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Research Papers

Electric Manipulation of Laminar Nonpremixed Counterflow Propane Flames

[+] Author and Article Information
Ahmad M. Y. AL-Naeemy

Department of Aerospace Engineering,
Khalifa University,
Abu Dhabi 127788, UAE
e-mail: 100035198@kustar.ac.ae

Abdul Rahman D. Farraj

Department of Mechanical Engineering,
Khalifa University,
Abu Dhabi 127788, UAE
e-mail: adul.farraj@kustar.ac.ae

Dimitrios C. Kyritsis

Professor
Department of Mechanical Engineering,
Khalifa University,
Abu Dhabi 127788, UAE
e-mail: dimitrios.kyritsis@kustar.ac.ae

Ashraf N. Al-Khateeb

Department of Aerospace Engineering,
Khalifa University,
Abu Dhabi 127788, UAE
e-mail: ashraf.alkhateeb@kustar.ac.ae

1Corresponding author.

Contributed by the Heat Transfer Division of ASME for publication in the JOURNAL OF THERMAL SCIENCE AND ENGINEERING APPLICATIONS. Manuscript received June 1, 2016; final manuscript received October 31, 2016; published online April 11, 2017. Assoc. Editor: Ziad Saghir.

J. Thermal Sci. Eng. Appl 9(3), 031013 (Apr 11, 2017) (6 pages) Paper No: TSEA-16-1160; doi: 10.1115/1.4035941 History: Received June 01, 2016; Revised October 31, 2016

The effect of the electric field on laminar nonpremixed counterflow propane flames was analyzed computationally. The computations were conducted using ANSYS fluent platform associated with a detailed kinetic mechanism. The mechanism was supplemented with a set of three reactions accounting for the consumption/production of three chemi-ions. It was established that the position of the flame could be only controlled through altering the intensity of the applied electric field. The effect of the applied electric field was included within the reactive flow equations via introducing two distinct terms: a body force term that accounts for the electric field effects on the momentum of the reactive mixture, and an extra diffusion term that accounts for the mobility charged species, namely ambipolar diffusion. This study clearly shows that electric force provides a potential for controlling the location of propane flames without affecting their structure.

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References

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Figures

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Fig. 1

Schematic diagram of the counterflow burner in which the computational domain is marked

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Fig. 2

The computational domain and the system's boundary conditions

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Fig. 3

Relative error in the calculation of the mass fraction of OH as a function of the discretization size

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Fig. 4

The mass fractions' profiles of CO2,OH,HCO, and O as a function of the location along the burner centerline (r=0)

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Fig. 5

The mass fractions' profiles of HCO,CH,H3O+,andHCO+ as a function of the location along the burner centerline (r=0)

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Fig. 6

The flame structure in terms of the mass fraction of OH as a function of the applied voltage

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Fig. 7

The mass fractions' profiles of H3O+ and OH at the burner centerline (r=0) when no electric field is applied (dotted lines) and when an electric field is applied (solid lines)

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Fig. 8

The mass fraction profile of H3O+ as a function of the applied voltage along the burner centerline (r=0)

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Fig. 9

The temperature profile as a function of the applied voltage along the burner centerline (r=0)

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