叶窗倾角的百叶窗翅片 空气侧的流动与换热过程进行三维数值模拟及优化。分别以入口速度与翅片厚度为输入参数， 进而考察该两种参数对百叶窗翅片的流动换热性能的影响。随着进口速度的增加，百叶窗翅片 的f 因子逐渐减小，并趋于缓和，Nu 数线性增加；随着翅片厚度的增加，百叶窗翅片的j 因子 几乎保持不变，而 f 因子是稳中有升。百叶窗翅片强化传热的实质是：百叶窗翅片的存在增加 了扰流，提高了百叶窗翅片换热器的换热性能。 [ 关键词 ] 百叶窗翅片，流体优化，ANSYS ，空气侧 Optimization on Louver Fin Heat Exchanger’s Fluid Based On ANSYS [Zhou Jun Jie, Niu Ling] [ZZU, 450001] [ Abstract ] Compact heat exchanger has been widely used in many engineering fields such as refrigerating, air conditioning, automobile, energy, petroleum, and chemistry. Louver fin surface is a very efficient method of enhancing heat transfer for compact heat exchanger. In this article, the Fluent module and Parameter module of ANSYS are used, to study and optimize louver fin’s flow and heat transfer in the air side, which is in a louver fin angle, with the inlet velocity and fin thickness as input parameters. With the increase of inlet velocity, the f of louver fin decreases, and easies, Nu number increases linearly; With the increase of fin thickness, the j factor of louver fin is nearly unchanged, and f factor increases slowly. The essence of heat transfer enhancement of louver fin is: the existence of louver fin increases turbulence, improves the louver fin heat transfer performance of the heat exchanger. [ Keyword ] Louver fin, Fluid optimization, ANSYS, Air side