| 汽车前照灯水汽凝聚现象的瞬态CFD预测 |
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| 作者姓名： | 闫相文 李景 高岳 王利利 |
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| 作者单位： | 中汽研(天津)汽车工程研究院有限公司,天津 300300 |
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| 摘 要： | 汽车前照灯光品质是衡量汽车照明系统安全性的一项重要指标.通过商用计算流体力学(Computational Fluid Dynamics,CFD)软件Star-CCM+对汽车前照灯内部的流动情况、热力学特性以及起雾/除雾过程进行了模拟.研究表明,雾层厚度与分布主要与湿度、流动条件以及换热条件相关.探索了完整的大灯起雾仿真...
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| 关 键 词： | 计算流体力学 除雾 前照灯 冷凝 照明质量 |
Transient CFD Simulation for Condensation Prediction of Vehicle Headlamps |
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| Authors: | YAN Xiangwen LI Jing GAO Yue WANG Lili |
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| Institution: | (CATARC(Tianjin)The Automotive Engineering Research Institute Co.,Ltd.,Tianjin 300300,China) |
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| Abstract: | The optical quality of vehicle headlamps is a significant indicator of safety performance of the automobile lighting system. The condensation processon the inside surface of headlamp lens was simulated by using the commercial CFD code Star-CCM+.The flow field and the fogging and defogging process had been simulated numerically. It is found that the fog thickness is related to ambient humidity, the flow conditions and heat transfer conditions. Acomplete simulation procedure and CFD physical model were investigated.The aerodynamic boundary conditionsand a phase-change model were introduced to represent the fogging and defogging processes on the lens. Finally a prototype model of headlamp was simulated and the fogging
phenomenon was analyzed. Based on the results obtained, suggestions to improve the headlamp defogging ability were provided. |
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| Keywords: | computational fluid dynamics defogging headlamp condensation light quality |
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