摘要
基于水力损失法对具有代表性的三个汽车水泵模型进行数值模拟,将数值计算结果与实验值对比后发现数据吻合较好,说明模拟流场基本符合真实流场,故其计算结果可用于水泵性能分析。然后在数值计算基础上分别求出三个水泵各部件的水力损失,对损失模型中的损失系数进行回归分析,得到损失系数与雷诺数、比转数之间的数学关系,并对各部件的曲线形式进行归纳总结。同时针对不同水泵的同一部件进行流场分析,提出了减小汽车水泵各部件水力损失的合理性建议,并结合机械损失与容积损失建立了汽车水泵的性能预测模型。
Basing on hydraulic loss method, numerical simulation of three representative automotive water pumps has been made. There is a litter difference between numerical results and experimental values which proves the numerical flow field is close to the real flow field. Therefore, the numerical results can be used to analyze the performance of pumps. Then on the basis of numerical simulation, the mathematical relationship between loss coef- ficient and specific speed with Reynolds number was proposed by calculating the hydraulic loss of various parts of three pumps and regression analyzing the loss coefficient of loss model, while the curves of various parts were sum- marized. Meanwhile, the reasonable proposals to reduce hydraulic loss of the automobile water pump were put for- ward through analyzing the flow field of the same parts in different loss, an automotive water pump performance prediction model was pumps. Combining mechanical loss with volume finally established.
出处
《科学技术与工程》
北大核心
2013年第11期2958-2964,共7页
Science Technology and Engineering
关键词
汽车水泵
数值模拟
水力损失
性能预测
automotive water pump numerical simulation hydraulic loss performance prediction
