基于 SPH 方法的空调进气口进水量分析及优化

由于雨刮臂摆动频次与导水槽及空调外循环进风口结构不匹配等因素，部分车型在淋雨工况下，有水滴甚至水流沿空调进风口进入空调系统，导致空调出现异味，甚至有水渗漏进入乘客舱，出现严重的感知质量问题。采用 SPH 方法，考虑雨刮臂运动、车身姿态及气流效应工况下，借助 PreonLab 软件仿真，复现某车型淋雨场景下的水管理质量问题，通过在空调外循环进风口位置增加挡板，显著减少了溅入空调箱的雨水量，并在实车淋雨试验中得到验证。方法能在车辆开发阶段发现并整改车辆在淋雨场景下的流通路径设计不合理等问题，可改变目前车辆淋雨场景水管理质量控制主要依托实车测试的现状，也可应用于车辆水管理的其他性能质量的控制，如涉水、雨污等。

Analysis and Optimization of Air Inlet Water Quantity Using the SPH Method

Due to factors that the wiper swing frequency does not match the structure of the water-guiding channel and the air conditioning (AC) external circulation inlet, some vehicle models under rainy conditions experience water droplets or even water flow entering the AC system through the inlet, leading to the unpleasant odors from the air conditioning, and even water leakage into the passenger compartment, causing serious perceived quality issues. By employing the SPH method considering wiper movement, body posture,and the effects of airflow conditions, the paper uses PreonLab software to simulate a vehicle in rainy scenarios to address the water management issues. By adding a baffle at the position of the AC external circulation inlet, the entry of the rainwater into the AC system is significantly reduced, and this solution is verified through the real vehicle tests under rainy conditions. The proposed method can find and rectify the unreasonable flow path designs for vehicles in the rainy scenarios during the development stage without relying on real vehicle tests. The method can also be applied to other performance quality control of vehicle water management, such as wading and rain pollution.