Maximum Smoke Temperature in Non-Smoke Model Evacuation Region for Semi-Transverse Tunnel Fire
Publish place: Journal of Applied Fluid Mechanics، Vol: 10، Issue: 4
Publish Year: 1396
نوع سند: مقاله ژورنالی
زبان: English
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شناسه ملی سند علمی:
JR_JAFM-10-4_012
تاریخ نمایه سازی: 3 بهمن 1400
Abstract:
Smoke temperature distribution in non-smoke evacuation under different mechanical smoke exhaust rates of semi-transverse tunnel fire were studied by FDS numerical simulation in this paper. The effect of fire heat release rate (۱۰MW ۲۰MW and ۳۰MW) and exhaust rate (from ۰ to ۱۶۰m۳/s) on the maximum smoke temperature in non-smoke evacuation region was discussed. Results show that the maximum smoke temperature in non-smoke evacuation region decreased with smoke exhaust rate. Plug-holing was observed below the smoke vent when smoke exhaust rate increased to a certain value. Smoke spreading distance can be divided into three stages according to changes of smoke exhaust rate. The maximum smoke temperature model concluded that the peak temperature rise at tunnel vault is proportional to ۰.۷۵ power of dimensionless fire power. The maximum temperature in non-smoke evacuation region decays exponentially with the increase of smoke exhaust rate. However smoke vent interval influences the dimensionless maximum temperature in non-smoke evacuation region slightly. Smoke vent interval influences the dimensionless maximum temperature in non-smoke evacuation region slightly.
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Authors
B. Lou
School of Electric Power, South China University of Technology, Guangzhou, Guangdong Province, ۵۱۰۶۴۰, China
Y. Qiu
School of Electric Power, South China University of Technology, Guangzhou, Guangdong Province, ۵۱۰۶۴۰, China
X. Long
School of Chemistry and Chemical Engineering South China University of Technology, Guangzhou, Guangdong Province, ۵۱۰۶۴, China