汽车侧窗雨水污染的数值仿真分析  

Numerical simulation analysis of rainwater contamination on vehicle side windows

作　　者：赵鹏 高静 ZHAO Peng;GAO Jing(NIO lnc.,Shanghai 201800,China)

机构地区：[1]上海蔚来汽车有限公司,上海201800

出　　处：《空气动力学学报》2024年第7期86-102,I0002,共18页Acta Aerodynamica Sinica

摘　　要：为了提升雨天行车安全,减少侧窗雨水污染,改善驾驶员视野是汽车设计的关键环节。本文采用液膜模型和拉格朗日模型,并引入VOF模型,模拟了某款SUV侧窗的积水现象,实现了对雨水流动、积聚和刮刷过程的精准描述。通过定义多种水相和空气相的相互作用方式,并调整经验系数,有效提升了仿真的稳定性和精度。此外,本文开发了一种新型雨刷运动模拟方法,克服了传统方法的不稳定性,并显著提高了计算效率。利用该方法对不同造型方案和车速下的侧窗雨水污染进行数值仿真,结果与试验结果一致,验证了方法的可靠性和有效性。To enhance driving safety in rainy conditions and reduce the contamination of side windows by rainwater,improving the driver's visibility is a crucial aspect of vehicle design.This paper utilizes a liquid film model and a Lagrangian model,and introduces a Volume of Fluid(VOF)model,successfully simulating the water accumulation phenomenon on the side windows of a certain SUV,achieving an accurate depiction of the rainwater flow,accumulation,and wiping process.By defining various interaction modes between the water phase and air phase,and adjusting empirical coefficients,the stability and accuracy of the simulation have been effectively enhanced.In addition,this paper has developed a novel method for simulating the motion of wiper blades,overcoming the instability of traditional methods and significantly improving computational efficiency.Using this method for numerical simulation of side window rainwater contamination under different styling schemes and vehicle speeds,the results are highly consistent with experimental outcomes,verifying the reliability and effectiveness of the method.

关 键 词：CFD仿真 A柱溢流 VOF 拉格朗日 液膜 雨刷运动 

分 类 号：U461.1[机械工程—车辆工程]