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A comparative study of different burning time models for the combustion of aluminum dust particles

Bidabadi, Mehdi; Poorfar, Alireza Khoeini; Wang, Shaobin and Sundén, Bengt LU (2015) In Applied Thermal Engineering 105. p.474-482
Abstract

In the present paper combustion of micron-sized aluminum dust cloud has been studied in a quiescent reaction medium with spatially discrete sources. A new thermal model is generated to estimate the flame front speed in a lean reaction environment in different oxidizer concentrations. Different burning time models for aluminum are utilized in the generated thermal model to compare their applicability by using the existing experimental data. The model is based on conduction and radiative heat transfer mechanisms using the heat point source method. The combustion of single-particle was first studied and the solution is presented. Then the dust combustion was investigated using the superposition principle to include the effects of... (More)

In the present paper combustion of micron-sized aluminum dust cloud has been studied in a quiescent reaction medium with spatially discrete sources. A new thermal model is generated to estimate the flame front speed in a lean reaction environment in different oxidizer concentrations. Different burning time models for aluminum are utilized in the generated thermal model to compare their applicability by using the existing experimental data. The model is based on conduction and radiative heat transfer mechanisms using the heat point source method. The combustion of single-particle was first studied and the solution is presented. Then the dust combustion was investigated using the superposition principle to include the effects of inter-particles. The flame propagation speed as a function of aluminum dust concentration for various particle diameters is studied and the effects of radiation heat transfer are taken into account in the governing equations. In addition, flame speed in different types of oxidizers such as air, carbon dioxide, and water vapor is investigated and nitrogen is considered as the inert gas. A reasonable agreement between the results of the numerical solution of combustion of an aluminum dust cloud and the experimental data was obtained in terms of flame propagation speed. It is found that the value of flame speed of combustion of aluminum dust particles in carbon dioxide reaction medium in a considered dust concentration and particle size, is the lowest compared to the other oxidizers.

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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Aluminum, Burning time models, Flame propagation speed, Heterogeneous combustion, Metals ignition
in
Applied Thermal Engineering
volume
105
pages
474 - 482
publisher
Elsevier
external identifiers
  • Scopus:84961912081
ISSN
1359-4311
DOI
10.1016/j.applthermaleng.2016.03.022
language
English
LU publication?
yes
id
6a22164b-a75f-4b71-8b87-b69f1962acb8
date added to LUP
2016-09-23 12:00:41
date last changed
2017-01-01 08:34:59
@article{6a22164b-a75f-4b71-8b87-b69f1962acb8,
  abstract     = {<p>In the present paper combustion of micron-sized aluminum dust cloud has been studied in a quiescent reaction medium with spatially discrete sources. A new thermal model is generated to estimate the flame front speed in a lean reaction environment in different oxidizer concentrations. Different burning time models for aluminum are utilized in the generated thermal model to compare their applicability by using the existing experimental data. The model is based on conduction and radiative heat transfer mechanisms using the heat point source method. The combustion of single-particle was first studied and the solution is presented. Then the dust combustion was investigated using the superposition principle to include the effects of inter-particles. The flame propagation speed as a function of aluminum dust concentration for various particle diameters is studied and the effects of radiation heat transfer are taken into account in the governing equations. In addition, flame speed in different types of oxidizers such as air, carbon dioxide, and water vapor is investigated and nitrogen is considered as the inert gas. A reasonable agreement between the results of the numerical solution of combustion of an aluminum dust cloud and the experimental data was obtained in terms of flame propagation speed. It is found that the value of flame speed of combustion of aluminum dust particles in carbon dioxide reaction medium in a considered dust concentration and particle size, is the lowest compared to the other oxidizers.</p>},
  author       = {Bidabadi, Mehdi and Poorfar, Alireza Khoeini and Wang, Shaobin and Sundén, Bengt},
  issn         = {1359-4311},
  keyword      = {Aluminum,Burning time models,Flame propagation speed,Heterogeneous combustion,Metals ignition},
  language     = {eng},
  month        = {05},
  pages        = {474--482},
  publisher    = {Elsevier},
  series       = {Applied Thermal Engineering},
  title        = {A comparative study of different burning time models for the combustion of aluminum dust particles},
  url          = {http://dx.doi.org/10.1016/j.applthermaleng.2016.03.022},
  volume       = {105},
  year         = {2015},
}