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Research Papers: Fuel Combustion

Laser-Induced Plasma Spectrometry With Chemical Seeding and Application to Flow Mixing Analysis in Methane–Air Flames

[+] Author and Article Information
Hirotoshi Taki

Department of Applied Chemistry,
Graduate School of Engineering,
Nagoya University,
Chikusa-ku,
Nagoya 464-8603, Japan
e-mail: waterfall.wide.city@hotmail.com

Hiroshi Asai

Department of Applied Chemistry,
Graduate School of Engineering,
Nagoya University,
Chikusa-ku,
Nagoya 464-8603, Japan
e-mail: hisroshi@asai.tec.toyota.co.jp

Kuniyuki Kitagawa

EcoTopia Science Institute,
Nagoya University,
Furo-Cho, Chikusa-ku,
Nagoya 464-8603, Japan
e-mail: a41596a@yahoo.co.jp

Hiroyuki Oyama

Advanced Industrial Science
and Technology (AIST),
2-17-2-1, Tsukisamu-Higashi,
Toyohira-ku,
Sapporo 062-0051, Japan
e-mail: h.oyama@aist.go.jp

Ashwani K. Gupta

Department of Mechanical Engineering,
University of Maryland,
College Park, MD 20742
e-mail: akgupta@umd.edu

1Corresponding author.

Contributed by the Advanced Energy Systems Division of ASME for publication in the JOURNAL OF ENERGY RESOURCES TECHNOLOGY. Manuscript received May 28, 2014; final manuscript received July 5, 2014; published online July 29, 2014. Editor: Hameed Metghalchi.

J. Energy Resour. Technol 137(1), 012202 (Jul 29, 2014) (5 pages) Paper No: JERT-14-1165; doi: 10.1115/1.4027980 History: Received May 28, 2014; Revised July 05, 2014

Spectroscopic measurements of flames are amongst the most important analytical diagnostic techniques that allow one to improve thermal and energy efficiency of industrial furnaces. A chemical seeding laser-induced plasma spectroscopy (CS-LIPS) was successfully developed and applied for mixing analysis of a methane–air diffusion flame. The results obtained showed that sensitivity of this system was much improved using silica rod as the target material in place of the tungsten material used in our previous studies. Profiling of Mg spectral emission and mixing in the flame was made more clearly with the introduction of magnesium aerosols as a tracer into the combustion air flow.

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Figures

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Fig. 1

Typical spectra of laser induced plasma in flame with different targets, (a) Al2O3 and (b) SiO2

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Fig. 2

Atomic emission spectrum in a methane–air diffusion flame with Mg solution using LIPS (at x = 0 mm and z = 15 mm)

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Fig. 3

The Boltzmann plot of Si emission lines

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Fig. 4

Profiles of atomic emission intensity

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Fig. 5

Profiles of emission intensity ratio (normalized by the magnesium intensity)

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