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Wind and Structures Volume 15, Number 6, November 2012 , pages 509-529 DOI: https://doi.org/10.12989/was.2012.15.6.509 |
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Pressure field of a rotating square plate with application to windborne debris |
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P. Martinez-Vazquez, B. Kakimpa, M. Sterling, C.J. Baker, A.D. Quinn, P.J. Richards and J.S. Owen
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| Abstract | ||
| Traditionally, a quasi steady response concerning the aerodynamic force and moment coefficients acting on a flat plate while \'flying\' through the air has been assumed. Such an assumption has enabled the flight paths of windborne debris to be predicted and an indication of its potential damage to be inferred. In order to investigate this assumption in detail, a series of physical and numerical simulations relating to flat plates subject to autorotation has been undertaken. The physical experiments have been carried out using a novel pressure acquisition technique which provides a description of the pressure distribution on a square plate which was allowed to auto-rotate at different speeds by modifying the velocity of the incoming flow. The current work has for the first time, enabled characteristic pressure signals on the surface of an auto-rotating flat plate to be attributed to vortex shedding. | ||
| Key Words | ||
| auto-rotation; surface pressures; coherent structures; vortex shedding | ||
| Address | ||
| P. Martinez-Vazquez, Sterling, C.J. Baker, A.D. Quinn and J.S. Owen : School of Civil Engineering, University of Birmingham, UK B. Kakimpa : Department of Civil Engineering, University of Nottingham, UK P.J. Richards : Department of Mechanical Engineering, University of Auckland, New Zealand | ||