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Title: Stochastic modeling of unsteady extinction in turbulent non-premixed combustion

Turbulent fluctuations of the scalar dissipation rate have a major impact on extinction in non-premixed combustion. Recently, an unsteady extinction criterion has been developed (Hewson, 2013) that predicts extinction dependent on the duration and the magnitude of dissipation rate fluctuations exceeding a critical quenching value; this quantity is referred to as the dissipation impulse. Furthermore, the magnitude of the dissipation impulse corresponding to unsteady extinction is related to the difficulty with which a flamelet is exintguished, based on the steady-state S-curve.
 [1] ;  [2] ;  [2] ;  [3] ;  [1]
  1. Chambers Univ. of Technology, Gothenburg (Sweden)
  2. Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
  3. Consultant, Danville, CA (United States)
Publication Date:
OSTI Identifier:
Report Number(s):
Journal ID: ISSN 1540-7489; PII: S154074891630270X
Grant/Contract Number:
Accepted Manuscript
Journal Name:
Proceedings of the Combustion Institute
Additional Journal Information:
Journal Name: Proceedings of the Combustion Institute; Journal ID: ISSN 1540-7489
Research Org:
Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Sponsoring Org:
USDOE National Nuclear Security Administration (NNSA)
Country of Publication:
United States
32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION; extinction; unsteady flames; non-premixed flame; scalar dissipation rate; turbulence