主管:中华人民共和国应急管理部
主办:应急管理部天津消防研究所
ISSN 1009-0029  CN 12-1311/TU

Fire Science and Technology ›› 2021, Vol. 40 ›› Issue (7): 977-982.

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Study on optimization of ventilation efficiency about jet fan in curved tunnel

CHEN Yan1, WANG Tian-xiong2, TAO Hao-wen2, XU Zhi-sheng2   

  1. 1. Nanjing Public Engineering Construction Center, Jiangsu Nanjing 210004, China; 2. School of Civil Engineering, Central South University, Hunan Changsha 410075, China
  • Online:2021-07-15 Published:2021-07-15

Abstract: Based on the underground interchange project of Jianning West Road, CFD software was used to simulate the horizontal spacing and arrangement position of the jet fans in the curved tunnel, the deflection angle of the fans, the longitudinal spacing, then the flow field distribution and jet fans booster capacity under different cases were analyzed. The results showed that in a curved tunnel, when the lateral spacing of the jet fan is twice the diameter of the fan, and it is close to the convex surface of the tunnel and deflected by 5° to 10° toward the concave area, the downstream flow field distribution of the fan is relatively uniform, and the tunnel ventilation effect is good. The longitudinal spacing of jet fans should not be greater than 100 m.

Key words: curve tunnel, longitudinal ventilation, reduction factor, deflection angle, numerical simulation