基于流固耦合的汽车空调多翼离心通风机气动声学特性分析  

Analysis on Aerodynamic Noise Characteristics of Multi-blade Centrifugal Fan in a Vehicle Air Conditioner Based on Fluid-structure Coupling

作　　者：谢超[1] 谷正气[1,2] 杨振东[1] 杨晓涛[1] 宗轶琦[1] 罗泽敏[1] 

机构地区：[1]湖南大学汽车车身先进设计制造国家重点实验室,长沙410082 [2]湖南工业大学,株洲412007

出　　处：《中国机械工程》2014年第19期2658-2664,共7页China Mechanical Engineering

基　　金：国家自然科学基金资助项目(50975083);湖南省科技攻关计划重点项目(2009JT1014);长江学者与创新团队发展计划资助项目(531105050037);湖南大学汽车车身先进设计制造国家重点实验室自主课题(61075001)

摘　　要：建立了一个简单几何模型,通过试验验证得出双向流固耦合计算比非耦合计算准确性更高的结论。以某汽车空调系统的多翼离心通风机为研究对象,分析了蜗壳流固耦合作用对通风机气动噪声的影响。利用CFX和ANSYS软件分别进行流场和结构计算。以MFX-ANSYS/CFX为数据耦合平台,采用双向同步求解的方法,对通风机内流场和蜗壳结构响应进行联合求解,并将耦合计算结果与非耦合计算结果进行对比。结果表明,流固耦合作用使得流场压力脉动增强;在考虑流固耦合作用影响后,离心通风机叶轮出口处及蜗壳气道内表面的声功率级明显增大,通风机出口处的气动噪声值增大了5.24dB。Created a simple geometric model,two-way fluid-structure interaction calculation was more accurate though experimental verification.Then,multi-blade centrifugal fan of a vehicle air conditioning system was taken as an research object,effects of the volute FSI on the fan aerodynamic noise were analyzed.Flow field calculation was carried out using CFX software and structure calculation was carried out using ANSYS software,respectively.Based on MFX-ANSYS/CFX data coupling platform,two-way synchronization solution method was used to solve the ventilator airflow field and the response of volute structure.The results show that,FSI effects enhance the flow field pressure pulsation;after considering FSI effects,the sound power level of the centrifugal fan impeller outlet and volute airway surface increases significantly,and the noise value of the fan outlet increases 5.24 dB.

关 键 词：离心通风机 流固耦合 气动噪声 数值计算 

分 类 号：U270.2[机械工程—车辆工程]