Fire Science and Engineering (한국화재소방학회논문지)

Korean Institute of Fire Science and Engineering (한국화재소방학회)
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The Influence of Wind Conditions on the Performance of Smoke Ventilation in High-rise Building Fires

초고층건물 화재시 외기바람이 배연성능에 미치는 영향

  • Kim, Beom-Gyu (Dept. of Fire Protection and Disaster Prevention, Hoseo Univ.) ;
  • Yim, Chae-Hyun (Dept. of Fire Protection and Disaster Prevention, Jeju international Univ.) ;
  • Park, Yong-Hwan (Dept. of Fire Protection and Disaster Prevention, Hoseo Univ.)
  • 김범규 (호서대학교 소방방재학과) ;
  • 임채현 (제주국제대학교 소방방재학과) ;
  • 박용환 (호서대학교 소방방재학과)
  • Received : 2016.01.13
  • Accepted : 2016.02.22
  • Published : 2016.02.29
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Abstract

This study examined the effects of the wind conditions, such as wind velocity and wind directions, on the performance of the mechanical smoke exhaust systems for high-rise building fires. A scaled model design and CFD simulations were used to verify the effects both quantitatively and qualitatively. The results showed that the smoke exhaust velocity of the mechanical exhaust system can be reduced by up to 17% at a wind velocity of 5 m/s (equivalent to an outdoor wind speed of 16 m/s) and a wind direction of ${\theta}=5^{\circ}$. In addition, the angle of the outdoor wind direction below ${\theta}=25^{\circ}$ had a significantly influence on the smoke exhaust flow rate and reduced exhaust performance of the smoke exhaust system in a fire.

본 논문은 초고층건물 화재 시 외기바람의 풍속, 풍향 조건이 기계배연시스템의 배연성능에 미치는 영향을 분석하였으며, 차원해석을 통한 축소모델 설계와 CFD 수치해석을 이용하여 영향을 정량적으로 평가하였다. 해석 결과, 축소모델의 외기풍속 5 m/s(실 외기풍속은 약 16 m/s), 풍향 ${\theta}=5^{\circ}$의 조건의 경우 배연풍속이 최대 약 17% 감소함을 보였으며, 외기풍향 각도 ${\theta}=25^{\circ}$ 이하의 조건에서는 기계배연시스템의 배출풍량을 크게 감소시켜 화재시 배연성능이 저하될 수 있는 것으로 평가되었다.

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References

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