商用车冷却系统风扇噪声控制与散热优化  

Fan Noise Control and Heat Dissipation Optimization of Commercial Vehicle Cooling System

作　　者：唐荣江[1,2] 张淼 胡宾飞 陆增俊 肖飞 Tang Rongjiang;Zhang Miao;Hu Binfei;Lu Zengjun;Xiao Fei(Guilin University of Electronic Technology,Guilin 541004;Commercial Vehicle R&D Center,Dongfeng Liuzhou Automobile Co.,Ltd.,Liuzhou 545005)

机构地区：[1]桂林电子科技大学,桂林541004 [2]东风柳州汽车有限公司商用车技术中心,柳州545005

出　　处：《汽车技术》2020年第2期53-58,共6页Automobile Technology

基　　金：广西制造系统与先进制造技术重点实验室项目(17-259-05-010Z);柳州市科学研究与计划开发项目(2018AA20301);广西自然科学基金项目(2015GXNSFBA139232)

摘　　要：针对某型商用车冷却系统风扇噪声与散热匹配问题,提出了通过改变风扇结构降低噪声和增加挡风板阻挡热风回流的改进方案。通过改变叶片数量、轮毂比、叶片弯曲角度等风扇性能参数,以及对冷却风扇的质量流率和气动噪声进行计算流体动力学(CFD)仿真,对风扇各性能参数进行了优选;对发动机舱流场和温度场进行分析,发现散热器存在热风回流问题,通过在散热器上部和左、右两侧增加挡风板阻挡回流。试验结果表明,改进后风扇噪声降低了2.7dB(A),发动机舱内最高温度由417K下降至392 K。To address the problem of matching fan noise and heat dissipation in a commercial vehicle cooling system,we propose a plan to reduce noise by changing the fan structure and to increase the windshield to block the hot air reflux.By changing fan performance parameters,including the number of blades,wheel hub ratio and blade bending angle,and the cooling fan mass flow rate and aerodynamic noise are simulated by CFD,the fan performance parameters are optimized.Then,the flow field and temperature field of engine compartment are analyzed,which reveals that hot air reflux exists in the radiator,then baffle is added to the upper part of the radiator and to the left and right sides of the radiator to block the reflux.The results show that the fan noise is reduced by 2.7dB(A)and the maximum temperature in the engine cabin is reduced from 417K to 392K.

关 键 词：发动机舱 风扇噪声 计算流体动力学 散热 热风回流 

分 类 号：U464.238[机械工程—车辆工程]