Numerical Investigation on the Asymmetric Flow Characteristics of Two Propane Fires of Unequal Heat Release Rate in Open Space

2021 ◽  
Author(s):  
Zheng Wang ◽  
Longxing Yu ◽  
Jie Ji
Keyword(s):  
Heat Release ◽  
Numerical Investigation ◽  
Heat Release Rate ◽  
Release Rate ◽  
Open Space ◽  
Flow Characteristics ◽  
Asymmetric Flow

An improved model for estimating heat release rate in horizontal cable tray fires in open space

2018 ◽  
Vol 36 (3) ◽  
pp. 275-290 ◽  
Author(s):  
Xianjia Huang ◽  
He Zhu ◽  
Lan Peng ◽  
Zihui Zheng ◽  
Wuyong Zeng ◽  
...  
Keyword(s):  
Heat Release ◽  
Heat Release Rate ◽  
Release Rate ◽  
Large Scale ◽  
Open Space ◽  
Local Error ◽  
Bench Scale ◽  
Improved Model ◽  
Cable Fire ◽  
Fire Experiments

Electric cable fires in nuclear power plants could be disastrous and have to be studied carefully for safety and economic considerations. Based on the results of previous work on large-scale and bench-scale cable fire testing, the Flame Spread over Horizontal Cable Trays model was modified and improved to estimate the heat release rate of large-scale cable fires using bench-scale measured data. The heat release rate per unit area measured in the cone calorimeter experiment is taken as the input, to avoid introducing any prediction uncertainties caused by inconsistent values of the heat of combustion and char yield of the cable. Cable fire experiments with vertical stacks of trays with one to three layers of cables were conducted in open space to assess the accuracy of the improved model. In comparing with the experimental results, predictions using the improved model are encouraging. The local error of prediction is less than 15% and the global error lies between 19.2% and 35.7%. In addition, three cable tray fire experiments with data available in the literature were used to validate the improved model. It is shown that the improved model had good predictions for these cable tray fires.

Study on Heat Release Rate Model in Steel Bridge Highway Fire

2012 ◽  
Vol 170-173 ◽  
pp. 2535-2540 ◽  
Author(s):  
Li Jun Li ◽  
Zhao Tong Hu ◽  
Qiang Liu
Keyword(s):  
Heat Release ◽  
Heat Release Rate ◽  
Release Rate ◽  
Open Space ◽  
Rapid Development ◽  
Steel Structure ◽  
Simulation Software ◽  
Maximum Temperature ◽  
Steel Bridge ◽  
Main Research

With the rapid development of the highway industry, the steel structure as the main Long Span Bridge build more and more, the highways are carrying more and more traffic than before and vehicle fires are becoming more frequent. This paper, (which is based on previous literature on the behavior of fire, and the main research method of fire heat release-rate) proposes a mathematical model for the heat release-rate of highway fires. Using the fire numerical simulation software FDS to do an analysis of the temperature field of an open space formed by a 300 mw heat release-rate reveals that the maximum temperature decrease is non-linear when the height increase.

Scale Modeling on the Effect of Air Velocity on Heat Release Rate in Tunnel Fire

2008 ◽  
Vol 18 (2) ◽  
pp. 111-124 ◽  
Author(s):  
C. Chen ◽  
L. Qu ◽  
Y. X. Yang ◽  
G. Q. Kang ◽  
W. K. Chow
Keyword(s):  
Heat Release ◽  
Heat Release Rate ◽  
Release Rate ◽  
Air Velocity ◽  
Tunnel Fire ◽  
Scale Modeling
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