Asymptotic theory of diffusion flame extinction with surface radiation

B. H. Chao, Chung King Law

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Using counterflow combustion as a model problem, the structure and extinction of heterogeneous diffusion flames with radiative heat loss from the condensed fuel surface have been studied via activation energy asymptotics. The analysis yields solutions for the flame temperature, mass burning rate and the flamefront standoff distance, as well as the structure equation for the reaction zone which is identical to that of Linan previously analyzed for situations which are either globally adiabatic or subjected to radiative loss from the flame zone. The system also exhibits the dual extinction turning point behavior, in which flame extinction can occur not only for sufficiently large stretch rates but also for sufficiently small values as a result of excessive heat loss and thereby flame weakening. Consequently there exist systems for which steady combustion is not possible for all stretch rates. Similarities and differences of the present situation with other diffusion flame systems are emphasized.

Original languageEnglish (US)
Title of host publicationHeat Transfer in Fire and Combustion Systems - 1991
PublisherPubl by ASME
Pages27-34
Number of pages8
ISBN (Print)0791807355
StatePublished - Jan 1 1991
Event28th National Heat Transfer Conference - Minneapolis, MN, USA
Duration: Jul 28 1991Jul 31 1991

Publication series

NameAmerican Society of Mechanical Engineers, Heat Transfer Division, (Publication) HTD
Volume166
ISSN (Print)0272-5673

Other

Other28th National Heat Transfer Conference
CityMinneapolis, MN, USA
Period7/28/917/31/91

All Science Journal Classification (ASJC) codes

  • Mechanical Engineering
  • Fluid Flow and Transfer Processes

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