工程车辆翼型热管式散热器性能研究  

Research on performance of fin and wing-shaped tube radiator for construction vehicles

作　　者：刘佳鑫[1,2] 秦四成[3] 蒋炎坤[1] 何书默 Liu Jiaxin Qin Sicheng Jiang Yankun He Shumo(School of Energy and Power Engineering, Huazhong University of Science and Technology, Wuhan 430074, China College of Mechanical Engineering, North China University of Science and Technology, Tangshan 063009, Hebei China College of Mechanical Science and Engineering, Jilin University, Changchun 130025, China)

机构地区：[1]华中科技大学能源与动力工程学院,湖北武汉430074 [2]华北理工大学机械工程学院,河北唐山063009 [3]吉林大学机械科学与工程学院,吉林长春130025

出　　处：《华中科技大学学报（自然科学版）》2017年第3期99-104,共6页Journal of Huazhong University of Science and Technology(Natural Science Edition)

基　　金：湖北省技术创新专项基金资助项目(2016AAA045);国家科技支撑计划资助项目(2013BAF07B04)

摘　　要：为了提升散热器综合性能,保持车辆工作性能稳定,根据生产商提供的几何参数,应用计算流体力学对管片式散热器单元性能进行数值计算,将结果与试验数据对比,以验证仿真模型的准确性.以尽量保持散热面积为前提,提出以NACA0018翼型作为热管特征,计算并对比两者的JF因子,进一步讨论其与NACA0012,NACA0021间的换热系数和压力损失差异.仿真结果表明:通过对散热器单元体的数值模拟,可在一定误差范围内获取散热器冷侧换热系数和压力损失;与扁平管翅片结构相比,仿真区间内翼型热管翅片的JF因子略高,当流速达到12m/s时,JF评价因子高出约15.97%;与NACA0018相比,NACA0021具有较高的换热系数和压力损失,设计时应根据相对厚度酌情选择.In order to improve the comprehensive performance of the radiator and keep vehicle working stably,based on files offered by the manufacturer,an elementary unit was numerically investigated with computational fluid dynamics method,and the results were compared with experimental data for the accuracy validation.The airfoil NACA0018 with the similar area was adopted as the tube shape.Its JF factor was acquired from the corresponding numerical investigation and compared with the original.The deviation on the heat transfer coefficient and pressure loss between the airfoil NACA0012,NACA0018 and NACA0021were discussed.The results show that the air-side heat transfer coefficient and pressure loss of the radiator can be obtained within a specific error range by the numerical investigation on an elementary unit.The JF factor of the fin elementary unit of the radiator having the wing-shaped tube presets higher than that for the one having the flat tube as the inlet air velocity varies from 2m/s to 12m/s,when the air velocity reaches 12m/s,it increases by 15.97%.Compared with NACA0018,NACA0021 owns the higher heat transfer coefficient and pressure loss,which leads to an appropriate selection in the design based on the thickness.

关 键 词：工程车辆 冷却系统 翼型热管 散热器 计算流体动力学 JF因子 

分 类 号：TH243[机械工程—机械制造及自动化] U464.138[机械工程—车辆工程]