DOI QR코드

DOI QR Code

Effects of turbulent boundary layer thickness on flow around a low-rise rectangular prism

  • Kim, Kyung Chun (School of Mechanical Engineering, Pusan National University) ;
  • Ji, Ho Seong (School of Mechanical Engineering, Pusan National University) ;
  • Seong, Seung Hak (School of Mechanical Engineering, Pusan National University)
  • 투고 : 2005.01.18
  • 심사 : 2005.08.25
  • 발행 : 2005.12.25

초록

The effects of upstream velocity profiles on the flow around a low-rise rectangular prism submerged in a turbulent boundary layer have been investigated. Three different boundary layer profiles are generated, which are characterized by boundary layer height, displacement thickness, and momentum thickness. Flow characteristics variations caused by the different layers such as those in turbulent kinetic energy distribution and locations of re-circulating cavities and reattachment points have been precisely measured by using a PIV (Particle Image Velocimetry) technique. Observations were made in a boundary layer wind tunnel at $Re_H$=7900, based on a model height of 40 mm and a free stream velocity of 3 m/s with 15 - 20% turbulence intensity.

키워드

참고문헌

  1. Bearman, B.E. and Obasaju, E.D. (1982), "An experimental study of pressure fluctuations on fixed and oscillation square-section cylinders", J. Fluid Mech., 119, 297-321. https://doi.org/10.1017/S0022112082001360
  2. Saathoff, P.J. and Melbourne, W.H. (1997), "Effects of free-stream turbulence on surface pressure fluctuations in a separation bubble", J. Fluid Mech., 337, 1-24. https://doi.org/10.1017/S0022112096004594
  3. Hosker Jr., R.P. (1984), "Flow and diffusion near obstacles", in Darryl Randerson (Eds.), Atmospheric Science and Power Production, DOE/TIC-27601, U.S. Department of Energy, 241-326.
  4. Tieleman, H.W. and Akins, R. (1996), "The effect of incident turbulence on the surface pressures of surfacemounted prisms", J. Fluid Struct., 10, 367-393. https://doi.org/10.1006/jfls.1996.0024
  5. Wu, F., Sarkar, P.P., Mehta, K.C. and Zhao, Z. (2001), "Influence of incident wind turbulence on pressure fluctuations near flat-roof corner", J. Wind Eng. Ind. Aerodyn., 89, 403-420. https://doi.org/10.1016/S0167-6105(00)00072-6
  6. Whitebread, R.E. and Scruton, C. (1965), "An investigation of the aerodynamics stability of a model of the proposed tower blocks for the world trade center", New York, Aero Report No. 1165, National Physical Laboratory, Teddington, July.
  7. Cermak, J.E. and Cochran, L. (1992), "Physical modeling of atmospheric surface layer", J. Wind Eng. Ind. Aerodyn., 41-44, 935-946.
  8. Tieleman, H.W., Surry, D. and Mehta, K.C. (1996), "Full/model scale comparison of surface pressures on the Texas Tech experimental building", J. Wind Eng. Ind. Aerodyn., 61, 1-23. https://doi.org/10.1016/0167-6105(96)00042-6
  9. Levitan, M.L. and Mehta, K.C. (1992), "Texas Tech field experiments for wind loads part 1: building and pressure measuring system", J. Wind Eng. Ind. Aerodyn., 41-44, 1565-1576.
  10. Bienkiewicz, B. (1992), "Local wind loading on the roof of a low-rise building", J. Wind Eng. Ind. Aerodyn., 45, 11-24. https://doi.org/10.1016/0167-6105(92)90003-S
  11. Banks, D., Meroney, R.N., Sarkar, P.P., Zhao, Z. and Wu, F. (2000), "Flow visualization of conical vortices on flat roofs with simultaneous surface pressure measurement", J. Wind Eng. Ind. Aerodyn., 84, 65-85. https://doi.org/10.1016/S0167-6105(99)00044-6
  12. Arie, M. and Rouse, H. (1956), "Experiments on two-dimensional flow over a normal wall", J. Fluid Mech., 1(Pt. 2), 129-141. https://doi.org/10.1017/S0022112056000093
  13. Wilson, D.J. (1979), "Flow patterns over flat-roofed buildings and application to exhaust stack design", ASHRAE Trans., 85(Pt. 2), 284-295.

피인용 문헌

  1. Flow structures around a three-dimensional rectangular body with ground effect vol.11, pp.5, 2008, https://doi.org/10.12989/was.2008.11.5.345