| 弯掠动叶叶尖径向间隙对气动──声学性能的影响 |
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| 引用本文： | 蔡娜,李地,钟芳源.弯掠动叶叶尖径向间隙对气动──声学性能的影响[J].航空动力学报,1997,12(1):21-25,105. |
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| 作者姓名： | 蔡娜 李地 钟芳源 |
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| 作者单位： | 1.Dept.of Power Energy Engineering, North China University of Electric Power 100085 |
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| 摘 要： | 采用了两种修正叶尖径向间隙的方法:一种是利用实验结果减小径向动叶叶尖径向间隙,使之与弯掠动叶相同,弯掠动叶气动效率提高3%-4%,气动噪声降低2-3dB（A）,稳定工作范围扩大20%以上；另一种是利用修正公式（增大弯掠动叶径向间隙）计算弯掠动叶气动-声学性能。
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| 关 键 词： | 轴流风机 叶片 间隙型密封 气动特性 声性质 |
| 收稿时间： | 3/1/1996 12:00:00 AM |
| 修稿时间： | 6/1/1996 12:00:00 AM |
INFLUENCE OF TIP CLEARANCE ON AERODYNAMIC-AEROACOUSTIC PERFORMANCE OF SKEWED-SWEPT ROTATING BLADES |
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| Cai N,Li Di and Zhong Fangyuan.INFLUENCE OF TIP CLEARANCE ON AERODYNAMIC-AEROACOUSTIC PERFORMANCE OF SKEWED-SWEPT ROTATING BLADES[J].Journal of Aerospace Power,1997,12(1):21-25,105. |
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| Authors: | Cai N Li Di and Zhong Fangyuan |
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| Institution: | 1.Dept.of Power Energy Engineering, North China University of Electric Power 1000852.2nd Dept.Shanghai Jiaotong University, Shanghai 200030 |
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| Abstract: | Noise characteristics of tip clearance in a fan and engineering aerodynamic-aeroacoustic performance are obtained from skewed-swept rotating blades.Two methods of tip clearance modification have been carried out:(1)Experimental results are applied to decreasing the radial tip clearances of the rotating blades,thereby the aerodynamic efficiency increases about 3-4 percent,the average noise is reduced by 2-3 dB(A),and the steady working margin is widened over 20 percent;(2)Aerodynamic-aeroacoustic characteristics are calculated with a revised formula. |
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| Keywords: | Axial fans Blades Clearance Aerodynamic Characteristics Acoustic properties |
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