| 变工况下周向弯曲风扇叶顶涡声特性 |
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| 引用本文： | 金光远,欧阳华,胡彬彬,吴亚东,杜朝辉.变工况下周向弯曲风扇叶顶涡声特性[J].上海交通大学学报,2011,45(6):935-939. |
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| 作者姓名： | 金光远 欧阳华 胡彬彬 吴亚东 杜朝辉 |
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| 作者单位： | (1. 上海交通大学 机械与动力工程学院， 上海 200240； 2. 江南大学 机械工程学院， 江苏 无锡 214122) |
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| 基金项目： | 国家自然科学基金资助项目(51076101) |
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| 摘 要： | 采用计算流体力学数值方法研究变工况下周向弯曲低压轴流风扇的叶顶泄漏流动特性，结合涡声理论分析泄漏涡与声源的协同特性，分析叶片不同周向弯曲方向对协同性的影响，并通过近场机匣壁面动态压力测量和远场声学测量，验证叶片周向弯曲方向对近远场声学特性的控制规律.研究表明，泄漏涡声源是周向弯曲叶轮小流量工况下的重要声源，速度矢量与涡矢量的夹角值控制叶顶区域声源强度和分布.近远场实验结果表明，泄漏涡声源与远场声学关系密切.
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| 关 键 词： | 周向弯曲 变工况 泄漏涡 涡声特性 协同性 |
| 收稿时间： | 2010-03-26 |
Research of Aerodynamic Noise Source in Tip Region of Axial Fans with Circumferential Skewed Blades at Off-Design Conditions |
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| JIN Guang-yuan,OUYANG Hua,HU Bin-bin,WU Ya-dong,DU Zhao-hui.Research of Aerodynamic Noise Source in Tip Region of Axial Fans with Circumferential Skewed Blades at Off-Design Conditions[J].Journal of Shanghai Jiaotong University,2011,45(6):935-939. |
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| Authors: | JIN Guang-yuan OUYANG Hua HU Bin-bin WU Ya-dong DU Zhao-hui |
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| Affiliation: | (1. School of Mechanical Engineering, Shanghai Jiaotong University, Shanghai 200240, China; 2. School of Mechanical Engineering, Jiangnan University, Wuxi 214122, Jiangsu, China) |
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| Abstract: | Aerodynamic noise source generated by tip leakage flow in circumferential skewed axial fans was studied by CFD simulation and experiments under off-design conditions.Relationship between tip leakage flow and aerodynamic noise was analyzed based on vortex-sound theory of low speed homentropic flow.Synergy between acoustic source and tip leakage vortex was discussed.Pressure test on casing wall and acoustic far field test were conducted to find how the different circumferential skewed direction control acoust... |
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| Keywords: | circumferential skewed off-designed tip leakage vortex vortex acoustic synergy |
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