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Grid resolution requirement of chemical explosive mode analysis for large eddy simulations of premixed turbulent combustion

Journal Article · · Combustion Theory and Modelling
 [1];  [2];  [1];  [1]
  1. Shanghai Jiao Tong Univ. (China)
  2. Argonne National Laboratory (ANL), Argonne, IL (United States)
Full Article Figures & data References Citations Metrics Reprints & Permissions Read this article Abstract The grid resolution requirement for trustworthy Chemical Explosive Mode Analysis (CEMA) in Large Eddy Simulation (LES) of premixed turbulent combustion is proposed. Explicit filtering, to emulate the effect of the LES filter, is applied to one-dimensional laminar flame and three-dimensional planar turbulent flames across a wide range of Karlovitz numbers (5 - 239). The identification of the flame front by CEMA is found relatively insensitive to the cell size (Δ), while the combustion mode identification shows more significant sensitivity. Specifically, increasing Δ falsely enhances the auto-ignition and local extinction modes and suppresses the diffusion-assisted mode. Limited dependence of the CEMA performance on the turbulent combustion regime (Karlovitz number) is observed. A simple grid size criterion for reliable CEMA mode identification in LES is proposed as Δ ≲ δL/2; The criterion can be relaxed to Δ ≲ δL in the laminar flame limit. Furthermore, theoretical analysis is conducted on an idealised chemistry-diffusion system. The effects of the filtering process and turbulence on the local combustion mode are demonstrated, which is consistent with the numerical observations. Further, by incorporating turbulent combustion models in CEMA, potential improvement in identifying local combustion modes can be expected.
Research Organization:
Argonne National Laboratory (ANL), Argonne, IL (United States)
Sponsoring Organization:
National Natural Science Foundation of China (NSFC); Shanghai Municipal Natural Science Foundation; USDOE Office of Energy Efficiency and Renewable Energy (EERE)
Grant/Contract Number:
AC02-06CH11357
OSTI ID:
2536677
Journal Information:
Combustion Theory and Modelling, Journal Name: Combustion Theory and Modelling Journal Issue: 2 Vol. 28; ISSN 1364-7830
Publisher:
Taylor & FrancisCopyright Statement
Country of Publication:
United States
Language:
English

References (35)

Numerical and Analytical Assessment of Finite Rate Chemistry Models for LES of Turbulent Premixed Flames journal May 2022
Chemical explosive mode analysis for a turbulent lifted ethylene jet flame in highly-heated coflow journal January 2012
Computational diagnostics for n-heptane flames with chemical explosive mode analysis journal October 2012
LES combustion modeling for high Re flames using a multi-phase analogy journal January 2013
Dynamic adaptive combustion modeling of spray flames based on chemical explosive mode analysis journal September 2018
Autoignition-cascade in the windward mixing layer of a premixed jet in hot vitiated crossflow journal March 2019
Regimes of premixed turbulent spontaneous ignition and deflagration under gas-turbine reheat combustion conditions journal October 2019
Structure of strongly turbulent premixed n-dodecane–air flames: Direct numerical simulations and chemical explosive mode analysis journal November 2019
The origin of CEMA and its relation to CSP journal May 2021
pyJac: Analytical Jacobian generator for chemical kinetics journal June 2017
Finite rate simulations and analyses of wet/distributed flame structure in swirl-stabilized combustion journal April 2021
Large eddy simulation of a medium-scale methanol pool fire using the extended eddy dissipation concept journal March 2014
Large Eddy Simulations of gaseous flames in gas turbine combustion chambers journal December 2012
Structure and dynamics of highly turbulent premixed combustion journal July 2021
Direct numerical simulation of flame stabilization assisted by autoignition in a reheat gas turbine combustor journal January 2019
Identification of premixed flame propagation modes using chemical explosive mode analysis journal January 2019
Identification of combustion mode under MILD conditions using Chemical Explosive Mode Analysis journal January 2021
DNS Of the ignition process of n-heptane/air premixed combustion with low-temperature chemistry in turbulent boundary layer journal January 2023
Turbulent Combustion book January 2010
Three-dimensional direct numerical simulation of a turbulent lifted hydrogen jet flame in heated coflow: a chemical explosive mode analysis journal May 2010
Statistical theory for compressible turbulent shear flows, with the application to subgrid modeling journal January 1986
A thickened flame model for large eddy simulations of turbulent premixed combustion journal July 2000
Effects of evaporation on chemical reactions in counterflow spray flames journal June 2021
Numerical study on oscillatory propagation dynamics and physics near the limits of planar freely propagating premixed flames journal August 2021
Reaction front development from ignition spots inn-heptane/air mixtures: Low-temperature chemistry effects induced by ultrafine water droplet evaporation journal August 2021
Ignition and deflagration-to-detonation transition modes in ethylene/air mixtures behind a reflected shock journal August 2022
Flame acceleration and transition to detonation in a pre-/main-chamber combustion system journal November 2022
The Eddy Dissipation Turbulence Energy Cascade Model journal October 2000
Using CSP to Understand Complex Chemical Kinetics journal March 1993
Large eddy simulation/thickened flame model simulations of a lean partially premixed gas turbine model combustor journal September 2021
Ten questions concerning the large-eddy simulation of turbulent flows journal January 2004
Large-Eddy Simulations as a Design Tool for Gas Turbine Combustion Systems journal April 2006
Flame Diagnostics with a Conservative Representation of Chemical Explosive Mode Analysis journal April 2019
Analysis of The Chemical States of A Bluff-body Stabilized Premixed Flame Near Blowoff conference January 2019
Large-Eddy Simulations and Mode Analysis of Ethylene/Air Combustion in a Non-Premixed Rotating Detonation Engine conference August 2020