对旋式通风机压力脉动特性的数值研究  

Numerical study on pressure fluctuation in counter-rotating axial fan

作　　者：陈庆光[1] 王维斌[2] 张永超[1] 张永建[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 [2]山东青岛海尔集团EPG-PD中心,山东青岛266101

出　　处：《空气动力学学报》2011年第2期182-188,共7页Acta Aerodynamica Sinica

基　　金：教育部科学技术研究重点项目:轴流式通风机压力脉动及气动噪声分布特性研究(209070)

摘　　要：对矿用对旋式通风机内部的三维非定常湍流流动进行了数值模拟,采用FFT方法得到了包括通风机进口、集流器、前级电机、两级叶轮、后级电机、扩散器和通风机出口等在内的共10个监测面上监测点处压力脉动的时域和频域分布。分析结果表明:对旋式通风机两级叶轮及其附近区域是流场中压力脉动较强的区域;前后两级叶轮之间的动-动干涉、两级叶轮与其相邻部件之间的动-静干涉以及流动的周期非定常特性是通风机内部压力脉动产生的主要根源;设计良好的集流器和扩散器可以显著降低通风机进出口处的压力脉动。研究结果可为通风机的噪声预估和控制提供参考。Numerical simulation of 3-D unsteady turbulent flow in a counter-rotating axial fan has been performed in this paper.The distribution of pressure fluctuation,respectively,in the time domain and the frequency domain at the characteristic points on ten monitor surfaces,which include the inlet,the collector,the first electrical motor,two-stages of impellers,the second electrical motor,the diffuser and the outlet,is obtained by using the FFT method.The analytical results show that strong pressure fluctuation exists in the two-stages of impellers and their adjacent regions.The rotor-rotor interaction between the two counter-rotating impellers,the rotor-stator interaction between the two impellers and their adjacent stationary parts as well as the periodical unsteady characteristic of the flow are the main causes that result in the pressure fluctuation inside the fan.Well-designed collector and diffuser can remarkably reduce the pressure fluctuation in the inlet and outlet of the fan.The simulation results may offer help to the noise prediction and control of the fan.

关 键 词：对旋式通风机 非定常湍流 压力脉动 数值研究 

分 类 号：TH432.1[机械工程—机械制造及自动化]