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

Abstract

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.

Authors:
 [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:
Research Org.:
Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA)
OSTI Identifier:
1275513
Alternate Identifier(s):
OSTI ID: 1413160
Report Number(s):
SAND-2016-7105J
Journal ID: ISSN 1540-7489; PII: S154074891630270X
Grant/Contract Number:  
AC04-94AL85000
Resource Type:
Accepted Manuscript
Journal Name:
Proceedings of the Combustion Institute
Additional Journal Information:
Journal Name: Proceedings of the Combustion Institute; Journal ID: ISSN 1540-7489
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION; extinction; unsteady flames; non-premixed flame; scalar dissipation rate; turbulence

Citation Formats

Lackmann, T., Hewson, J. C., Knaus, R. C., Kerstein, A. R., and Oevermann, M. Stochastic modeling of unsteady extinction in turbulent non-premixed combustion. United States: N. p., 2016. Web. doi:10.1016/j.proci.2016.07.014.
Lackmann, T., Hewson, J. C., Knaus, R. C., Kerstein, A. R., & Oevermann, M. Stochastic modeling of unsteady extinction in turbulent non-premixed combustion. United States. doi:10.1016/j.proci.2016.07.014.
Lackmann, T., Hewson, J. C., Knaus, R. C., Kerstein, A. R., and Oevermann, M. Tue . "Stochastic modeling of unsteady extinction in turbulent non-premixed combustion". United States. doi:10.1016/j.proci.2016.07.014. https://www.osti.gov/servlets/purl/1275513.
@article{osti_1275513,
title = {Stochastic modeling of unsteady extinction in turbulent non-premixed combustion},
author = {Lackmann, T. and Hewson, J. C. and Knaus, R. C. and Kerstein, A. R. and Oevermann, M.},
abstractNote = {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.},
doi = {10.1016/j.proci.2016.07.014},
journal = {Proceedings of the Combustion Institute},
number = ,
volume = ,
place = {United States},
year = {2016},
month = {7}
}

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