段肖珑,欧阳华,吴亚东,杜朝辉
DUAN Xiao-long,OU YANG Hua,WU Ya-dong,DU Zhao-hui (Shanghai Jiao Tong University

• 1:上海交通大学

摘要(Abstract)：

以具有不同弯曲参数的周向弯曲动叶和同一径向静叶的组合为研究对象,采用数值计算工具进行了非定常模拟,分析了级间总压的脉动以及脉动的衰减过程;发现周向弯曲有利于级间流动掺混,使流场更均匀。通过相关分析精确捕捉不同周向弯曲动叶尾迹形状、传播过程,揭示出叶片周向弯曲参数和级间旋流对尾迹传播的影响。
Simulation of 3D circumferential skewed rotors′ unsteady flow was presented.Rotor circumferential skewing,which has a positive influence on wake mixing process,can accelerate decaying process of total pressure fluctuation.Skewing can also change the radial shape of the centerline of the rotor wake(wake profile)directly.At the same time,because of swirling flow between rotor and stator,wake profile is twisted.

关键词(KeyWords)： 轴流风扇;弯掠叶片;尾迹;CFD
axial flow fan;circumferential skew;transport of wake;CFD

Abstract:

Keywords:

基金项目(Foundation): 航空科学基金(2007ZB57)

作者(Author): 段肖珑,欧阳华,吴亚东,杜朝辉
DUAN Xiao-long,OU YANG Hua,WU Ya-dong,DU Zhao-hui (Shanghai Jiao Tong University

参考文献(References)：

• [1]Poensgen C,Gallus H E.Three-dimensional wakedecay Inside of a compressor cascade and Its Influenceon the downstream unsteady flow field:Part I-wakedecay characteristics in the flow passage[J].Journalof Turbomachinery,1991,113:180-189.
• [2]Uzol O,ChowY C,Katz J.Experimental investigationof unsteady flow field within a two-stage axial Turbo-machine using particle image velocimetry[J].Journalof Turbomachinery,2002,124:542-552.
• [3]Chow Y C,Uzol O,Katz J.Flownon-uniformities andturbulent“hot spots”due to wake-blade and wake-wake interactions in a multi-stage Turbomachine[J].Journal of Turbomachinery,2002,124:553-563.
• [4]王松涛,王仲奇,非定常条件下叶片弯曲对流场参数的影响[J].航空动力学报,2002,17(3):314-318.
• [5]Rao.GVR.Use of leaning vanes for fan noise reduc-tion,AIAA[Z].Paper,72-126.
• [6]Edmane Envia.Fan noise reduction:an overview.NASA/TM2001-210699 and AIAA[Z].Paper,2001?0661.
• [7]Edmane Envia.Design selection and analysis of aswept and leaned stator concept[J].Journal ofSound and vibration,1999,228(4):793-836.
• [8]李杨,欧阳华,杜朝辉.叶片的不同周向弯曲对低压轴流风扇性能影响的对比分析[J].上海交通大学学报,2006,40(12):2101-2105.
• [9]欧阳华,李杨,杜朝辉.周向弯曲方向对弯掠叶片气动-声学性能影响的实验研究[J].航空动力学报,2006,21(4):668-674.
• [10]王仲奇,郑严.叶轮机械弯扭叶片的研究现状及发展趋势[J].中国工程科学,2000,2(6):40-48.