基于某车型在低温怠速试验中节温器不能正常打开问题进行研究,提出相应的优化方案,首先依据冷却系统原理图进行冷却系统一维分析,获取流量边界数据,然后对水泵节温器总成建模,进行CFD分析,得到不同工况下的流速及汽蚀数据,最后通过试验验证优化方案的有效性。 Based on the research on the problem that a thermostat can not be opened normally in a low-temperature idle speed test, a corresponding optimization scheme is proposed. First, a one-dimensional analysis of the cooling system is performed according to the cooling system principle diagram to obtain the flow boundary data, and then the water pump thermostat assembly Modeling, CFD analysis, get the flow rate and cavitation data under different conditions, and finally verify the effectiveness of the optimization program through experiments.