出口轮毂形状对大型轴流风机性能影响的数值研究

尹超; 胡骏; 屠宝锋; 严伟; 张晨凯

出口轮毂形状对大型轴流风机性能影响的数值研究

南京航空航天大学能源与动力学院江苏省航空动力系统重点实验室, 南京 210016

基金项目:

高等学校博士学科点专项科研基金（20113218120006）

详细信息

作者简介:
尹超（1987- ），男，江苏扬州人，博士生，主要从事叶轮机械气动热力学研究.

中图分类号: V211.4
计量
- 文章访问数: 1201
- HTML浏览量: 4
- PDF量: 849
- 被引次数: 0
出版历程
- 收稿日期: 2013-03-14
- 刊出日期: 2014-05-28

Numerical investigation of effect of outlet hub geometry on performance of large scale axial fan

Jiangsu Province Key Laboratory of Aerospace Power System, College of Energy and Power Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China

摘要

摘要: 针对某大型轴流风机设计了4种出口段轮毂匹配方案，采用数值模拟方法对比分析了4种方案下的风机特性和叶尖以及叶根流场结构.结果表明：出口轮毂形状的变化对该风机叶尖流场结构影响很小；该风机出口无轮毂时，在叶根区域出现约占20%叶高区域的分离流，损失严重，降低了工作效率；在相同的叶尖间隙下，风机效率随着出口轮毂扩压角的减小而提高；在风机出口增加一个匹配的平直轮毂或收缩轮毂可使叶根分离涡后移，分离区域减小至5%叶高以下，同时可使该风机效率至少提高2个百分点.
- 大型轴流风机 /
- 全压效率 /
- 出口轮毂形状 /
- 结构匹配 /
- 叶根分离涡
Abstract: Four different outlet hub geometries of a large scale axial fan were designed and investigated. CFD methods were used to compare the fan characteristics and analyze the flow field structures in the blade tip and blade root. The results show that variation of outlet hub geometry has little effect on the fan's tip flow structure; there is a large separated flow in the blade root region which occupies 20% of blade height when the fan isn't provided with outlet hub, causing serious loss and decrease of efficiency; with the same blade tip clearance, the fan's efficiency increases when the outlet hub diffuser angle decreases; a matching straight or convergent hub could make the blade root separated vortex move backwards, reduce the separated area to 5% of blade height and increase at least 2 percentage points of the fan efficiency.
- large scale axial fan /
- total pressure efficiency /
- outlet hub geometry /
- structure matching /
- blade root separated vortex

HTML

参考文献(15)

