低噪声发动机冷却风扇结构改进设计  

Structure Improvement Design of Engine Cooling Fans with Low Noise

作　　者：黄继刚[1] 李琳[1] 李娜[2] HUANG Ji-gang;LI Lin;LI Na(Nanhang Jincheng College,Nanjing University of Aeronautics and Astronautics,Jiangsu Nanjing 211156,China;School of Automotive and Traffic Engineering,Jiangsu University,Jiangsu Zhenjiang 212013,China)

机构地区：[1]南京航空航天大学金城学院,江苏南京211156 [2]江苏大学汽车学院,江苏镇江212013

出　　处：《机械设计与制造》2018年第9期205-208,共4页Machinery Design & Manufacture

基　　金：国家自然科学基金(51475062)

摘　　要：为在不牺牲气动性能的前提下降低发动机冷却风扇的气动噪声,提出了一种新型的冷却风扇结构改进方案,即在风扇叶片吸力面上增加若干沿径向规律分布的楔形结构.以风量及进风口处噪声值为评价指标,设计正交试验,借助CFD/CAA耦合仿真法对各风扇流场及声场进行数值模拟,探究楔形结构参数对冷却风扇性能的影响.根据正交试验结果选择出一组楔形结构优化方案,将其与原始方案仿真结果进行对比,风量略增加,噪声值降低了8.8%,有一定工程应用价值。A new structure was introduced for engine cooling fan to reduce its acoustic noise on the premise of satisfaction of aerodynamic performance.The way was adding several wedge-shaped structures on suction surfaces of blades of the cooling fan.A series of orthogonal tests were arranged with volume flow and noise value at the inlet as the evaluating indicators to analyze the influence of the wedge structures’parameters which were calculated with CFD/CAA distributed coupling method.Finally,an optimized cooling fan with wedge structures was obtained,and its noise value reduced by 8.8%while volume flow increased a little compared to the original one,which has application value of certain projects.

关 键 词：风扇 气动噪声 楔形 正交试验 数值模拟 

分 类 号：TH16[机械工程—机械制造及自动化] U462.1[机械工程—车辆工程]