基于CFD的某商用车冷却性能提升研究  

Research on Cooling Performance Improvement of a Commercial Vehicle Based on CFD

作　　者：赖凡 冯哲 唐荣江[2] 唐经添 王青青 LAI Fan;FENG Zhe;TANG Rong-jiang;TANG Jing-tian;WANG Qing-qing(Dongfeng Liuzhou Automobile Co.,Ltd.,Liuzhou Guangxi 545000,China;Guilin University Of Electronic Technology,Guilin Guangxi 541000,China)

机构地区：[1]东风柳州汽车有限公司,广西柳州545000 [2]桂林电子科技大学,广西桂林541000

出　　处：《装备制造技术》2021年第3期148-152,159,共6页Equipment Manufacturing Technology

摘　　要：针对某型商用车冷却性能提升问题,运用数值模拟仿真方法对发动机舱内的流场和温度场进行分析研究。根据流场与温度场的仿真结果,确定机舱中热回流的位置以及形成发动机舱内的高温热害的原因,结合整个发动机舱布局,提出了加厚水箱、优化机舱流道以及在车架内和散热器左前方加挡风板的改进方案,并加以匹配分析得到最优组合方案。仿真结果表明:加厚水箱、发动机后移以及在车架内加挡板的组合方案有效减轻热回流现象,其散热器冷却常数K值较原机降低10.4℃,有效改善发动机舱散热环境。In order to improve the cooling performance of a commercial vehicle,the numerical simulation method is used to analyze the flow field and temperature field in the engine compartment. According to the simulation results of the flow field and temperature field, the location of the heat return in the engine room and the cause of the high temperature heat damage in the engine room are determined, combined with the layout of the entire engine room,a thicker water tank,optimized air flow channel and in the frame are proposed. And the improved scheme of adding a windshield to the left front of the engine room, and matching analysis to obtain the optimal combination scheme.The simulation results show that the combination of thickening the water tank,shifting the engine back and adding baffles in the frame effectively reduces the heat recirculation phenomenon,and the radiator cooling constant K value is reduced by 10.4℃ compared with the original machine,which effectively improves the heat dissipation of the engine compartment surroundings.

关 键 词：CFD 发动机舱 流场 温度场 散热 

分 类 号：U464[机械工程—车辆工程]