[1]	马宏伟, 蒋浩康, 聂超群.轴流风机转子通道内尖区三维流场[J].工程热物理学报, 1998, 19(1):45-48. MA Hongwei, JIANG Haokang, NIE Chaoqun.Three-dimensional turbulent flow field in the region of an axial-flow fan rotor passage[J].Journal of Engineering Thermophysics, 1998, 19(1):45-48.(in Chinese)
[2]	竺晓程, 林万来, 杜朝辉.轴流通风机叶顶区域流动的实验研究[J].上海交通大学学报, 2005, 39(2):177-181. ZHU Xiaocheng, LIN Wanlai, DU Chaohui.Experimental study on the tip leakage flow of an axial fan[J].Journal of Shanghai Jiaotong University, 2005, 39(2):177-181.(in Chinese)
[3]	李杨, 欧阳华, 杜朝辉.周向弯曲低压轴流风机叶顶泄漏流动数值研究[J].工程热物理学报, 2005, 26(2):240-243. LI Yang, OUYANG Hua, DU Chaohui.Numerical study of leakage flow of the low pressure aixal flow fans with circumferential skewed blades[J].Journal of Engineering Thermophysics, 2005, 26(2):240-243.(in Chinese)
[4]	王军, 姚瑞锋, 刘静, 等.低压轴流风机叶顶间隙对叶尖涡及外部性能的影响研究[J].流体机械, 2011, 39(9):26-30. WANG Jun, YAO Ruifeng, LIU Jing, et al.Influence of tip clearance on external performance and tip leakage vortex of low-pressure axial fan[J].Fluid Machinery, 2011, 39(9):26-30.(in Chinese)
[5]	李景银, 陈魏巍, 吕峰.带有前后导叶的新型可逆轴流风机数值研究[J].机械工程学报, 2010, 46(2):139-144. LI Jingyin, CHEN Weiwei, LÜ Feng.Numerical investigation on a new type of fully reversible axial fan with two blade rows on both sides of the rotor[J].Journal of Mechanical Engineering, 2010, 46(2):139-144.(in Chinese)
[6]	叶学民, 李俊, 王松岭, 等.带后导叶轴流式通风机内流特征的数值模拟[J].热能动力工程, 2009, 24(2):163-166. YE Xuemin, LI Jun, WANG Songling, et al.Numerical simulation of the inner flow characteristics of an axial fan with rear guide vanes[J].Journal of Engineering for Thermal Energy and Power, 2009, 24(2):163-166.(in Chinese)
[7]	刘飞, 吴克启.大型轴流风机来流条件对内流影响的数值分析[J].工程热物理学报, 2006, 27(1):145-148. LIU Fei, WU Keqi.Numerical analysis of internal flow effect from inlet flow conditions in large axial fan[J].Journal of Engineering Thermophysics, 2006, 27(1):145-148.(in Chinese)
[8]	李景银, 黄靓, 吕峰.带有进气箱的轴流风机性能变化数值分析[J].工程热物理学报, 2007, 28(1):161-164. LI Jingyin, HUANG Liang, LÜ Feng.Numerical studies of the effect of an inlet box on the performance of an axial flow fan[J].Journal of Engineering Thermophysics, 2007, 28(1):161-164.(in Chinese)
[9]	张夏, 楚武利, 邓文剑, 等.轴流风机中支板通道的流动分析与改进[J].航空动力学报, 2006, 21(6):1048-1052. ZHANG Xia, CHU Wuli, DENG Wenjian, et al.Flow analysis and the improvement of axial fan support strut[J].Journal of Aerospace Power, 2006, 21(6):1048-1052.(in Chinese)
[10]	杨春, 李秋实, 袁巍, 等.风机结构形式对其性能影响的数值与实验研究[J].航空动力学报, 2005, 20(3):512-517. YANG Chun, LI Qiushi, YUAN Wei, et al.Numerical and experimental investigation of the fan structure effects on performance[J].Journal of Aerospace Power, 2005, 20(3):512-517.(in Chinese)
[11]	舒士甄.叶轮机械原理[M].北京:清华大学出版社, 1991.
[12]	陈海生, 谭春青, 康顺, 等.轮毂间隙对轴流风机性能和流场影响的数值与实验研究[J].流体机械, 2006, 34(2):1-6. CHEN Haisheng, TAN Chunqing, KANG Shun, et al.Numerical and experimental study on effects of hub leakage on performance and flow field of axial fan[J].Fluid Machinery, 2006, 34(2):1-6.(in Chinese)
[13]	张玉成, 仪登利, 冯殿义, 等.通风机设计与选型[M].北京:化学工业出版社, 2011.
[14]	乔清华, 钟芳源, 杨波.轴流风机的进口径向畸变研究[J].航空动力学报, 2009, 24(5):1114-1121. QIAO Qinghua, ZHONG Fangyuan, YANG Bo.Investigation on the inlet radial distortion of axial-flow fan[J].Journal of Aerospace Power, 2009, 24(5):1114-1121.(in Chinese)
[15]	毛军, 杨立国, 郗艳红.大型轴流风机叶片的气动弹性数值分析研究[J].机械工程学报, 2009, 45(11):133-139. MAO Jun, YANG Liguo, XI Yanhong.Numeric analysis of on the pneumatic elasticity of large axial-flow fan blade[J].Journal of Mechanical Engineering, 2009, 45(11):133-139.(in Chinese)