Measurements of temperature and concentration of nitrogen monoxide in flames by LIF imaging spectroscopy with standard addition method

Kazuya Okuno, Takaya Sano, Hiroyasu Saitoh, Norihiko Yoshikawa, Shigeru Hayashi

研究成果: Article査読

1 被引用数 (Scopus)

抄録

An NO-LIF imaging spectroscopy of A2+ → X2∏ (0, 0) excitation (225-226 nm) and A2+ → X2∏ (0,2) emission (246-248 nm) was applied to methane-air flames with equivalence ratio of 0.8, 1.0, 1.2, and a methane diffusion flame for measuring mole fractions of nitrogen monoxide (NO) and temperature. The mole fractions were determined comparing the NO-LIF intensities of non NO-seeded and NO-seeded cases. Temperatures in flames were also obtained using two-line method. Nitrogen monoxide was doped in both burner nozzle flow and surrounding air co-flow to enable two-dimensional measurements of mole fraction in the flames. The results of NO mole fraction images which should be closely correlated to the obtained temperature distributions showed good agreement with the well known NO formation mechanisms. Narrow-band filters for removing non-resonant lights were not enough to remove the strong Mie scattering of laser light by soot in the diffusion flame. Introduction of an imaging spectrometer provided high signal-to-noise ratio of NO-LIF imaging. The NO-LIF acquisition technique for the diffusion flame also revealed that NO A 2+ ← X2 ∏ (0, 0) excitation was a good choice to capture strong NO-LIF while avoiding nonresonant lights such as LIF of soot precursors and Laser Induced Incandescence (LII) of soot.

本文言語English
ページ(範囲)2733-2740
ページ数8
ジャーナルNihon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B
72
11
DOI
出版ステータスPublished - 2006 11
外部発表はい

ASJC Scopus subject areas

  • 凝縮系物理学
  • 機械工学

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