摩托车底盘试验风机风速均匀性优化设计研究

Research on the Optimization Design of the Wind Speed Uniformity of Motorcycle Chassis Test Fan

摩托车底盘检测对冷却风机风速均匀性有着严格要求,现有传统风机均存在风场特性不理想的突出问题。采用模型试验和数值模拟相结合的方法,对试验风机的出口风速进行了深入分析,在几何优化拓扑的基础上得到了风机出口段的最佳优化方案。结果表明:增加出风管道长度、减小进风口尺寸可以改善风速均匀性,而采用平均等分格栅形式对出风口进行改造并不能显著改善出风口的风场特性,通过几何拓扑优化得到的风机出口优化方案可以显著提升风机出口风速分布均匀性,满足机动车测试的要求。

Motorcycle chassis inspection has strict requirements for the uniformity of wind speed of cooling fans.The existing traditional fans have outstanding problems of unsatisfactory wind field characteristics.By combining model test and numerical simulation,the outlet wind speed of the test fan is analyzed in depth,and the optimal scheme of the outlet section of the fan is obtained on the basis of geometric optimization topology.The result table shows that increasing the length of the air outlet duct and reducing the size of the air inlet can improve the uniformity of the wind speed.The modification of the air outlet in the form of the average grid can not significantly improve the wind field characteristics of the air outlet.The fan outlet optimization scheme obtained through the geometric topology optimization can significantly improve the uniformity of the wind speed distribution at the fan outlet and meet the requirements of motor vehicle testing.