TY - JOUR
T1 - Thermal buoyant smoke back-layering length in a naturally ventilated tunnel with vertical shafts
AU - Wang, Yan Fu
AU - Yan, Pei Na
AU - Zhang, Biao
AU - Jiang, Jun Cheng
N1 - Publisher Copyright:
© 2015 Elsevier Ltd.
PY - 2016/1/25
Y1 - 2016/1/25
N2 - A series of full-scale experiments are carried out in tunnel with vertical shafts to research the effects of shaft on the smoke propagation in tunnel fires. Formulas for longitudinal propagation distance are fitted from experimental data using Origin software. Based on experimental data, Computational Fluid Dynamics model is built and validated. Thereafter, different scenarios are numerically studied using FLUENT software to simulate the effect of shaft on back-layering length. At last, a prediction formula for calculating back-layering length is deduced based on fire plume theory, dimensional analysis and the data from both experiments and simulations. In order to verify the validity of the proposed formula, the calculation results are compared with the experimental data. It shows that the proposed formulas agree well with the experimental data. So the proposed formulas can be used to predict the back-layering length of fire in tunnel with vertical shafts.
AB - A series of full-scale experiments are carried out in tunnel with vertical shafts to research the effects of shaft on the smoke propagation in tunnel fires. Formulas for longitudinal propagation distance are fitted from experimental data using Origin software. Based on experimental data, Computational Fluid Dynamics model is built and validated. Thereafter, different scenarios are numerically studied using FLUENT software to simulate the effect of shaft on back-layering length. At last, a prediction formula for calculating back-layering length is deduced based on fire plume theory, dimensional analysis and the data from both experiments and simulations. In order to verify the validity of the proposed formula, the calculation results are compared with the experimental data. It shows that the proposed formulas agree well with the experimental data. So the proposed formulas can be used to predict the back-layering length of fire in tunnel with vertical shafts.
KW - Back-layering length
KW - Computational fluid dynamics
KW - Dimensional analysis
KW - Full-scale fire experiments
KW - Tunnel with vertical shafts
UR - http://www.scopus.com/inward/record.url?scp=84947996184&partnerID=8YFLogxK
U2 - 10.1016/j.applthermaleng.2015.10.053
DO - 10.1016/j.applthermaleng.2015.10.053
M3 - 文章
AN - SCOPUS:84947996184
SN - 1359-4311
VL - 93
SP - 947
EP - 957
JO - Applied Thermal Engineering
JF - Applied Thermal Engineering
ER -