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Reproducing curvature effects due to differential diffusion in tabulated chemistry for premixed flames

Schlup, Jason and Blanquart, Guillaume (2019) Reproducing curvature effects due to differential diffusion in tabulated chemistry for premixed flames. Proceedings of the Combustion Institute, 37 (2). pp. 2511-2518. ISSN 1540-7489. http://resolver.caltech.edu/CaltechAUTHORS:20180827-094621978

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Abstract

Tabulated chemistry reduces the cost of modeling reacting flows by transporting fewer scalars. It also has the benefit of introducing fewer terms that must be closed for Reynolds-averaged Navier-Stokes and large eddy simulation modeling. In this study of premixed lean hydrogen–air flames, an extension to an existing tabulated chemistry model was developed by including differential diffusion and thermal diffusion of multiple species, using a mixture-averaged diffusion model. The transport equations for the tabulation variables (a progress variable and a mixture fraction-like variable) have been formulated, and curvature effects are intrinsic to the transport equations derived from first principles. The mathematical derivation is general, such that other fuel/air mixtures could be examined. The new tabulated chemistry model was then validated using a range of configurations, including flames with curvature, extinction, and hot spots. The model validation indicated excellent agreement with detailed chemistry simulations for lean premixed hydrogen–air mixtures. Conditional means of the progress variable source term were shown to agree well with detailed chemistry simulations of two-dimensional freely propagating flames and three-dimensional turbulent flames. Finally, progress variable source terms three times higher than one-dimensional flat flame results were identified and validated with detailed chemistry, and super-adiabatic hot spots were also predicted in the turbulent flame configuration.


Item Type:Article
Related URLs:
URLURL TypeDescription
https://doi.org/10.1016/j.proci.2018.06.211DOIArticle
ORCID:
AuthorORCID
Schlup, Jason0000-0002-3121-3477
Blanquart, Guillaume0000-0002-5074-9728
Additional Information:© 2018 The Combustion Institute. Published by Elsevier. Received 1 December 2017, Revised 7 June 2018, Accepted 26 June 2018, Available online 25 August 2018.
Funders:
Funding AgencyGrant Number
Air Force Office of Scientific Research (AFOSR)FA9550-12-1-0472
Air Force Office of Scientific Research (AFOSR)FA9550-16-1-0510
NSFACI-1053575
Subject Keywords:Tabulated chemistry; Soret effect; Non-constant Lewis number; Direct numerical simulation
Record Number:CaltechAUTHORS:20180827-094621978
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:20180827-094621978
Official Citation:Jason Schlup, Guillaume Blanquart, Reproducing curvature effects due to differential diffusion in tabulated chemistry for premixed flames, Proceedings of the Combustion Institute, Volume 37, Issue 2, 2019, Pages 2511-2518, ISSN 1540-7489, https://doi.org/10.1016/j.proci.2018.06.211. (http://www.sciencedirect.com/science/article/pii/S1540748918303973)
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:89163
Collection:CaltechAUTHORS
Deposited By: George Porter
Deposited On:27 Aug 2018 18:03
Last Modified:29 Jan 2019 17:50

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