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Near-field local flame extinction of oxy-syngas non-premixed jet flames: a DNS study

Near-field local flame extinction of oxy-syngas non-premixed jet flames: a DNS study
Near-field local flame extinction of oxy-syngas non-premixed jet flames: a DNS study
An investigation of the local flame extinction of H2/CO oxy-syngas and syngas-air nonpremixed jet flames was carried out using three-dimensional direct numerical simulations (DNS) with detailed chemistry by using flamelet generated manifold chemistry (FGM). The work has two main objectives: identify the influence of the Reynolds number on the oxy-syngas flame structure, and to clarify the local flame extinction of oxy-syngas and syngas-air flames at a higher Reynolds number.

Two oxy-syngas flames at Reynolds numbers 3000 and 6000 and one syngas-air flame at Reynolds number 6000 were simulated. The scattered data, probability density function distributions and fully burning probability provide the local flame characteristics of oxy-syngas and syngas-air nonpremixed jet flames. It is found that the H2/CO oxy-syngas flame burns well compared to the syngas-air flame and the high Reynolds number causes more flow straining, resulting in higher scalar dissipation rates which lead to lower temperatures and eventually local flame extinction. The oxy-syngas flames burns more vigorously than the syngas-air flame with the same adiabatic flame temperature of approximately 2400 K.
oxy-syngas flame, syngas-air flame, probability density functions, fully burning probability
189-196
Ranga Dinesh, K.K.J.
6454b22c-f505-40f9-8ad4-a1168e8f87cd
Van Oijen, J.A
57e7e907-4a20-4c77-be43-b3722516ea7f
Luo, K.H.
1c9be6c6-e956-4b12-af13-32ea855c69f3
Jiang, X.
008a11fa-f330-4355-b5c6-2878d1ab0f5c
Ranga Dinesh, K.K.J.
6454b22c-f505-40f9-8ad4-a1168e8f87cd
Van Oijen, J.A
57e7e907-4a20-4c77-be43-b3722516ea7f
Luo, K.H.
1c9be6c6-e956-4b12-af13-32ea855c69f3
Jiang, X.
008a11fa-f330-4355-b5c6-2878d1ab0f5c

Ranga Dinesh, K.K.J., Van Oijen, J.A, Luo, K.H. and Jiang, X. (2014) Near-field local flame extinction of oxy-syngas non-premixed jet flames: a DNS study. Fuel, 130 (15), 189-196. (doi:10.1016/j.fuel.2014.04.011).

Record type: Article

Abstract

An investigation of the local flame extinction of H2/CO oxy-syngas and syngas-air nonpremixed jet flames was carried out using three-dimensional direct numerical simulations (DNS) with detailed chemistry by using flamelet generated manifold chemistry (FGM). The work has two main objectives: identify the influence of the Reynolds number on the oxy-syngas flame structure, and to clarify the local flame extinction of oxy-syngas and syngas-air flames at a higher Reynolds number.

Two oxy-syngas flames at Reynolds numbers 3000 and 6000 and one syngas-air flame at Reynolds number 6000 were simulated. The scattered data, probability density function distributions and fully burning probability provide the local flame characteristics of oxy-syngas and syngas-air nonpremixed jet flames. It is found that the H2/CO oxy-syngas flame burns well compared to the syngas-air flame and the high Reynolds number causes more flow straining, resulting in higher scalar dissipation rates which lead to lower temperatures and eventually local flame extinction. The oxy-syngas flames burns more vigorously than the syngas-air flame with the same adiabatic flame temperature of approximately 2400 K.

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e-pub ahead of print date: 26 April 2014
Published date: 15 August 2014
Keywords: oxy-syngas flame, syngas-air flame, probability density functions, fully burning probability
Organisations: Faculty of Engineering and the Environment

Identifiers

Local EPrints ID: 369673
URI: http://eprints.soton.ac.uk/id/eprint/369673
PURE UUID: 7ec2409d-6e05-40f2-8fbd-536cc7a6343a
ORCID for K.K.J. Ranga Dinesh: ORCID iD orcid.org/0000-0001-9176-6834

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Date deposited: 07 Oct 2014 14:59
Last modified: 24 Sep 2019 00:37

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Contributors

Author: J.A Van Oijen
Author: K.H. Luo
Author: X. Jiang

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