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논문 기본 정보

자료유형
학술저널
저자정보
Mason, M.S. (School of Civil Engineering, University of Sydney) Wood, G.S. (Cermak Peterka Petersen) Fletcher, D.F. (School of Chemical and Biomolecular Engineering, University of Sydney)
저널정보
테크노프레스 Wind & structures Wind & structures 제12권 제3호
발행연도
2009.1
수록면
179 - 204 (26page)

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A physical and numerical steady flow impinging jet has been used to simulate the bulk characteristics of a downburst-like wind field. The influence of downdraft tilt and surface roughness on the ensuing wall jet flow has been investigated. It was found that a simulated downdraft impinging the surface at a non-normal angle has the potential for causing larger structural loads than the normal impingement case. It was also found that for the current impinging jet simulations, surface roughness played a minor role in determining the storm maximum wind structure, but this influence increased as the wall jet diverged. However, through comparison with previous research it was found that the influence of surface roughness is Reynolds number dependent and therefore may differ from that reported herein for full-scale downburst cases. Using the current experimental results an empirical model has been developed for laboratory-scale impinging jet velocity structure that includes the influence of both jet tilt and surface roughness.

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