Theoretical Study on the Unsteady Aerodynamic Characteristics of an Oscillating Cascade with Tip Clearance (In the Case of a Nonloaded Cascade)
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概要
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This paper describes a theoretical analysis based on potential flow. By use of the vortex lattice method, calculations were performed to obtain unsteady aerodynamic forces acting on oscillating blades with tip clearances. Calculated damping forces in the case of large tip clearance showed good agreement with the experimental data. When the clearance was small, however, a discrepancy was found between the experimental and analytical results .This discrepancy was thought to be ascribable to the viscous effect of the flow near the blade tips. To explain the experimental data it was necessary to apply a model such that each blade should retain finite circulation at the extremity of its tip. From the calculated results for various reduced frequencies it was confirmed that aerodynamic characteristics found in the experimental study could be applied equally to the wide range of reduced frequencies.
- 一般社団法人日本機械学会の論文
- 1989-08-15
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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