Large Eddy Simulation on the Effects of Pressure on Syngas/Air Turbulent Nonpremixed Jet Flames
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Ciottoli, Pietro P.Lee, Bok Jik
Lapenna, Pasquale E.
Malpica Galassi, Riccardo
Hernandez Perez, Francisco
Martelli, Emanuele
Valorani, Mauro
Im, Hong G.

KAUST Department
Clean Combustion Research CenterComputational Reacting Flow Laboratory (CRFL)
Mechanical Engineering
Mechanical Engineering Program
Physical Science and Engineering (PSE) Division
KAUST Grant Number
1975-03 CCFDate
2019-06-24Online Publication Date
2019-06-24Print Publication Date
2020-10-02Embargo End Date
2020-06-24Permanent link to this record
http://hdl.handle.net/10754/656145
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The influence of increasing pressure on nonpremixed syngas/air turbulent jet flames is numerically investigated using large eddy simulations in conjunction with a steady laminar flamelet approach. The applicability of the steady flamelet approach is assessed through an extensive parametric study of laminar counterflow flames and tangential stretching rate analysis on target flame structures at different pressures. Two sets of large eddy simulations, exploring pressure values up to 10 atm, are carried out. The first one (series A) is characterized by a constant jet Reynolds number, while the second one (series B) is characterized by a constant jet inlet velocity. Both campaigns show narrower flame brushes and reduced radical concentrations with increasing pressure. While for series A the flame length is not sensitive to pressure, a longer flame brush is noticed for series B, being mainly caused by the increased mass flow rate. The sensitivity of the local flame behavior to pressure, such as the OH layer thickness and position, is compared to the available experimental results, showing similar trends with a satisfactory agreement.Citation
Ciottoli, P. P., Lee, B. J., Lapenna, P. E., Malpica Galassi, R., Hernández-Pérez, F. E., Martelli, E., … Im, H. G. (2019). Large Eddy Simulation on the Effects of Pressure on Syngas/Air Turbulent Nonpremixed Jet Flames. Combustion Science and Technology, 192(10), 1963–1996. doi:10.1080/00102202.2019.1632300Sponsors
This work was supported by the National Research Foundation of Korea [2013R1A5A1073861, 2017R1A2B4003327]; KAUST [1975-03 CCF Subaward Agreement].Publisher
Informa UK LimitedAdditional Links
https://www.tandfonline.com/doi/full/10.1080/00102202.2019.1632300ae974a485f413a2113503eed53cd6c53
10.1080/00102202.2019.1632300