Experimental Study on Unsteady Aerodynamic Characteristics of an Oscillating Cascade with Tip Clearance
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概要
- 論文の詳細を見る
An experimental study was conducted for revealing unsteady aerodynamic characteristics of oscillating cascades with tip clearance. To obtain aerodynamic forces acting on blades, the surface pressure was measured in both the chordwise and spanwise directions. To evaluate the aerodynamic forces due to oscillations of arbitrary interblade phase angle, the method of influence coefficients was adopted. Tip clearances were changed from 0.056% to 2.8% of the blade span. The aerodynamic blade loading was also changed. Results show that the tip clearance has a strong influence on the distribution of unsteady aerodynamic forces along the blade span : when tip clearance exists, aerodynamic damping forces decrease considerably over a large portion of the blade span. However, when steady aerodynamic loading acts on the blades, the influence of tip clearance is suppressed. The tip vortex increases the absolute value of the unsteady aerodynamic force in the region near the blade tip.
- 一般社団法人日本機械学会の論文
- 1988-11-15
著者
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Watanabe Toshinori
Department Of Aeronautics And Astronautics The University Of Tokyo
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Kaji Shojiro
Department Of Aeronautics And Astronautics Faculty Of Engineering The University Of Tokyo
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Watanabe Toshinori
Department Of Mechanical Engineering Tokyo University Of Agriculture And Technology
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