凹坑叶片对前置机架轴流风机的性能影响研究  

Influence of Pits Blade on the Performance of Axial Fan with Front-mounted Motor Frame Motor Frame

作　　者：张旭 龚玉祥 郭荣荣 黄峰 阮晓东[3] Xu Zhang;Yu-xiang Gong;Rong-rong Guo;Feng Huang;Xiao-dong Ruan(Boreasa Technologies Co.,Ltd.;School of Mechanical&Energy Engineering,Zhejiang University of Science and Technology;State Key Laboratory of Fluid Power and Mechatronics Systems,Zhejiang University)

机构地区：[1]杭州贝丰科技股份有限公司 [2]浙江科技学院机械与能源工程学院 [3]浙江大学流体动力与机电系统国家重点实验室

出　　处：《风机技术》2023年第1期16-23,共8页Chinese Journal of Turbomachinery

基　　金：浙江省自然科学基金(LY20E050013);国家自然科学基金创新研究群体基金项目(51821093)。

摘　　要：受高尔夫球表面凹坑减阻设计启发,本文研究了在风机叶片表面制造小凹坑来提高风机的气动性能。本研究通过数值计算和实验测试对比了原型叶片和凹坑叶片对8038前置电机架轴流风机的气动性能的影响。数值结果表明:前置电机架使得叶轮流道速度分布不均匀,气流在电机架后形成速度亏损并形成大尺度旋涡。风机出口处的压力脉动主频为风机的叶频。凹坑叶片明显改善了流道内速度梯度分布,减小了前置电机架绕流旋涡的尺度以及风机出口处压力脉动幅值。实验测试凹坑叶片风机最大流量提高了3.2%,最大压力提高了1.4%,在失速点最大压力提高了8.3%,噪声降低了0.5dB(A),性能提升效果明显,该研究为轴流风机的优化设计提供了参考。In this paper,small pits were made on the fan blade surface to improve the fan aerodynamic performance which inspired from the drag force reduction design of golf balls.The performance effect of original blade and pits blade on axial fan with front-mounted motor frame is compared by numerical calculation and experiment.The numerical results show that front-mounted motor frame brings the velocity not uniform in impeller flow channel,the velocity deficit appears and large-scale vortex formed.The pressure pulsation main frequency at the fan outlet is the fan blade frequency.The pits blade improves the distribution of velocity gradient and the vortex scale from front-mounted motor steaming,reduces the pressure pulsation amplitude at fan inlet.The experiments results show that the maximum flowrate of pits blades fan is rised by 3.2%,the maximum pressure is rised by 1.4%,the maximum pressure at the stall points is rised by 8.3%,the noise is reduced 0.5dB(A).The performance improvement obviously which bring the theoretical guidance of axial fan optimal design.

关 键 词：轴流风机 凹坑叶片 压力脉动 噪声 

分 类 号：TH432.1[机械工程—机械制造及自动化]