Numerical simulations of turbulent non-premixed jet flames of hydrogen-enriched fuels

Mira Martinez, Daniel and Jiang, Xi and Moulinec, C. and Emerson, D.R. (2013) Numerical simulations of turbulent non-premixed jet flames of hydrogen-enriched fuels. Computers and Fluids, 88. pp. 688-701. ISSN 0045-7930

Full text not available from this repository.

Abstract

Large-eddy simulation is conducted to study the turbulent combustion processes of hydrogen and syngas flames. The subgrid scale momentum transport is performed with a one-equation model using the subgrid scale turbulent kinetic energy, while the linear-eddy model is employed to represent the scalar transport. Reduced chemical kinetics is used to describe the flame chemistry with the extended Zeldovich mechanism to account for the thermal formation of NOx. Results show the effects of the hydrogen content and of the Reynolds number on the characteristics of the flames. Higher hydrogen content contributes to increase the heat released after combustion leading to higher temperature peaks and thicker shear layers. The presence of CO in the fuel stream affects the flame dynamics with the development of a more vortical and wrinkled flow field. The vorticity field and turbulence/chemistry interactions are also discussed. Scalar profiles and comparison against experimental data are presented where a reasonable agreement is observed.

Item Type:
Journal Article
Journal or Publication Title:
Computers and Fluids
Uncontrolled Keywords:
/dk/atira/pure/subjectarea/asjc/1700
Subjects:
ID Code:
64835
Deposited By:
Deposited On:
04 Jun 2013 09:08
Refereed?:
Yes
Published?:
Published
Last Modified:
19 Feb 2020 08:13