Analytical prediction of heat transfer and ignition time of solids exposed to time-dependent thermal radiation

Gong, J, Li, J, Li, C, Shi, L, Wang, X, Wang, S, Jiang, J and Wang, Z 2018, 'Analytical prediction of heat transfer and ignition time of solids exposed to time-dependent thermal radiation', International Journal of Thermal Sciences, vol. 130, pp. 227-239.


Document type: Journal Article
Collection: Journal Articles

Title Analytical prediction of heat transfer and ignition time of solids exposed to time-dependent thermal radiation
Author(s) Gong, J
Li, J
Li, C
Shi, L
Wang, X
Wang, S
Jiang, J
Wang, Z
Year 2018
Journal name International Journal of Thermal Sciences
Volume number 130
Start page 227
End page 239
Total pages 13
Publisher Elsevier Masson
Abstract An analytical model was developed in this study to predict the heat transfer and ignition time of solids subjected to time-dependent thermal radiation (HF=atb). Both surface and in-depth absorptions, corresponding to opaque and translucent materials, were considered in the model and critical temperature was employed. The predictions of the new model fit well with the experimental and numerical results. The results show that for surface absorption the ignition time to the power of -(b+0.5) is proportional to a, and the reciprocal of square root of ignition time is linearly correlated with ignition HF. Furthermore, a critical ignition HF was found to represent the lower limit of ignition HF range, which is different with the critical HF at constant HF. While for in-depth absorption, the ignition time to the power of -(b+1) and -1 were linearly proportional to a/(b+1) and ignition HF, respectively. For translucent solids, the analytical model cannot be applied to constant HF but can provide relatively high accuracy in predicting ignition time under variable HF. Also, the effect of in-depth absorption coefficient on ignition time were addressed, and it was found that this important parameter exerts its influence on ignition process following the similar mechanism with that of constant HF.
Subject Construction Materials
Keyword(s) Ignition temperature
Ignition time
In-depth absorption
Surface absorption
Time-dependent thermal radiation
DOI - identifier 10.1016/j.ijthermalsci.2018.04.015
Copyright notice © 2018 Elsevier Masson SAS. All rights reserved.
ISSN 1290-0729
Versions
Version Filter Type
Citation counts: TR Web of Science Citation Count  Cited 2 times in Thomson Reuters Web of Science Article | Citations
Scopus Citation Count Cited 0 times in Scopus Article
Altmetric details:
Access Statistics: 26 Abstract Views  -  Detailed Statistics
Created: Wed, 19 Sep 2018, 13:27:00 EST by Catalyst Administrator
© 2014 RMIT Research Repository • Powered by Fez SoftwareContact us