Autoignition of solid combustibles subjected to a uniform incident heat flux: The effect of distance from the radiation source

2011 ◽  
Vol 158 (5) ◽  
pp. 1015-1017 ◽  
Author(s):  
Yang Lizhong ◽  
Zhou Yupeng ◽  
Wang Yafei ◽  
Dai Jiakun ◽  
Deng Zhihua ◽  
...  
Keyword(s):  
Heat Flux ◽  
Radiation Source ◽  
Incident Heat Flux

An Inverse Determination of Unsteady Heat Fluxes Using a Network Simulation Method

2003 ◽  
Vol 125 (6) ◽  
pp. 1178-1183 ◽  
Author(s):  
F. Alhama ◽  
J. Zueco and ◽  
C. F. Gonza´lez Ferna´ndez
Keyword(s):  
Heat Flux ◽  
Inverse Problem ◽  
Heat Conduction ◽  
Input Data ◽  
Heat Conduction Problem ◽  
Network Simulation ◽  
Simulation Method ◽  
Heat Fluxes ◽  
Incident Heat Flux ◽  
Network Simulation Method

This work addresses unsteady heat conduction in a plane wall subjected to a time-variable incident heat flux. Three different types of flux are studied (sinusoidal, triangular and step waveforms) and constant thermal properties are assumed for simplicity. First, the direct heat conduction problem is solved using the Network Simulation Method (NSM) and the collection of temperatures obtained at given instants is modified by introducing a random error. The resulting temperatures act as the input data for the inverse problem, which is also solved by a sequential approach using the NSM in a simple way. The solution is a continuous piece-wise function obtained step by step by minimizing the classical functional that compares the above input data with those obtained from the solution of the inverse problem. No prior information is used for the functional forms of the unknown heat flux. A piece-wise linear stretches of variable slope and length is used for each of the stretches of the solution. The sensitivity of the functional versus the slope of the line, at each step, is acceptable and the complete piece-wise solution is very close to the exact incident heat flux in all of the mentioned waveforms.

Attenuation of Incident Heat Flux by Pyrolysis Volatiles when Heated Using Resistance Element Radiant Heater

2009 ◽  
Vol 27 (5) ◽  
pp. 447-464 ◽  
Author(s):  
Yupeng Zhou ◽  
Lizhong Yang ◽  
Jiakun Dai ◽  
Yafei Wang ◽  
Zhihua Deng
Keyword(s):  
Heat Flux ◽  
Incident Heat Flux ◽  
Radiant Heater

A numerical study of a structure protected by water film from an incident heat flux

1990 ◽  
Vol 17 (3) ◽  
pp. 331-341 ◽  
Author(s):  
Wu-Shung Fu ◽  
Jenn-Der Lin ◽  
Kuan-Chywan Tu ◽  
Ching-Chyi Tseng
Keyword(s):  
Heat Flux ◽  
Numerical Study ◽  
Water Film ◽  
Incident Heat Flux
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