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논문 기본 정보

자료유형
학술저널
저자정보
Martinez-Vazquez, P. (School of Civil Engineering, University of Birmingham) Sterling, M. (School of Civil Engineering, University of Birmingham) Baker, C.J. (School of Civil Engineering, University of Birmingham) Quinn, A.D. (School of Civil Engineering, University of Birmingham) Richards, P.J. (Department of Mechanical Engineering, University of Auckland)
저널정보
테크노프레스 Wind & structures Wind & structures 제14권 제2호
발행연도
2011.1
수록면
167 - 186 (20page)

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This paper presents the results of measurements relating to the aerodynamic forces on flat square plates which were allowed to rotate at different speeds about their horizontal axis, by modifying the velocity of the incoming flow. A 1 m square test-sheet and a 0.3 m square test-sheet were fitted with a number of pressure sensors in order to obtain information relating to the instantaneous pressure distribution acting on the test-sheet; a compact gyroscope to record the angular velocity during the rotational motion was also implemented. Previous work on autorotation has illustrated that the angular velocity varies with respect to the torque induced by the wind, the thickness and aspect ratio of the test-sheet, any frictional effects present at the bearings, and the vorticity generated through the interaction between the plate and the wind flow. The current paper sets out a method based on the solution of the equation of motion of a rotating plate which enables the determination of angular velocities on autorotating elements to be predicted. This approach is then used in conjunction with the experimental data in order to evaluate the damping introduced by the frictional effects at the bearings during steady autorotation.

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