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Enthalpy based approach to capture heat transfer effects in premixed combustion

Menon, Shyam K. and Boettcher, Philipp A. and Blanquart, Guillaume (2013) Enthalpy based approach to capture heat transfer effects in premixed combustion. Combustion and Flame, 160 (7). pp. 1242-1253. ISSN 0010-2180. doi:10.1016/j.combustflame.2013.02.008.

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Mitigating the risk of explosion by hot-surface ignition of a flammable mixture has motivated experimental and numerical studies to characterize this phenomenon. The current numerical approach involves the solution of the low Mach-number Navier–Stokes equations coupled with detailed chemistry of n-heptane using a flamelet approach. Previous work with flamelets characterized by total enthalpy has allowed the inclusion of heat transfer effects (conduction and radiation) on ignition, flame propagation, and flame extinction. Unfortunately, total enthalpy and the progress variable (extent of reaction), typically used for the chemistry tabulation, are not independent. The current work details the development of a novel technique based on modeling enthalpy variations through the use of unburned gas temperature. A transport equation for the unburned gas temperature which forms a key component of this technique is derived from an energy balance for a reacting flow problem. After verifying the technique for 1-D freely propagating adiabatic flames, the improved model is used to study 2-D flame propagation in the presence of a thermal plume initiated by a hot-surface. A comparison of the simulation results with experimental data shows that the enthalpy based approach successfully captures finite-rate chemical kinetics in a thermally stratified mixture.

Item Type:Article
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URLURL TypeDescription
Blanquart, Guillaume0000-0002-5074-9728
Additional Information:© 2013 The Combustion Institute. Published by Elsevier Inc. Received 14 July 2012. Received in revised form 3 November 2012. Accepted 8 February 2013. Available online 2 April 2013. The authors gratefully acknowledge funding for this research by the Boeing Company through a Strategic Research and Development Relationship Agreement CT-BA-GTA-1.
Funding AgencyGrant Number
Boeing Company Strategic Research and Development RelationshipCT-BA-GTA-1
Subject Keywords:Tabulated chemistry; Laminar flames; Flame speed; Temperature stratification; Enthalpy variation
Issue or Number:7
Record Number:CaltechAUTHORS:20130717-073851023
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Official Citation:Shyam K. Menon, Philipp A. Boettcher, Guillaume Blanquart, Enthalpy based approach to capture heat transfer effects in premixed combustion, Combustion and Flame, Volume 160, Issue 7, July 2013, Pages 1242-1253, ISSN 0010-2180, (
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:39404
Deposited By: Ruth Sustaita
Deposited On:17 Jul 2013 14:57
Last Modified:09 Nov 2021 23:44

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