Numerical and Experimental Study on Laminar Methane/Air Premixed Flames at Varying Pressure
(2017) In Energy Procedia 105. p.4970-4975- Abstract
Laminar methane/air premixed Bunsen flames were studied using detailed numerical simulations and laser diagnostics. In the numerical simulations one-dimensional and two-dimensional configurations were considered with detailed transport properties and chemical kinetic mechanism. In the measurements OH PLIF was employed. The flame structures vary with varying equivalence ratio and pressure. For stoichiometric mixture at atmospheric pressure the flame exhibits a single reaction zone structure, while at high-pressures the flame exhibits a two-reaction zone structure: an inner premixed flame and an outer diffusion flame. The predicted two-zone structure is confirmed in the OH PLIF measurements. Using the numerical and the experimental data... (More)
Laminar methane/air premixed Bunsen flames were studied using detailed numerical simulations and laser diagnostics. In the numerical simulations one-dimensional and two-dimensional configurations were considered with detailed transport properties and chemical kinetic mechanism. In the measurements OH PLIF was employed. The flame structures vary with varying equivalence ratio and pressure. For stoichiometric mixture at atmospheric pressure the flame exhibits a single reaction zone structure, while at high-pressures the flame exhibits a two-reaction zone structure: an inner premixed flame and an outer diffusion flame. The predicted two-zone structure is confirmed in the OH PLIF measurements. Using the numerical and the experimental data the methods of flame-cone-angle and flame-area have been used to extract the laminar flame speed for different equivalence ratios and pressures. It is found that although the flame cone angle method is widely used, it yields a lower accuracy than that of the flame surface area method. The inlet velocity of the burner is shown to affect the accuracy of extracted laminar flame speed. It is suggested that the most suitable inlet velocity of methane-air mixture is about 6 times the laminar flame speed.
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- author
- Hu, Siyuan LU ; Gao, Jinlong LU ; Zhou, Yajun ; Gong, Cheng LU ; Bai, Xue Song LU ; Li, Zhongshan LU and Alden, Marcus LU
- organization
- publishing date
- 2017
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- flame structures, high pressure, laminar flame speed, methane/air
- in
- Energy Procedia
- volume
- 105
- pages
- 6 pages
- publisher
- Elsevier
- external identifiers
-
- wos:000404967905013
- scopus:85020693368
- ISSN
- 1876-6102
- DOI
- 10.1016/j.egypro.2017.03.993
- language
- English
- LU publication?
- yes
- id
- c5d039c6-2963-459c-b3e8-eabd794f797e
- date added to LUP
- 2017-07-04 14:27:24
- date last changed
- 2024-02-29 17:55:39
@article{c5d039c6-2963-459c-b3e8-eabd794f797e,
abstract = {{<p>Laminar methane/air premixed Bunsen flames were studied using detailed numerical simulations and laser diagnostics. In the numerical simulations one-dimensional and two-dimensional configurations were considered with detailed transport properties and chemical kinetic mechanism. In the measurements OH PLIF was employed. The flame structures vary with varying equivalence ratio and pressure. For stoichiometric mixture at atmospheric pressure the flame exhibits a single reaction zone structure, while at high-pressures the flame exhibits a two-reaction zone structure: an inner premixed flame and an outer diffusion flame. The predicted two-zone structure is confirmed in the OH PLIF measurements. Using the numerical and the experimental data the methods of flame-cone-angle and flame-area have been used to extract the laminar flame speed for different equivalence ratios and pressures. It is found that although the flame cone angle method is widely used, it yields a lower accuracy than that of the flame surface area method. The inlet velocity of the burner is shown to affect the accuracy of extracted laminar flame speed. It is suggested that the most suitable inlet velocity of methane-air mixture is about 6 times the laminar flame speed.</p>}},
author = {{Hu, Siyuan and Gao, Jinlong and Zhou, Yajun and Gong, Cheng and Bai, Xue Song and Li, Zhongshan and Alden, Marcus}},
issn = {{1876-6102}},
keywords = {{flame structures; high pressure; laminar flame speed; methane/air}},
language = {{eng}},
pages = {{4970--4975}},
publisher = {{Elsevier}},
series = {{Energy Procedia}},
title = {{Numerical and Experimental Study on Laminar Methane/Air Premixed Flames at Varying Pressure}},
url = {{http://dx.doi.org/10.1016/j.egypro.2017.03.993}},
doi = {{10.1016/j.egypro.2017.03.993}},
volume = {{105}},
year = {{2017}},
}