基于双向流固耦合的发动机冷却风扇性能对比分析  

Comparative Analysis of Engine Cooling Fan Performance Based on Tow Fluid Structure Coupling

作　　者：王亚男 万里翔[1] 王新玲 

机构地区：[1]西南交通大学,四川 成都 [2]宁波雪龙集团有限公司,浙江 宁波

出　　处：《建模与仿真》2020年第2期152-162,共11页Modeling and Simulation

摘　　要：针对发动机冷却风扇结构变形影响其气动性能问题,通过ANSYS workbench分别采用双向流固耦合法与多重参考系法(MRF)对一款发动机冷却风扇在不同流量下进行仿真计算分析。得到风扇气动性能对比曲线以及不同流量下的叶片压力分布与叶片变形量,分析叶片变形对仿真结果的影响。结果表明:考虑耦合作用后的叶片压力分布更均匀;转速一定的条件下风扇的变形量随着流量的增大先减小后增大,最大变形位置位于叶片前缘叶尖处;双向流固耦合法计算的仿真值与试验值更吻合,验证了流固耦合方法在风扇性能计算中的优越性。Aiming at the problem that the structural deformation of the engine cooling fan affects its aero-dynamic performance, the simulation calculation and analysis of an engine cooling fan under dif-ferent flow rates are carried out by using two-way fluid solid coupling method and multiple ref-erence system method (MRF) respectively in ANSYS Workbench. The comparison curve of the aerodynamic performance of the fan and the pressure distribution and deformation of the blade under different flow rates are obtained, and the influence of the deformation of the blade on the simulation results is analyzed. The results show that the pressure distribution of the blade is more uniform after considering the coupling effect;the deformation of the fan decreases first and then increases with the increase of the flow rate at a certain speed, and the maximum deformation po-sition is located at the tip of the leading edge of the blade;the simulation value calculated by the two-way FSC method is more consistent with the test value, which verifies the superiority of FSC method in the calculation of fan performance.

关 键 词：发动机冷却风扇 有限元仿真 流固耦合 叶片变形 

分 类 号：TP3[自动化与计算机技术—计算机科学与技术]