TY - CONF
T1 - Direct numerical simulation of a turbulent nonpremixed "cool" flame
AU - Novoselov, Alex G.
AU - Mueller, Michael E.
N1 - Funding Information:
A.G.N. gratefully acknowledges funding from the Microgravity Combustion program at NASA. The authors gratefully acknowledge valuable support in the form of computational time on the TIGRESS high performance computer center at Princeton University, which is jointly supported by the Princeton Institute for Computational Science and Engineering (PICSciE) and the Princeton University Office of Information Technology’s Research Computing Department.
Publisher Copyright:
© 2017 Eastern States Section of the Combustion Institute. All rights reserved.
PY - 2017
Y1 - 2017
N2 - The low-temperature chemistry characteristics of many fuels can couple with molecular transport to result in low-temperature nonpremixed "cool" flames, that is, thin reacting structures governed by low-temperature chemistry rather than high-temperature flame chemistry. Laminar "cool" flames have been studied both experimentally and computationally, but turbulent "cool" flames have not yet been investigated. In this work, an isolated turbulent nonpremixed "cool" flame of n-heptane and oxygen in isotropic turbulence is simulated using Direct Numerical Simulation. The n-heptane chemistry is described with a skeletal mechanism including low-temperature chemistry, which reproduces both the "cool" and "hot" flames when compared to the detailed mechanism. The results of the DNS calculations indicate that the turbulent nonpremixed "cool" flame is well described by the steady flamelet model when subjected to sufficiently slow turbulence.
AB - The low-temperature chemistry characteristics of many fuels can couple with molecular transport to result in low-temperature nonpremixed "cool" flames, that is, thin reacting structures governed by low-temperature chemistry rather than high-temperature flame chemistry. Laminar "cool" flames have been studied both experimentally and computationally, but turbulent "cool" flames have not yet been investigated. In this work, an isolated turbulent nonpremixed "cool" flame of n-heptane and oxygen in isotropic turbulence is simulated using Direct Numerical Simulation. The n-heptane chemistry is described with a skeletal mechanism including low-temperature chemistry, which reproduces both the "cool" and "hot" flames when compared to the detailed mechanism. The results of the DNS calculations indicate that the turbulent nonpremixed "cool" flame is well described by the steady flamelet model when subjected to sufficiently slow turbulence.
KW - "Cool"
KW - DNS
KW - Flames
KW - Turbulent combustion
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M3 - Paper
AN - SCOPUS:85048949851
T2 - 10th U.S. National Combustion Meeting
Y2 - 23 April 2017 through 26 April 2017
ER -