Numerical Simulation of Unsteady CH/Air Jet Diffusion Flame

- Journal title : Transactions of the Korean Society of Mechanical Engineers B
- Volume 25, Issue 8, 2001, pp.1087-1096
- Publisher : The Korean Society of Mechanical Engineers
- DOI : 10.22634/KSME-B.2001.25.8.1087

Title & Authors

Numerical Simulation of Unsteady CH/Air Jet Diffusion Flame

Lee, Chang-Eon; O, Chang-Bo;

Lee, Chang-Eon; O, Chang-Bo;

Abstract

The dynamic structures of unsteady CH/Air jet diffusion flame with a flame-vortex interaction were numerically investigated. A timed-dependent, axisymmetric computational model and a low mach number approximation were employed in the present calculation. A two-step global reaction mechanism which considers 6 species, was used to calculate the reaction rates. The predicted results including the gravitational effect show that the large outer vortices and the small inner vortices can be well simulated without any additional disturbances near nozzle tip. It was found that the temperature and species concentrations have deviated values even for the same mixture fraction in the flame-vortex interaction region. It was also shown that the flame surface is not deformed by the inner vortex in upstream region, while in downstream region, the flame surface is compressed or stretched by the outer vortex roll-up. The present unsteady jet flame configuration accompanying a flame-vortex interaction is expected to give good implications for the unsteady structures of turbulent flames.

Keywords

Unsteady Jet;Flame-Vortex Interaction;Reacting Flow;Predictor-Corrector Scheme;

Language

Korean

Cited by

1.

확산지배 난류 연소현상에서 역해석을 이용한 CH_{4}/O_{2}의 초기 질량분율 추정에 관한 연구,이균호;백승욱;

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