Prof. Peng Wang Profile

Prof. Peng Wang

at Southwest Jiaotong Univ

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Proceedings Article | 14 October 2021 Paper

Research on the Influence of slope and heat release rate on the critical velocity of straddle monorail tunnel

Jiehang Deng, Yanqiu Chen, Peng Wang

Proceedings Volume 11930, 1193018 (2021) https://doi.org/10.1117/12.2611345

KEYWORDS: Lithium, Temperature metrology, Medium wave, Safety, Glasses, Fluctuations and noise, Combustion, Thermal effects, Prototyping, HVAC controls

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Straddle monorail tunnel are mainly used in urban rail transit with the characteristics of larger structural section, larger slope, and higher heat release rate than subway tunnel. In order to study the influence of slope and heat release rate on smoke movement of critical velocity of longitudinal ventilation tunnel, different slope (-6%, -3%, 0%, 3%, 6%) and different heat release rate (5 MW, 10 MW, 20MW, 50MW) are studied in this paper based on the 1/20 straddle monorail tunnel model. The result shows that the slope of the tunnel and the heat release rate of fire are the main influencing factors. Firstly, compared with 0% critical velocity, the critical velocity of uphill air supply is greater and that of downhill air supply is smaller. Secondly the critical velocity of downhill air supply changes very little when the heat release rate and slope are large enough. Besides, critical velocity of the uphill air supply has a linear relationship with the slope, while that of the downhill air supply has an inverse proportional relationship with the slope. Finally, the critical velocity factor based on experimental data is proposed at the end of the paper.

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