对旋风机叶轮内部流场的压力脉动分析  

Analysis on Pressure Fluctuation of the Interior Flow Field in Impellers of a Contra-rotating Axial Fan

作　　者：陈庆光[1] 房菲[1] 张振东[1] 贾祥省[1] 

机构地区：[1]山东科技大学机械电子工程学院,山东青岛266510

出　　处：《山东科技大学学报（自然科学版）》2011年第2期80-85,共6页Journal of Shandong University of Science and Technology(Natural Science)

基　　金：教育部科学研究重点项目(209070);山东省教育厅科技计划项目(J08LB03)

摘　　要：采用大涡模拟(LES)方法对一台对旋式轴流风机进行了三维全流场内非定常流动的数值模拟,在前后级叶轮流场的关键位置布置了若干监测点,在几个旋转周期内采集了各监测点处的压力数据,通过快速傅里叶变换方法将采集到的压力数据进行处理,得到各监测点的压力脉动频域图,通过频域图分析了监测点处压力脉动的频率、强度及形成原因。研究结果可为对旋风机气动噪声分析和风机的优化设计提供参考。The numerical simulation of unsteady flow in 3-D full flow field of a contra-rotating axial fan was made by means of the large eddy simulation（LES） technique.Many monitoring points were arranged at the key position in the flow field of both front and back impellers.The pressure data at the monitoring points in several rotating periods were collected and,then,processed by using fast Fourier transform（FFT） algorithm,obtaining the diagrams of frequency domain at all monitoring points.The frequency,strength and genesis of pressure fluctuation at all monitoring points were analyzed through the frequency domain diagrams.This study could be useful in analysis of aerodynamic noise and the optimal design of contra-rotating axial fan.

关 键 词：快速傅里叶变换 大涡模拟 压力脉动 三维流场 对旋式轴流风机 

分 类 号：TH432.1[机械工程—机械制造及自动化]