Wind and Structures

  • 제11권5호
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  • Pages.413-426
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  • 2008
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  • 1226-6116(pISSN)
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  • 1598-6225(eISSN)
테크노프레스 (Techno-Press)
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Influence of spacing between buildings on wind characteristics above rural and suburban areas

  • Kozmar, Hrvoje (Faculty of Mechanical Engineering and Naval Architecture, University of Zagreb, Department of Civil Engineering and Geological Sciences, University of Notre Dame)
  • 투고 : 2007.12.06
  • 심사 : 2008.08.08
  • 발행 : 2008.10.25
⟨ 이전 논문 다음 논문 ⟩

초록

A wind tunnel study has been carried out to determine the influence of spacing between buildings on wind characteristics above rural and suburban type of terrain. Experiments were performed for two types of buildings, three-floor family houses and five-floor apartment buildings. The atmospheric boundary layer (ABL) models were generated by means of the Counihan method using a castellated barrier wall, vortex generators and a fetch of roughness elements. A hot wire anemometry system was applied for measurement of mean velocity and velocity fluctuations. The mean velocity profiles are in good agreement with the power law for exponent values from ${\alpha}=0.15$ to ${\alpha}=0.24$, which is acceptable for the representation of the rural and suburban ABL, respectively. Effects of the spacing density among buildings on wind characteristics range from the ground up to $0.6{\delta}$. As the spacing becomes smaller, the mean flow is slowed down, whilst, simultaneously, the turbulence intensity and absolute values of the Reynolds stress increase due to the increased friction between the surface and the air flow. This results in a higher ventilation efficiency as the increased retardation of horizontal flow simultaneously accompanies an intensified vertical transfer of momentum.

키워드

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피인용 문헌

  1. Improved Experimental Simulation of Wind Characteristics around Tall Buildings vol.25, pp.4, 2012, https://doi.org/10.1061/(ASCE)AS.1943-5525.0000167
  2. Physical modeling of complex airflows developing above rural terrains vol.12, pp.3, 2012, https://doi.org/10.1007/s10652-011-9224-1
  3. Computational modeling of the atmospheric boundary layer using various two-equation turbulence models vol.19, pp.6, 2014, https://doi.org/10.12989/was.2014.19.6.687
  4. Flow and Turbulence Control in a Boundary Layer Wind Tunnel Using Passive Hardware Devices vol.41, pp.6, 2017, https://doi.org/10.1007/s40799-017-0196-z
  5. An alternative approach to experimental simulation of wind characteristics in urban environments vol.4, 2011, https://doi.org/10.1016/j.proenv.2011.03.006
  6. Truncated vortex generators for part-depth wind-tunnel simulations of the atmospheric boundary layer flow vol.99, pp.2-3, 2011, https://doi.org/10.1016/j.jweia.2010.11.001
  7. Designing laboratory wind simulations using artificial neural networks vol.120, pp.3-4, 2015, https://doi.org/10.1007/s00704-014-1201-4
  8. Steady RANS model of the homogeneous atmospheric boundary layer vol.173, 2018, https://doi.org/10.1016/j.jweia.2017.12.006
  9. Scale effects in wind tunnel modeling of an urban atmospheric boundary layer vol.100, pp.1-2, 2010, https://doi.org/10.1007/s00704-009-0156-3
  10. Characteristics of natural wind simulations in the TUM boundary layer wind tunnel vol.106, pp.1-2, 2011, https://doi.org/10.1007/s00704-011-0417-9
  11. Wind-tunnel simulations of the suburban ABL and comparison with international standards vol.14, pp.1, 2008, https://doi.org/10.12989/was.2011.14.1.015