| 摘要: |
| 本文以电动汽车前端冷却模块为研究对象，建立了倾斜角度为0°、15°、30°、45°、60°的低温散热器模型，对其性能进行了数值模拟，并通过实验进行了验证，结果表明：相同流速下，倾斜角度越大，低温散热器的换热性能越好，阻力越大，综合性能越差。通过固定进气格栅位置，建立了不同倾斜角度的带有导流罩壳的低温散热器模型进行了模拟和分析，随着倾斜角度的增大，罩壳阻力降低，低温散热器的风量分布均匀性和换热性能提高，但阻力增大，综合性能变差。通过优化罩壳结构，提高了风量均匀性，降低了罩壳和低温散热器的阻力，改善了换热性能，倾斜角度越大，冷却模块综合性能越好，综合考虑前舱布置得到倾斜角度在45°~60°区间更具应用性。 |
| 关键词: 冷却模块 罩壳 倾斜角度 性能 强化传热系数 风量分布 |
| DOI： |
| Received:September 15, 2022Revised:December 06, 2022 |
| 基金项目:上海市浦东新区科技发展基金专项（PKX2019-R15）资助。 |
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| Study of Inclination Angles on EV Front-end Cooling Module |
|
Liu Jiarui1, Li Ke2, You Weina1, Yu Jile1
|
| (1.ESTRA Automotive Air-Conditioning Systems (Shanghai) Co., Ltd.;2.The Pan Asia Technical Automotive Center Co., Ltd.) |
| Abstract: |
| On the front-end cooling module of electric vehicles (EVs), geometric models of the low-temperature radiator (LTR) with inclination angles of 0°, 15°, 30°, 45°, and 60° were established and numerically simulated. At the same flow rate, the larger the inclination angle, the better the heat transfer of the LTR, the higher the resistance, and the lower the comprehensive performance, as verified by the test results. By fixing the position of the air-inlet grille, geometric models of the LTR with a shroud at different inclination angles were established for simulation. With an increase in the inclination angle, the shroud resistance decreased; the airflow distribution uniformity and heat transfer performance of the LTR were improved; the resistance increased, and the comprehensive performance decreased. By optimizing the shroud structure, the flow distribution was improved; the flow resistances of the shroud and LTR were reduced, which led to improved heat exchange. It was concluded that the larger the inclination angle, the better the comprehensive performance of the cooling module. Comprehensively considering the arrangement of the front compartment, an inclination angle between 45° and 60° was more applicable. |
| Key words: cooling module shroud inclination angle performance enhanced heat transfer airflow distribution |
