Hydrodynamic and chemical effects of hydrogen addition on soot evolution in turbulent nonpremixed bluff body ethylene flames

Sili Deng; Michael E. Mueller; Qing N. Chan; Nader H. Qamar; Bassam B. Dally; Zeyad T. Alwahabi; Graham J. Nathan

doi:10.1016/j.proci.2016.09.004

Hydrodynamic and chemical effects of hydrogen addition on soot evolution in turbulent nonpremixed bluff body ethylene flames

Sili Deng
, Michael E. Mueller
, Qing N. Chan
, Nader H. Qamar
, Bassam B. Dally
, Zeyad T. Alwahabi
, Graham J. Nathan

Research output: Contribution to journal › Article › peer-review

36 Scopus citations

Abstract

The evolution of soot in a turbulent nonpremixed bluff body ethylene/H₂ (2:1 by volume) flame was examined using combined experiments and Large Eddy Simulations subsequently compared with a neat ethylene counterpart (Muelleret al. 2013). The maximum soot volume fraction in the recirculation zone and jet-like region of the ethylene/H₂ case were remarkably lower than that of the ethylene case. Flamelet calculations showed that H₂ addition suppressed soot formation due to C/H ratio reduction leading to an estimated fourfold reduction in soot volume fraction due to chemical effects. Soot reduction in the downstream jet-like region of the flame was quantitatively consistent with this chemical effect. Meanwhile soot reduction in the recirculation zone was significantly larger than this analysis implying an additional hydrodynamic effect.

Original language	English (US)
Pages (from-to)	807-814
Number of pages	8
Journal	Proceedings of the Combustion Institute
Volume	36
Issue number	1
DOIs	https://doi.org/10.1016/j.proci.2016.09.004
State	Published - 2017

All Science Journal Classification (ASJC) codes

General Chemical Engineering
Mechanical Engineering
Physical and Theoretical Chemistry

Keywords

Bluff body flame
Large Eddy Simulation (LES)
Laser-induced incandescence
Soot
Turbulent nonpremixed flame

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10.1016/j.proci.2016.09.004

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@article{49e0ed17720b43e38e15a07e1f761499,

title = "Hydrodynamic and chemical effects of hydrogen addition on soot evolution in turbulent nonpremixed bluff body ethylene flames",

abstract = "The evolution of soot in a turbulent nonpremixed bluff body ethylene/H2 (2:1 by volume) flame was examined using combined experiments and Large Eddy Simulations subsequently compared with a neat ethylene counterpart (Muelleret al. 2013). The maximum soot volume fraction in the recirculation zone and jet-like region of the ethylene/H2 case were remarkably lower than that of the ethylene case. Flamelet calculations showed that H2 addition suppressed soot formation due to C/H ratio reduction leading to an estimated fourfold reduction in soot volume fraction due to chemical effects. Soot reduction in the downstream jet-like region of the flame was quantitatively consistent with this chemical effect. Meanwhile soot reduction in the recirculation zone was significantly larger than this analysis implying an additional hydrodynamic effect.",

keywords = "Bluff body flame, Large Eddy Simulation (LES), Laser-induced incandescence, Soot, Turbulent nonpremixed flame",

author = "Sili Deng and Mueller, \{Michael E.\} and Chan, \{Qing N.\} and Qamar, \{Nader H.\} and Dally, \{Bassam B.\} and Alwahabi, \{Zeyad T.\} and Nathan, \{Graham J.\}",

note = "Funding Information: The Australian authors gratefully acknowledge funding from the Australian Research Council (ARC) through the Discovery and the Linkage Infrastructure, Equipment, and Facilities (LIEF) grant programs.",

year = "2017",

doi = "10.1016/j.proci.2016.09.004",

language = "English (US)",

volume = "36",

pages = "807--814",

journal = "Proceedings of the Combustion Institute",

issn = "1540-7489",

publisher = "Elsevier Ltd",

number = "1",

}

TY - JOUR

T1 - Hydrodynamic and chemical effects of hydrogen addition on soot evolution in turbulent nonpremixed bluff body ethylene flames

AU - Deng, Sili

AU - Mueller, Michael E.

AU - Chan, Qing N.

AU - Qamar, Nader H.

AU - Dally, Bassam B.

AU - Alwahabi, Zeyad T.

AU - Nathan, Graham J.

N1 - Funding Information: The Australian authors gratefully acknowledge funding from the Australian Research Council (ARC) through the Discovery and the Linkage Infrastructure, Equipment, and Facilities (LIEF) grant programs.

PY - 2017

Y1 - 2017

N2 - The evolution of soot in a turbulent nonpremixed bluff body ethylene/H2 (2:1 by volume) flame was examined using combined experiments and Large Eddy Simulations subsequently compared with a neat ethylene counterpart (Muelleret al. 2013). The maximum soot volume fraction in the recirculation zone and jet-like region of the ethylene/H2 case were remarkably lower than that of the ethylene case. Flamelet calculations showed that H2 addition suppressed soot formation due to C/H ratio reduction leading to an estimated fourfold reduction in soot volume fraction due to chemical effects. Soot reduction in the downstream jet-like region of the flame was quantitatively consistent with this chemical effect. Meanwhile soot reduction in the recirculation zone was significantly larger than this analysis implying an additional hydrodynamic effect.

AB - The evolution of soot in a turbulent nonpremixed bluff body ethylene/H2 (2:1 by volume) flame was examined using combined experiments and Large Eddy Simulations subsequently compared with a neat ethylene counterpart (Muelleret al. 2013). The maximum soot volume fraction in the recirculation zone and jet-like region of the ethylene/H2 case were remarkably lower than that of the ethylene case. Flamelet calculations showed that H2 addition suppressed soot formation due to C/H ratio reduction leading to an estimated fourfold reduction in soot volume fraction due to chemical effects. Soot reduction in the downstream jet-like region of the flame was quantitatively consistent with this chemical effect. Meanwhile soot reduction in the recirculation zone was significantly larger than this analysis implying an additional hydrodynamic effect.

KW - Bluff body flame

KW - Large Eddy Simulation (LES)

KW - Laser-induced incandescence

KW - Soot

KW - Turbulent nonpremixed flame

UR - https://www.scopus.com/pages/publications/84992170638

UR - https://www.scopus.com/pages/publications/84992170638#tab=citedBy

U2 - 10.1016/j.proci.2016.09.004

DO - 10.1016/j.proci.2016.09.004

M3 - Article

AN - SCOPUS:84992170638

SN - 1540-7489

VL - 36

SP - 807

EP - 814

JO - Proceedings of the Combustion Institute

JF - Proceedings of the Combustion Institute

IS - 1

ER -

Hydrodynamic and chemical effects of hydrogen addition on soot evolution in turbulent nonpremixed bluff body ethylene flames

Abstract

All Science Journal Classification (ASJC) codes

Keywords

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