为了研究汽车发动机舱热管理，设计出与整车开发流程相匹配的发动机舱热管理工作的模拟分析流程。基于“计算流体力学”CFD软件中的STAR-CCM+，分析了某车型发动机舱的冷流场，提出其前端进气格栅的优化方案。该优化方案使流经散热器与冷凝器的风量分别提升7.0%和9.6%。获得了优化的发动机舱的温度分布云图及热平衡温度。针对风险部件进行舱内热害仿真分析，得到目标监测点温度满足许用温度要求。水温试验模拟仿真分析中的整车热平衡，仿真精度≥85%，舱内热害仿真精度≥95%。结果表明：应用该流程具有较高的计算效率和可靠性。%A simulation analysis process of nacel e thermal management was designed to investigate the thermal management in cabin of a developing automobile considering lfow match. An optimization scheme of the front air intake gril e was made by the nacel e cold lfow ifeld analysis to a model automobile based on the STAR-CCM+of the CFD (Computational Fluid Dynamics) software. The optimal scheme increased air volume by 7.0%for radiator and by 9.6%for condenser. The thermal equilibrium temperatures and the temperature distributions in the cloud for the optimal scheme were obtained to analyze the thermal pol ution in an automobile cabin. The target temperature for risk parts was obtained by cabin thermal damage simulation to monitor the satisfy requirement of al owable temperature. The thermal equilibrium simulation results for an automobile were veriifed by water experiments with an accuracy of 85%or higher. The cabin thermal damage has an accuracy of 95%or more. Therefore, the design process has a high computing efifciency and a high reliability.
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