Experimental and numerical study of OH* chemiluminescence in hydrogen diffusion flames
Article
Article Title | Experimental and numerical study of OH* chemiluminescence in hydrogen diffusion flames |
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ERA Journal ID | 3869 |
Article Category | Article |
Authors | Zhao, Mengmeng (Author), Buttsworth, David (Author) and Choudhury, Rishabh (Author) |
Journal Title | Combustion and Flame |
Journal Citation | 197, pp. 369-377 |
Number of Pages | 9 |
Year | 2018 |
Place of Publication | United States |
ISSN | 0010-2180 |
1556-2921 | |
Digital Object Identifier (DOI) | https://doi.org/10.1016/j.combustflame.2018.08.019 |
Web Address (URL) | https://linkinghub.elsevier.com/retrieve/pii/S0010218018303845 |
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. |
Keywords | aAbel transformation; chemiluminescence; hydrogen combustion |
ANZSRC Field of Research 2020 | 401703. Energy generation, conversion and storage (excl. chemical and electrical) |
Public Notes | Files associated with this item cannot be displayed due to copyright restrictions. |
Byline Affiliations | School of Mechanical and Electrical Engineering |
Institution of Origin | University of Southern Queensland |
Funding source | Australian Research Council (ARC) Grant ID LE160100194 |
https://research.usq.edu.au/item/q4xvv/experimental-and-numerical-study-of-oh-chemiluminescence-in-hydrogen-diffusion-flames
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