[1]刘刚,王雷,刘小民.叶尖小翼对轴流风机气动性能及噪声特性影响的数值研究[J].西安交通大学学报,2020,54(07):104-112.[doi:10.7652/xjtuxb202007013]
 LIU Gang,WANG Lei,LIU Xiaomin.Numerical Investigation on Effects of Blade Tip Winglet on Aerodynamic and Aeroacoustic Performances of Axial Flow Fan[J].Journal of Xi'an Jiaotong University,2020,54(07):104-112.[doi:10.7652/xjtuxb202007013]
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叶尖小翼对轴流风机气动性能及噪声特性影响的数值研究
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《西安交通大学学报》[ISSN:0253-987X/CN:61-1069/T]

卷:
54
期数:
2020年第07期
页码:
104-112
栏目:
出版日期:
2020-07-08

文章信息/Info

Title:
Numerical Investigation on Effects of Blade Tip Winglet on Aerodynamic and Aeroacoustic Performances of Axial Flow Fan
文章编号:
0253-987X(2020)07-0104-09
作者:
刘刚 王雷 刘小民
西安交通大学能源与动力工程学院, 710049, 西安
Author(s):
LIU Gang WANG Lei LIU Xiaomin
School of Energy and Power Engineering, Xi’an Jiaotong University, Xi’an 710049, China
关键词:
轴流风机 大涡模拟 气动噪声 叶尖小翼 叶尖泄漏涡 叶尖分离涡
Keywords:
axial flow fan large eddy simulation aerodynamic noise blade tip winglet tip leakage vortex tip separation vortex
分类号:
TH443; TB535
DOI:
10.7652/xjtuxb202007013
文献标志码:
A
摘要:
为了控制轴流风机叶顶泄漏流造成的气动损失和噪声,在轴流风机叶片顶部添加了融合式叶尖小翼结构,并对风机的气动性能及噪声特性进行了数值研究。采用大涡模拟结合声类比方程的数值方法,研究了叶尖小翼对轴流风机流场和声场的影响。通过对风机叶尖流场和声场进行分析,对比不同外倾角的融合式叶尖小翼周围的涡场结构以及表面声压脉动,分析了不同外倾角小翼对叶尖泄漏流的控制作用以及叶尖小翼对风机气动性能和噪声特性产生的影响。结果显示:叶尖小翼结构可以有效抑制叶尖泄漏涡以及叶尖分离涡的发展,降低轴流风机的气动噪声,提高轴流风机静压效率; 使用20°外倾角的叶尖小翼,风机静压效率提高了1.1%,噪声降低了5.0 dB; 叶尖泄漏流造成的气动噪声主要是宽频噪声,叶尖小翼可以明显降低轴流风机的宽频噪声; 通过优化叶尖小翼的外倾角可以在不损害风机气动性能的同时实现较好的降噪效果。
Abstract:
To reduce aerodynamic loss and noise caused by the tip leakage flow in an axial flow fan, fused winglets are added on the top of the blades of the axial flow fan. The influence of winglets on the flow field and sound field of the axial flow fan are investigated with numerical method of large eddy simulation and FW-H acoustic analogy. The tip leakage flows are compared under the influences of winglets with different camber angles. Analyzing the flow field and sound field, and comparing the vorticity distributions around the fused blade tip winglets with different camber angles and the surface sound pressure pulsation, the effect of the different camber angle of winglets on the tip leakage flow and the influence of the tip winglets on the fan aerodynamic performance and noise characteristics are discussed. The results show that the winglet can effectively control the development of tip leakage vortex and tip separation vortex, reduce the aerodynamic noise of the axial flow fan, and improve the static pressure efficiency of the axial flow fan. The static pressure efficiency increases by 1.1% and noise decreases by 5.0 dB by utilizing the blade tip winglets with 20° camber angle. The aerodynamic noise caused by tip leakage flow is mainly broadband noise, and the winglet can significantly weaken the broadband noise. Optimizing the camber angle of the winglet, the noise reduction can be achieved without damaging the aerodynamic performance.

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备注/Memo

备注/Memo:
收稿日期: 2019-12-07。作者简介: 刘刚(1997—),男,硕士生; 刘小民(通信作者),男,教授。基金项目: 国家自然科学基金资助项目(51676152)。
更新日期/Last Update: 2020-07-10