装载机冷却风扇导流罩空气动力噪声分析及降噪方案  

Aerodynamic Noise Analysis and Noise Reduction Scheme for Flow Guiding Cover of Cooling Fan on a Loader

作　　者：焦国旺[1] 张建润[1] 蔺宏伟[1] 周幸福[1] 

机构地区：[1]东南大学机械工程学院

出　　处：《工程机械》2010年第3期46-49,共4页Construction Machinery and Equipment

摘　　要：合理设计装载机冷却风扇导流罩的形状,可以减少流场紊流,降低噪声。对装载机常见冷却风扇导流罩进行了三维实体建模,并对导流罩内的流场进行仿真分析和计算。在仿真和计算的基础上,提出了两种导流罩改进方案。根据理论计算,改进设计后的导流罩能够有效地降低空气动力噪声辐射。Rational design of flow guiding cover shape on a loader can avoid turbulent of flow field so the noise can be reduced. 3D solid model is set up for a common flow guiding cover of cooling fan and simulation analysis and calculation are carried out for the flow field inside the guiding cover. On the basis of simulation and calculation, two improvement schemes for the cover are suggested. According to theoretical calculation, the guiding cover after improved designing can effectively reduce aerodynamic noise radiation.

关 键 词：冷却风扇 导流罩 空气动力噪声 声辐射 仿真 

分 类 号：TH243[机械工程—机械制造及自动化] TB535[理学—物理]