Multi-objective Optimization of Commercial Vehicle Power Cabins Based on Flow Field Modulation

doi:10.3969/j.issn.1004-132X.2022.02.014

Abstract

Abstract: Aiming at the problems of dust， heat dissipation， and poor driving thermal comfort in the power cabins of commercial vehicles， a power cabin flow field modulate optimization method was proposed based on CFD numerical simulation and superposition optimization. The simulation analyses of the flow field in the power cabins of the original commercial vehicles revealed that reducing the airflow resistance and increasing the air intake may improve the performance of the power cabins. The performance modulation optimization of the flow field of the power cabins were realized by the superimpose optimization design of the radiator， cooling fan， and air guide hood. The results show that after optimization， the intake air volume is increased by 70.9%， the cooling K-value is reduced to 49.5 ℃， the intake air temperature increment and the number of dust particles are reduced by 19.8 ℃ and 94.0% respectively compared with the original commercial vehicles. The performance of the power cabins is significantly improved. The optimized commercial vehicle test results are in good agreement with the simulation ones.

Key words: power cabin flow field, heat dissipation, dust, thermal comfort, modulate optimization

摘要： 针对某商用车动力舱的扬尘、散热及驾乘热舒适性差等问题，提出了基于CFD数值仿真+叠加优化的动力舱流场调控优化方法。对原车动力舱内流场进行仿真分析，指出减小气流阻力、增大进风量是改善动力舱性能的基础。对散热器、冷却风扇以及护风罩进行叠加优化以实现对动力舱流场性能调控优化，结果表明：优化后进风量增大70.9%，进风温升比原车降低了19.8 ℃，冷却K值降低至49.5 ℃，扬尘颗粒数相对原车降低94.0%，动力舱性能有明显改善。优化后的商用车实车测试结果与仿真结果吻合较好。

关键词: 动力舱流场, 散热, 扬尘, 热舒适性, 调控优化

CLC Number:

U469.7

TANG Rongjiang, ZUO Yingxiang, LI Shenfang, LU Zengjun, XU Enyong, BI Daokun. Multi-objective Optimization of Commercial Vehicle Power Cabins Based on Flow Field Modulation[J]. China Mechanical Engineering, 2022, 33(02): 234-242.

唐荣江, 左迎香, 李申芳, 陆增俊, 许恩永, 毕道坤. 基于流场调控的商用车动力舱多目标优化[J]. 中国机械工程, 2022, 33(02): 234-242.

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