DOI QR코드

DOI QR Code

Wind pressure measurements on a cube subjected to pulsed impinging jet flow

  • Mason, M.S. (School of Civil Engineering, University of Sydney) ;
  • James, D.L. (Department of Mechanical Engineering, Texas Tech University) ;
  • Letchford, C.W. (School of Engineering, University of Tasmania)
  • 투고 : 2008.06.26
  • 심사 : 2008.12.17
  • 발행 : 2009.01.25

초록

A pulsed impinging jet is used to simulate the gust front of a thunderstorm downburst. This work concentrates on investigating the peak transient loading conditions on a 30 mm cubic model submerged in the simulated downburst flow. The outflow induced pressures are recorded and compared to those from boundary layer and steady wall jet flow. Given that peak winds associated with downburst events are often located in the transient frontal region, the importance of using a non-stationary modelling technique for assessing peak downburst wind loads is highlighted with comparisons.

키워드

참고문헌

  1. Alahyari, A. and Longmire, E.K. (1995), "Dynamics of experimentally simulated microbursts", AIAA J., 33(11), 2128-2136. https://doi.org/10.2514/3.12957
  2. American Society of Civil Engineers (2005), Minimum design loads for buildings and other structures, ASCE Standard, ASCE/SEI 7-05, American Society of Civil Engineers, New York.
  3. Bedard, A.J. and Caplan, S.J. (1987), "Microburst vorticity", 25th Aerospace Science Meeting, American Institute of Aeronautics and Astronautics, Reno.
  4. Chay, M.T. (2001), "Simulation of thunderstorm downbursts", MSCE Thesis, Texas Tech University.
  5. Chay, M.T. and Letchford, C.W. (2002), "Pressure distributions on a cube in a simulated thunderstorm downburst, Part A: Stationary downburst observations", J. Wind Eng. Ind. Aerod., 90, 711-732. https://doi.org/10.1016/S0167-6105(02)00158-7
  6. Durst, C.S. (1960), "Wind speeds over short periods of time", Meteorol. Mag., 89, 181-186.
  7. Forbes, G.S. and Wakimoto, R.M. (1983), "A concentrated outbreak of tornadoes, downbursts and microbursts, and implications regarding vortex classification", Monthly Weather Review, 111, 220-235. https://doi.org/10.1175/1520-0493(1983)111<0220:ACOOTD>2.0.CO;2
  8. Fujita, T.T. (1981), "Tornadoes and downbursts in generalized planetary scales", J. Atmos. Sci., 38, 1511-1534. https://doi.org/10.1175/1520-0469(1981)038<1511:TADITC>2.0.CO;2
  9. Fujita, T.T. (1985), Downburst: Microburst and macroburst, Univ. of Chicago Press, Chicago, Illinois.
  10. Fujita, T.T. (1990), "Downbursts: meteorological features and wind field characteristics", J. Wind Eng. Ind. Aerod., 36, 75-86. https://doi.org/10.1016/0167-6105(90)90294-M
  11. Hjelmfelt, M.R. (1988), "Structure and life cycle of microburst outflows observed in Colorado", J. Appl. Meteorol., 27, 900-927. https://doi.org/10.1175/1520-0450(1988)027<0900:SALCOM>2.0.CO;2
  12. Holmes, J.D. (1992), "Physical modeling of thunderstorm downdrafts by wind-tunnel jet", 2nd Australasian Wind Engineering Society Workshop on Wind Engineering, Melbourne, February 20-21.
  13. Holmes, J.D. (2002), "A re-analysis of record extreme wind speeds in region A", Aust. J. Struct. Eng., 4, 29-40.
  14. Kim, J.D. and Hangan, H.M. (2007), "Numerical characterization of impinging jets with application to downbursts", J. Wind Eng. Ind. Aerod., 95, 279-298. https://doi.org/10.1016/j.jweia.2006.07.002
  15. Kim, J.D., Hangan, H.M. and Ho, T.C.E. (2007), "Downbursts versus boundary layer induced wind loads for tall buildings", Wind Struc., 10, 481-494. https://doi.org/10.12989/was.2007.10.5.481
  16. Kline, S.J. and McClintock, F.A. (1953), "Describing Uncertainties in Single-sample Experiments", Mech. Eng., 75, 3.
