环境风洞阻塞比对冷却模块空气侧流场的影响  

Effect of Climate Wind Tunnel Blockage on Air-side Flowfield of Cooling Module

作　　者：王宏朝[1] 单希壮[1] 杨志刚[1] WANG Hengchao SHAN Xizhuang YANG Zhigang(Shanghai Automotive Wind Tunnel Center, Tongji University Shanghai 201804, China)

机构地区：[1]同济大学上海地面交通工具风洞中心,上海201804

出　　处：《同济大学学报（自然科学版）》2017年第9期1372-1376,共5页Journal of Tongji University:Natural Science

基　　金：国家国际技术合作专项项目(2014DFA10610);上海地面交通工具风洞专业技术服务平台项目(16DZ2290400)

摘　　要：为研究不同环境风洞阻塞比对冷却系统试验的影响,通过数值模拟,建立1:1环境风洞模型及整车模型,分析不同阻塞比下冷却模块空气侧流场及前端的速度轮廓.结果表明:随着阻塞比增高,散热器表面风速分布发生变化,而其速度均匀性变化不大,当阻塞比大于0.486时,通过散热器的冷却空气流量有明显下降,降幅达5%;车辆前端的速度轮廓由于阻塞效应的存在发生偏移,且不同区域的偏移量并不一致.因此,对于环境风洞需要根据不同的试验目标进行阻塞比修正.Based on a numerical simulation, a 1：1 scaled model of the climate wind tunnel and that of the passenger car were created to investigate the effect of climate wind tunnel blockage on the cooling system experiment and analyze the air-side flowfield of cooling module and the frontal velocity profile. The results indicate that, along with the increase of blockage ratio, the velocity distribution on the windward surface of radiator will make a difference, but little change for the uniformity index of velocity distribution. As the blockage surpasses 0. 486, the air mass flow through the radiator has an obvious decrease, even up to 5 %. Due to the blockage effect, the frontal velocity profile exists an offset, which is inconsistent in different positions. Consequently, the climate wind tunnel needs to perform a blockage correction according to the different experimental targets.

关 键 词：环境风洞 阻塞比 冷却模块 空气侧流场 数值计算 

分 类 号：U467.13[机械工程—车辆工程]