超疏水管束流动传热数值分析  

Numerical Analysis of Flow and Heat Transfer on Super Hydrophobic Tube Bundles

作　　者：周少东 史新民[3] 俞齐鑫 王子成 王永强 鲁宛晴 ZHOU Shaodong;SHI Xinmin;YU Qixin;WANG Zicheng;WANG Yongqiang;LU Wanqing(Institute of Advanced Manufacturing and Modern Equipment Engineering Technology,Jiangsu University,Zhenjiang 212013,China;Jiangsu Key Laboratory of Green Process Equipment,Changzhou 213164,China;School of Inelligent Equipment,Changzhou College of Information Technology,Changzhou 213164,China)

机构地区：[1]江苏大学先进制造与现代装备工程技术研究院,江苏镇江212013 [2]江苏省绿色过程装备重点实验室,江苏常州213164 [3]常州信息职业技术学院智能装备学院,江苏常州213164

出　　处：《现代车用动力》2023年第2期25-29,59,共6页Modern Vehicle Power

基　　金：常州市应用基础研究(CJ20220033);江苏高等学校自然科学基金(20KJB470010)。

摘　　要：为了研究超疏水表面的滑移特征对散热器管束的流动减阻及传热强化的影响,针对层流状态下滑移边界条件对二维圆柱表面的流动及传热特性影响进行了数值分析。基于ANSYS FLUENT18.0软件,利用有限元方法计算了雷诺数Re=120时,不同滑移长度下横掠二维圆柱的流场及温度场。圆柱表面采用了Navier模型来表征超疏水滑移现象。计算结果表明:圆柱表面综合传热性能是随着滑移长度增加而呈线性增加的趋势,而圆柱表面综合摩擦阻力是随着滑移长度增加而呈线性减小的趋势;圆柱表面附近速度边界层厚度是随着滑移长度增加而逐渐变薄,明显变薄的发生区域是在圆柱前驻点附近;圆柱表面局部摩擦性能是随着滑移长度的增加而在前驻点区域减小明显,在后驻点区域变化不明显,这也导致了相似的圆柱表面局部传热性能的变化。上述流动传热特性结果将为高效-紧凑型散热器的研究提供参考。In order to study the efect of slip characteristics of super hydrophobic surfaces on the flow drag reduction and heat transfer enhancement of radiator tube bundles,the influence of slip boundary conditions on the flow and heat transfer characteristics of two-di-mensional cylindrical surfaces in laminar flow was numerically analyzed.The research method is mainly based on the ANSYS FLU-ENT18.0 sofware.The flow field and temperature field of the two-dimensional cylinder under dfferent slip lenghs are calculated by fi-nite element method when Re=120.Navier model is used to characterize the superhydropbobic slip on the eylinder surface.The results show that:the overall heat transfer performance of the ceylinder surface increases linearly with the increase of the slip length,while the overall friction resistance of the cylinder surface decreases linearly with the increase of the slip length;The thickness of velocity bound-ary layer near the eylinder surface becomes thinner with the increase of slip length;The local friction performance of the cylinder sur-face decreases significantly in the front stagnation region with the increase of the slip length,but docs not change significantly in the rear stagnation region,which also leads to the change of the local heat transfer performance of the similar cylinder surface.The above results of flow and heat transfer characteristics will guide the development of efficient compact radiator.

关 键 词：二维圆柱 流动减阻 传热 超疏水 滑移边界 

分 类 号：TK124[动力工程及工程热物理—工程热物理]