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Research Papers: Fuel Combustion

A Mathematical Investigation of Premixed Lycopodium Dust Flame in a Small Furnace

[+] Author and Article Information
Hesam Moghadasi

School of Mechanical Engineering,
Department of Energy Conversion,
Iran University of Science and
Technology (IUST),
Narmak, Tehran 16846-13114, Iran
e-mail: hesam_moghadasi@mecheng.iust.ac.ir

Alireza Rahbari

Department of Mechanical Engineering,
Shahid Rajaee Teacher Training University
(SRTTU),
Tehran 1678815811, Iran;
Research School of Engineering,
The Australian National University,
Canberra, ACT 2601, Australia
e-mails: ar.rahbari@gmail.com;
alireza.rahbari@anu.edu.au

Mehdi Bidabadi

School of Mechanical Engineering,
Department of Energy Conversion,
Iran University of Science and
Technology (IUST),
Narmak, Tehran 16846-13114, Iran
e-mail: bidabadi@iust.ac.ir

Alireza Khoeini Poorfar

School of Mechanical Engineering,
Department of Energy Conversion,
Iran University of Science and
Technology (IUST),
Narmak, Tehran 16846-13114, Iran
e-mail: alirezapoorfar@alumni.iust.ac.ir

Vahid Farhangmehr

Department of Mechanical Engineering,
University of Bonab,
Bonab, 5551761167, Iran
email: farhangmehr.vahid@bonabu.ac.ir

1Corresponding author.

Contributed by the Advanced Energy Systems Division of ASME for publication in the JOURNAL OF ENERGY RESOURCES TECHNOLOGY. Manuscript received May 25, 2018; final manuscript received July 19, 2018; published online September 14, 2018. Assoc. Editor: Reza Sheikhi.

J. Energy Resour. Technol 141(3), 032201 (Sep 14, 2018) (6 pages) Paper No: JERT-18-1364; doi: 10.1115/1.4041106 History: Received May 25, 2018; Revised July 19, 2018

In the present study, a comprehensive mathematical method is developed to realize the flame expansion in the melting furnace zones. For this purpose, the furnace is composed of two zones: flame and post flame zones. Two different scenarios are covered in this research: Using lycopodium as a substitute fuel which is then converted to methane after the vaporization process, supplying the system with methane directly as a conventional fuel. The equations governing the problem with the required boundary conditions are developed and solved in each zone. The obtained results show great compatibility with the experimental findings in this research. Since lycopodium as the replacement fuel mostly contains volatile materials, one of the challenges in this study lies on understanding the effect of particle vaporization on the temperature distribution in a furnace. It is concluded that the average temperature in zones α1, α2, β1, and β2, is reduced by about 5 K, while it is increased by approximately the same amount in zones χ1, χ2, δ1, and δ2 after considering lycopodium as a fuel. Moreover, the role of vaporization and radiation on the combustion characteristics is studied in details. The achieved results from this analysis can be implemented in several industrial applications aiming for improving the energy efficiency outcome from their systems.

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References

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Figures

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Fig. 1

Three-dimensional furnace model division

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Fig. 2

Top and front view of fire and divisions

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Fig. 3

Side view of furnace division with labels

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Fig. 4

Comparison between numerical and experimental values of critical temperature at different locations of furnace

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Fig. 5

The effect of radiation percentage on the variation of temperature profile versus time

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Fig. 6

The effect of vaporization on the temperature distribution in zones α2 and δ1

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Fig. 7

Back profile temperatures during the melt cycle

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Fig. 8

Front profile temperatures during the melt cycle

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Fig. 9

Side profile temperatures near the flame during the melt cycle

Tables

Errata

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