Experimental and numerical study of OH* chemiluminescence in hydrogen diffusion flames

Zhao, Mengmeng and Buttsworth, David and Choudhury, Rishabh (2018) Experimental and numerical study of OH* chemiluminescence in hydrogen diffusion flames. Combustion and Flame, 197. pp. 369-377. ISSN 0010-2180

Abstract

A co-flow burner was designed to generate axisymmetric diffusion flames for the application of line-of- sight optical diagnostics to hydrogen flames. Chemiluminescence images of OH∗ from laminar hydrogen diffusion flames, with and without co-flowing air, were recorded using an intensified camera system with a narrow-band filter at approximately 310 nm. The spectra of OH∗ chemiluminescence was acquired by a separate optical system. Local concentrations of the radiating radical OH∗ were determined using the inverse Abel transformation and calibration against a light source of known radiance. The uncertainty of the OH∗ concentration measurements is analysed to be −22% to +12% in the current experimental configuration. Numerical reconstruction of the physical flames was performed using a two dimensional axisymmetric flow model coupled with a detailed H 2 /O 2 oxidation chemistry mechanism and an OH∗ chemiluminescent sub-scheme which includes options to use 6 different rate coefficients recommended in the literature for the OH∗ formation reaction H + O + M �OH∗ + M (R1). The numerical simulations using the rate coefficient of 1.5 ×10 13 exp (−5 . 98 kcal mol −1 / RT) cm 6 mol −2 s −1 for R1 demonstrate the best agreement with the measured OH∗ chemiluminescence.


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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: Permanent restricted access to Published version, in accordance with the copyright policy of the publisher.
Faculty/School / Institute/Centre: Current - Faculty of Health, Engineering and Sciences - School of Mechanical and Electrical Engineering
Date Deposited: 05 Feb 2019 01:09
Last Modified: 05 Feb 2019 01:42
Uncontrolled Keywords: aAbel transformation; chemiluminescence; hydrogen combustion
Fields of Research : 09 Engineering > 0913 Mechanical Engineering > 091305 Energy Generation, Conversion and Storage Engineering
Socio-Economic Objective: E Expanding Knowledge > 97 Expanding Knowledge > 970109 Expanding Knowledge in Engineering
Funding Details:
Identification Number or DOI: 10.1016/j.combustflame.2018.08.019
URI: http://eprints.usq.edu.au/id/eprint/34824

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