Influence of Pilot Flame Parameters on the Stability of Turbulent Jet Flames

Handle URI:
http://hdl.handle.net/10754/623426
Title:
Influence of Pilot Flame Parameters on the Stability of Turbulent Jet Flames
Authors:
Guiberti, Thibault F.; Cutcher, Hugh; Roberts, William L. ( 0000-0003-1999-2831 ) ; Masri, Assaad R.
Abstract:
This paper presents a comprehensive study of the effects of pilot parameters on flame stability in a turbulent jet flame. The Sydney inhomogeneous piloted burner is employed as the experimental platform with two main fuels, namely, compressed natural gas and liquefied petroleum gas. Various concentrations of five gases are used in the pilot stream, hydrogen, acetylene, oxygen, nitrogen, and argon, to enable a sufficient range in exploring the following parameters: pilot heat release, temperature, burnt gas velocity, equivalence ratio, and H/C ratio. The experimental results are mainly presented in the form of blow-off limits and supported by simple calculations, which simulate various conditions of the pilot–mixture interface. It is found that increasing the pilot adiabatic flame temperature benefits the flame stability and has an even greater influence than the heat release, which is also known to enhance the blow-off limits. Conversely, increasing the pilot burnt gas velocity reduces the blow-off velocity, except for the limiting case when the jet is fully non-premixed. The H/C ratio has negligible effects, while resorting to lean pilots significantly increases the stability of globally rich partially premixed and premixed jets. Such findings are consistent with trends obtained from laminar flame calculations for rich fuel/air mixtures issuing against hot combustion products to simulate the pilot stream.
KAUST Department:
Clean Combustion Research Center
Citation:
Guiberti TF, Cutcher H, Roberts WL, Masri AR (2016) Influence of Pilot Flame Parameters on the Stability of Turbulent Jet Flames. Energy & Fuels 31: 2128–2137. Available: http://dx.doi.org/10.1021/acs.energyfuels.6b02052.
Publisher:
American Chemical Society (ACS)
Journal:
Energy & Fuels
Issue Date:
8-Nov-2016
DOI:
10.1021/acs.energyfuels.6b02052
Type:
Article
ISSN:
0887-0624; 1520-5029
Sponsors:
This work is supported by the Australian Research Council (Grant DP110105535) and the CCRC, KAUST.
Additional Links:
http://pubs.acs.org/doi/abs/10.1021/acs.energyfuels.6b02052
Appears in Collections:
Articles; Clean Combustion Research Center

Full metadata record

DC FieldValue Language
dc.contributor.authorGuiberti, Thibault F.en
dc.contributor.authorCutcher, Hughen
dc.contributor.authorRoberts, William L.en
dc.contributor.authorMasri, Assaad R.en
dc.date.accessioned2017-05-09T12:54:45Z-
dc.date.available2017-05-09T12:54:45Z-
dc.date.issued2016-11-08en
dc.identifier.citationGuiberti TF, Cutcher H, Roberts WL, Masri AR (2016) Influence of Pilot Flame Parameters on the Stability of Turbulent Jet Flames. Energy & Fuels 31: 2128–2137. Available: http://dx.doi.org/10.1021/acs.energyfuels.6b02052.en
dc.identifier.issn0887-0624en
dc.identifier.issn1520-5029en
dc.identifier.doi10.1021/acs.energyfuels.6b02052en
dc.identifier.urihttp://hdl.handle.net/10754/623426-
dc.description.abstractThis paper presents a comprehensive study of the effects of pilot parameters on flame stability in a turbulent jet flame. The Sydney inhomogeneous piloted burner is employed as the experimental platform with two main fuels, namely, compressed natural gas and liquefied petroleum gas. Various concentrations of five gases are used in the pilot stream, hydrogen, acetylene, oxygen, nitrogen, and argon, to enable a sufficient range in exploring the following parameters: pilot heat release, temperature, burnt gas velocity, equivalence ratio, and H/C ratio. The experimental results are mainly presented in the form of blow-off limits and supported by simple calculations, which simulate various conditions of the pilot–mixture interface. It is found that increasing the pilot adiabatic flame temperature benefits the flame stability and has an even greater influence than the heat release, which is also known to enhance the blow-off limits. Conversely, increasing the pilot burnt gas velocity reduces the blow-off velocity, except for the limiting case when the jet is fully non-premixed. The H/C ratio has negligible effects, while resorting to lean pilots significantly increases the stability of globally rich partially premixed and premixed jets. Such findings are consistent with trends obtained from laminar flame calculations for rich fuel/air mixtures issuing against hot combustion products to simulate the pilot stream.en
dc.description.sponsorshipThis work is supported by the Australian Research Council (Grant DP110105535) and the CCRC, KAUST.en
dc.publisherAmerican Chemical Society (ACS)en
dc.relation.urlhttp://pubs.acs.org/doi/abs/10.1021/acs.energyfuels.6b02052en
dc.titleInfluence of Pilot Flame Parameters on the Stability of Turbulent Jet Flamesen
dc.typeArticleen
dc.contributor.departmentClean Combustion Research Centeren
dc.identifier.journalEnergy & Fuelsen
dc.contributor.institutionSchool of Aerospace, Mechanical and Mechatronic Engineering, The University of Sydney, Sydney, New South Wales 2006, Australiaen
kaust.authorGuiberti, Thibault F.en
kaust.authorRoberts, William L.en
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