In view of that the arrangement of vehicle cooling assembly, consisting of condenser, radiator and cooling fan,has direct effects on the heat dissipation performance of vehicle,an optimization on the distance re-lationship among condenser,radiator and cooling fan of a vehicle is conducted with increasing air flow rate as objec-tive in this paper. Firstly two schemes,i.e. the moving forward of condenser alone and the moving forward of both condenser and radiator together,are compared by computational fluid dynamics simulation,indicating that the latter scheme can better increase the air flow rate of cooling assembly. Then orthogonal experiment method is adopted to optimize the distance relationship among condenser,radiator and cooling fan, with the best arrangement scheme of cooling assembly obtained. Finally the results of real vehicle test verification show that compared with original vehi-cle,the air flow rate of radiator with optimized arrangement scheme increases by 29.95% and 4.54% respectively for condition I and condition II,improving the heat dissipation performance of vehicle.%鉴于由冷凝器、散热器和冷却风扇组成的汽车散热组件的布置直接影响整车的散热性能,本文中以提升进风量为目标,对某车型的冷凝器、散热器和冷却风扇三者间的距离关系进行优化.首先采用计算流体力学仿真,比较了冷凝器单独前移和冷凝器与散热器一同前移两种方案,发现后一种方案能更好地提升散热组件的进风量.然后采用正交试验方法,对冷凝器、散热器和冷却风扇的间距进行优化,获得散热组件的最佳布置方案.最后实车试验验证结果表明,与原车相比,优化后工况I和工况II下的散热器进风量分别提高了29.95%和4.54%,改善了整车的散热性能.
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