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International Journal of Energetic Materials and Chemical Propulsion
ESCI SJR: 0.149 SNIP: 0.16 CiteScore™: 0.29

ISSN Print: 2150-766X
ISSN Online: 2150-7678

International Journal of Energetic Materials and Chemical Propulsion

DOI: 10.1615/IntJEnergeticMaterialsChemProp.2018022944
pages 151-163

CYCLIC QUENCHING AND IGNITION OF LOW-STRETCH DIFFUSION FLAMES

Gary P. Garbinski
Department of Mechanical and Aerospace Engineering, Case Western Reserve University, Cleveland, Ohio 44106, USA
James S. T'ien
Department of Mechanical and Aerospace Engineering, Case Western Reserve University, Cleveland, OH 44106, USA

ABSTRACT

A transient numerical simulation on the response of counter-flow gaseous diffusion flames was carried out over the entire range of stretch rates with the fuel and oxygen ambient temperatures as varying parameters. The model assumes an overall chemical reaction but with flame radiation loss. The shapes of steady flame response curve obtained include "isola" at low ambient temperatures and "ghost" at high ambient temperatures. A cyclic flame ignition and quenching phenomenon was discovered in a low stretch region with moderate ambient temperatures. This paper presents the computed response curves and, in particular, the time-resolved cyclic event. In addition, a map using ambient temperature and stretch rate as coordinates is given to show the various regions of the diffusion flame response.