  17. Letchford, C.W. and Chay, M.T. (2002), "Pressure distributions on a cube in a simulated thunderstorm downburst, Part B: Moving Downburst Observations", J. Wind Eng. Ind. Aerod., 90, 733-753. https://doi.org/10.1016/S0167-6105(02)00163-0
  18. Lin, E.W., Orf, L.G., Savory, E. and Novacco, C. (2007), "Proposed large-scale modelling of the transient features of a downburst outflow", Wind Struc., 10, 315-346. https://doi.org/10.12989/was.2007.10.4.315
  19. Lundgren, T.S., Yao, J. and Mansour, N.N. (1992), "Microburst modelling and scaling", J. Fluid Mech., 239, 461-488. https://doi.org/10.1017/S002211209200449X
  20. Mason, M.S. (2003), "Pulsed jet simulation of thunderstorm downbursts", MSCE Thesis, Civil Engineering, Texas Tech University.
  21. Mason, M.S. and Wood, G.S. (2004), "Loading of a very tall building in a simulated downburst wind field", Proc. of 11th Australasian Wind Engineering Society Workshop, Darwin, Australia.
  22. Mason, M.S., Letchford, C.W. and James, D.L. (2005), "Pulsed wall jet simulation of a stationary thunderstorm downburst, Part A: Physical structure and flow field characterization", J. Wind Eng. Ind. Aerod., 93, 557-580. https://doi.org/10.1016/j.jweia.2005.05.006
  23. McConville, A., Sterling, M. and Baker, C. (2007), "An introduction of the scaling issues associated with the physical simulation of thunderstorm downbursts", Proc. 12th Int. Conf. on Wind Engineering, 1431-1438, Cairns.
  24. Popiel, C.O. and Trass, O. (1991), "Visualization of a free and impinging round jet", Exp. Therm. Fluid Sci., 4, 253-264. https://doi.org/10.1016/0894-1777(91)90043-Q
  25. Proctor, F.H. (1988), "Numerical simulations of an isolated microburst, Part 1: Dynamics and Structure", J. Atmos. Sci., 45, 3137-3159. https://doi.org/10.1175/1520-0469(1988)045<3137:NSOAIM>2.0.CO;2
  26. Richards, P., Hoxey, R.P. and Short, L.J. (2000), "Wind pressures on a 6m cube", Fourth International Colloquium on Bluff Body Aerodynamics and Applications, Ruhr University, Bochum, Germany, 515-518.
  27. Standards Australia (2002), Structural design actions, Part 2: Wind actions, Standards Australia, Sydney, NSW, Australia.
  28. Selvam, R.P. and Holmes, J.D. (1992), "Numerical simulation of thunderstorm downdrafts", J. Wind Eng. Ind. Aerod., 41-44, 2817-2825.
  29. Twisdale and Vickery, P.J. (1992), "Research on thunderstorm wind design parameters", J. Wind Eng. Ind. Aerod., 41, 545-556. https://doi.org/10.1016/0167-6105(92)90461-I
  30. Wakimoto, R.M. (1982), "The life cycle of thunderstorm gust fronts as viewed with Doppler radar and rawinsonde data", Monthly Weather Review, 110, 1060-1082. https://doi.org/10.1175/1520-0493(1982)110<1060:TLCOTG>2.0.CO;2
  31. Wilson, J.W., Rita, D.R., Kessinger, C. and McCarthy, J. (1984), "Microburst wind structure and evaluation of Doppler radar for airport wind shear detection", J. Climate and Applied Meteorology, 23, 898-915. https://doi.org/10.1175/1520-0450(1984)023<0898:MWSAEO>2.0.CO;2
  32. Wood, G.S. and Kwok, K.C.S. (1998), "An empirically derived estimate for the mean velocity profile of a thunderstorm downdraft", Proc. of the 7th Australasian Wind Engineering Society Workshop, Auckland, N.Z.
  33. Wood, G.S., Kwok, K.C.S., Motteram, N.A. and Fletcher, D.F. (2001), "Physical and numerical modeling of thunderstorm downbursts", J. Wind Eng. Ind. Aerod., 89, 535-552. https://doi.org/10.1016/S0167-6105(00)00090-8
  34. Yao, J. and Lundgren, T.S. (1996), "Experimental investigation of microbursts", Exp. Fluids, 21, 17-25. https://doi.org/10.1007/BF00204631
  35. Zaman, K.B.M.Q. and Husain, A.K.M.F. (1980), "Vortex pairing in a circular jet under controlled excitation, Part 1: General jet response", J. Fluid Mech., 101, 449-491. https://doi.org/10.1017/S0022112080001760

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