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Research Papers: Gas Turbines: Combustion, Fuels, and Emissions

Chemiluminescence Studies of Coke Oven Gas/O2 Coflow Normal/Inverse Diffusion Flames

[+] Author and Article Information
Xudong Song, Yan Gong, Qinghua Guo, Zhenghua Dai

Key Laboratory of Coal Gasification and Energy
Chemical Engineering of Ministry of Education,
Shanghai Engineering Research Center of Coal Gasification,
East China University of Science and Technology,
Shanghai 200237, China

Guangsuo Yu

Key Laboratory of Coal Gasification and Energy
Chemical Engineering of Ministry of Education,
Shanghai Engineering Research Center of Coal Gasification,
East China University of Science and Technology,
Shanghai 200237, China
e-mail: gsyu@ecust.edu.cn

1Corresponding author.

Contributed by the Combustion and Fuels Committee of ASME for publication in the JOURNAL OF ENGINEERING FOR GAS TURBINES AND POWER. Manuscript received June 13, 2014; final manuscript received January 3, 2015; published online February 10, 2015. Assoc. Editor: Kalyan Annamalai.

J. Eng. Gas Turbines Power 137(8), 081505 (Aug 01, 2015) (10 pages) Paper No: GTP-14-1284; doi: 10.1115/1.4029623 History: Received June 13, 2014; Revised January 03, 2015; Online February 10, 2015

In order to analyze the difference between the inverse diffusion flame (IDF) and normal diffusion flame (NDF) under various conditions, the emission spectra of OH* and CH* chemiluminescence in two dimensions measured by hyperspectral and ultraviolet (UV) cameras are described in this article. The results show that CH* mainly appears in the fuel side near the flame front, while OH* distribution can reflect the reaction region of flame. According to the OH* radial distributions in IDF and NDF, the flame can be divided into three parts: the core area of the flame, the transition region of the flame, and the developed region of flame. The peak intensity of CH* in IDF is higher than that in NDF. Moreover, the length of reaction region in NDF increases with O/C equivalence ratio ([O/C]e) until it reaches a steady value, while in IDF the length decreased with the increase of [O/C]e.

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Figures

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Fig. 1

The schematic diagram of the spectroscopic diagnostic system for jet diffusion flame

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Fig. 2

OH* distribution of NDF for condition 11 ((a) OH* 2D profile and (b) OH* radial distribution)

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Fig. 3

Comparison of OH* two-dimensional distribution of NDF with different [O/C]e

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Fig. 4

OH* distribution of IDF for condition 11 ((a) OH* 2D profile and (b) OH* radial distribution)

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Fig. 5

Comparison of OH* two-dimensional distribution of IDF with different [O/C]e

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Fig. 6

The change of OH* maximum emission intensity with [O/C]e for different conditions

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Fig. 7

CH* distribution of NDF for condition 11 ((a) CH* 2D profile and (b) CH* radial distribution)

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Fig. 8

Comparison of CH* and OH* radial distributions of NDF for condition 11

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Fig. 9

CH* distribution of IDF for condition 11 ((a) CH* 2D profile and (b) CH* radial distribution)

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Fig. 10

Comparison of CH* two-dimensional distribution of NDF (a, b, c) and IDF (d, e, f) with different [O/C]e

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Fig. 11

The dimension of different part of flame at different conditions ((I) vCOG = 0.5 L/min NDF, (II) vCOG = 1.0 L/min NDF, (III) vCOG = 1.5 L/min NDF, (IV) vCOG = 0.5 L/min IDF, (V) vCOG = 1.0 L/min IDF, and (VI) vCOG = 1.5 L/min IDF) ((a) the whole reaction region of the flame; (b) the care area of flame; and (c) the full development region of flame)

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