基于低噪声的发动机冷却风扇的参数优化设计

摘要

本文对发动机冷却风扇的噪声产生机理进行了分析,介绍了风扇噪声影响因素及降噪策略.针对某型号为SVW7183的发动机冷却风扇,从影响风扇噪声性能诸因素中选取两种因素一叶片数、叶型安装角进行分析研究,总结出这两种因素对风扇噪声性能影响的规律性.根据上述研究结果并结合所研究风扇的实际工况,对原风扇结构与尺寸参数进行了优化设计.实验分析表明,优化后的风扇较原风扇性能有了显著提高.%This paper analyzes the mechanism of production of the noise of the engine cooling fan, and illustrates influencing factors and noise reduction strategy. For one type of engine cooling fan SVW7183, ihe thesis chooses two factors such as number of blade and installing angle of blade profile and studies, sums up the law that two factors influence fan noise performance- According to the above research results, and combining with the actual working condition, the structure and size parameters of original fan are designed optimally. Experimental results showed that the performance of optimal fan had improved.