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Spectral characteristics of a premixed oxy-methane flame in atmospheric conditions

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  • Oh, Jeongseog

Abstract

The characteristics of light emission of a premixed oxy-methane flame were experimentally investigated in atmospheric conditions (T∞ = 24 °C and P∞ = 1.01325 bar). The objectives of the current study are to investigate the flame luminescence and flame spectra of a premixed oxy-methane flame in a cylindrical tube burner and to derive an empirical formula describing the relationship between chemiluminescence intensity ratio, fuel flow rate, global equivalence ratio, and diluent mole fraction. The mixture velocity at nozzle exit (uo) was varied in uo = (15–35) m/s and the global equivalence ratio (ϕG) was changed from 0.4 to 2.0 with a cylindrical tube burner of do = 2.03 mm. A spectrometer and ICCD (intensified charge-coupled device) camera were used to detect flame chemiluminescence with narrow band-pass filters and lenses. The light emission of a laminar premixed oxy-methane flame was more dominant at λ = 308 nm than at other wavelengths from the measurement of spectral intensity. The intensity of OH* and CH* increased with an increase in mass flow rate of fuel (mF), adiabatic flame temperature (TAd), and equivalence ratio (ϕG) in ϕG = 0.5–1.1. The intensity ratio of OH*/CH* was expressed as a function of the fuel flow rate, equivalence ratio, and diluent mole fraction (XD).

Suggested Citation

  • Oh, Jeongseog, 2016. "Spectral characteristics of a premixed oxy-methane flame in atmospheric conditions," Energy, Elsevier, vol. 116(P1), pages 986-997.
    • Handle: RePEc:eee:energy:v:116:y:2016:i:p1:p:986-997
    DOI: 10.1016/j.energy.2016.10.006
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    References listed on IDEAS

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    1. Chui, E.H. & Majeski, A.J. & Douglas, M.A. & Tan, Y. & Thambimuthu, K.V., 2004. "Numerical investigation of oxy-coal combustion to evaluate burner and combustor design concepts," Energy, Elsevier, vol. 29(9), pages 1285-1296.
    2. Oh, Jeongseog & Noh, Dongsoon, 2012. "Laminar burning velocity of oxy-methane flames in atmospheric condition," Energy, Elsevier, vol. 45(1), pages 669-675.
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    3. González Álvarez, José Francisco & Gonzalo de Grado, Jesús, 2019. "Study of combustion in CO2-Capturing semi-closed Brayton cycle conditions," Energy, Elsevier, vol. 166(C), pages 1276-1290.

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