INFLUENCE OF TIP CLEARANCE ON AERODYNAMIC-AEROACOUSTIC PERFORMANCE OF SKEWED-SWEPT ROTATING BLADES

Cai Na; Li Di; Zhong Fangyuan

Volume 12 Issue 1

Jan. 1997

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Article Navigation > Journal of Aerospace Power > 1997 > 12(1): 21-25,105

Cai Na, Li Di, 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.

Citation:

Cai Na, Li Di, 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.

Cai Na, Li Di, 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.

Citation:

Cai Na, Li Di, 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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INFLUENCE OF TIP CLEARANCE ON AERODYNAMIC-AEROACOUSTIC PERFORMANCE OF SKEWED-SWEPT ROTATING BLADES

1.
Dept.of Power Energy Engineering, North China University of Electric Power 100085
2.
2nd Dept.Shanghai Jiaotong University, Shanghai 200030

Received Date: 1996-03-01
Rev Recd Date: 1996-06-01
Publish Date: 1997-01-28

Abstract

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.
- Axial fans,
- Blades,
- Clearance,
- Aerodynamic,
- Characteristics