周向弯曲方向对弯掠叶片气动-声学性能影响的实验

欧阳华; 李杨; 杜朝辉; 钟芳源

周向弯曲方向对弯掠叶片气动-声学性能影响的实验

上海交通大学机械与动力工程学院, 上海 200030

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出版历程
- 收稿日期: 2005-09-28
- 修回日期: 2006-01-16
- 刊出日期: 2006-08-28

Experimental study on aerodynamic and aero-acoustic performance of low pressure axial flow fan with circumferential skewed blades

School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai 200030, China

摘要

摘要: 以具有相同几何参数的常规径向叶片、周向前弯和周向后弯叶片为研究对象,对旋转动叶片周向弯曲后叶轮的气动和声学性能进行了对比试验研究。同时采用五孔探针半对向测量方法研究了周向弯曲后出口气流参数沿叶高的分布规律。结果表明,与原型径向叶轮相比,在保持叶片几何参数不变,仅引入周向弯曲后,无论周向前弯还是后弯,均导致叶轮的效率和压升降低。叶片周向前弯可以有效地降低气动噪声,大幅度地增加风扇的喘振裕度。在相同的周向弯曲角度下,采用周向前弯技术明显优于周向后弯。此外,研究表明弯掠叶片径向力对于气流参数沿叶高的分布具有较大的影响。周向前弯叶轮改善了叶顶附近的流动状况,但中部叶高区域的损失增加。对于周向后弯叶轮,虽然叶片中部损失减小,但两端部损失增加明显。
- 航空、航天推进系统 /
- 叶轮机械 /
- 低压轴流风机 /
- 弯掠叶片 /
- 周向弯曲 /
- 气动-声学性能
Abstract: Low pressure axial flow fan with circumferential skewed rotors was studied.The rotors include the traditional radial rotor,the forward-skewed rotor and the backward-skewed rotor.In present study,aerodynamic and aeroacoustic performance of these three type rotors was measured and analyzed.The results show that the forward-skewed rotor may reduce noise effectively and extend the range of steady operation compared to the radial rotor.With the same skew angle,both the aerodynamic and aeroacoustic performance of forward-skewed rotor is better than that of the backward-skewed one.The performance difference comes from the direction of blade radial force.The tip flow condition of forward-skewed rotor is better,but the mid-span losses are increased.
- aerospace propulsion system /
- turbomachinery /
- low pressure axial flow fan /
- skewed and swept rotor /
- circumferential skewed blade /
- aerodynamic and aeroacoustic performance

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参考文献(8)

[1]	Edmane Envia.Fan noise reduction:an overview[R].Glenn Research Center,Cleveland:AIAA Paper 2001-0661.
[2]	陈矛章.风扇/压气机技术发展和对今后工作的建议[J].航空动力学报,2002,17(1):1-15.Chen Maozhang.Development of fan/compressor techniques and suggestions on further researches[J].Journal of Aerospace Power,2002,17(1):1-15.
[3]	钟芳源.节能低噪轴流/离心风机(理论,计算,设计,实验研究)论文集[C].北京:机械工业出版社,1994.
[4]	Yamaguchi N,Tominaga T,Mitsubishi T.Secondary loss reduction by forward skewing of axial compressor rotor blading[R].Proceeding of 1991 Yokohama International Gas Turbine Congress,1991,12:61-68.
[5]	Sasaki T,Breugelmans F.Comparison of sweep and dihedral effects on compressor cascade performance[J].Journal of Turbomachinery,Transactions of ASME,1998,120(3):454-464.
[6]	Beiler M G,Carolus T H.Computation and measurement of the flow in axial flow fans with skewed blades[J].Journal of Turbomachinery,Transactions of ASME,1999,121(1):59-66.
[7]	欧阳华.新型可逆式弯掠组合叶片的研究[D].上海:上海交通大学,2002.
[8]	姜桐,吴克启.叶轮机械内部流动实验分析方法[M].北京:机械工业出版社,1989.