林静祥;秦国良;艾子健;和文强;
LIN Jing-xiang;QIN Guo-liang;AI Zi-jian;HE Wen-qiang;Xi'an Jiaotong University;

• 1:西安交通大学

摘要(Abstract)：

针对某离心通风机模型,研究了防涡圈对风机性能的影响。数值模拟和试验结果都说明了加装防涡圈后全压升和效率有所下降,这与以往的认知不完全一致。设计工况下,未加装防涡圈的通风机全压升比加装长防涡圈的风机高出约4%,效率高出约3%,内泄漏情况也会随防涡圈长度的增加变得严重;从内部流场可以看出,加装防涡圈减小了蜗壳内部的扩压空间,叶轮出口大尺度漩涡更加剧烈,影响了叶轮出口气流方向,并在叶轮出口产生回流现象,降低了通风机的全压和效率。因此认为对于不同压力系数和流量系数的风机,防涡圈对风机性能的影响规律是不一样的。
Affection of anti-vortex ring on the performance of a centrifugal fan model has been studied. The results of numerical simulation and experiment explains that total pressure and efficiency decrease after the anti-vortex ring installed,which is not entirely consistent with previous knowledge. According to the results of numerical simulation and experiment,the total pressure and efficiency of centrifugal fan with no anti-vortex ring are about 4% and 3% higher than the centrifugal fan with long anti-vortex ring,internal leakage also becomes worsen with the increasing length of anti-vortex ring. According to the internal flow field analyzing,the space in volute becomes small because the installation of anti-vortex ring,large vortex at the impeller outlet becomes more intense,which affects air flow direction at the impeller outlet,backflow phenomenon take place at the impeller outlet,total pressure and efficiency of the centrifugal fan model will decrease. As a result,it can be concern that the anti-vortex ring causes different impaction on centrifugal fan of different pressure coefficient and flow coefficient.

关键词(KeyWords)： 离心通风机;防涡圈;大尺度漩涡;内泄漏
centrifugal fan;anti-vortex ring;large vortex;internal leakage

Abstract:

Keywords:

基金项目(Foundation):

作者(Authors): 林静祥;秦国良;艾子健;和文强;
LIN Jing-xiang;QIN Guo-liang;AI Zi-jian;HE Wen-qiang;Xi'an Jiaotong University;

参考文献(References)：

• [1]郭志新,祁大同,王尚锦.具有单板密封型挡风环的离心风机[P].中国:CN2044655,1987-09-20.
• [2]祁大同,郑志新,李西杰.节能型4-69No.5A离心通风机的设计计算和实验研究[J].流体工程,1989,(1):7-11.
• [3]李春曦,雷泳,王松岭,等.加装防涡圈的离心风机蜗壳内空气动力学特征和降噪研究[J].中国电机工程学报,2006,26(17):117-121.
• [4]张磊,王松岭,吴正人,等.离心风机蜗壳内加装旋涡破碎装置的实验研究[J].中国电机工程学报,2009,11:87-91.
• [5]孙泳锋,赵军,高杰,等.不同前盘结构形式多翼离心风机性能对比研究[J].流体机械,2014,42(1):30-35.
• [6]王海桥,贾腾,陈世强,等.变频矿用主通风机性能试验及非等比变化律研究[J].流体机械,2015,43(1):7-12.
• [7]陈宇砾,王国珍,轩福贞,等.核电管道LBB裂纹张开面积和泄漏率计算程序开发[J].压力容器,2014,31(6):28-33.
• [8]李美川,赵美宁,王芳,等.一种可编程多层装箱机的研发[J].包装与食品机械,2014,32(5):35-39.
• [9]李晓丽,楚武利,谢芳.防涡圈对离心风机性能的影响[J].机械科学与技术,2011,(7):1183-1186.