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Investigation of Turbulent Flame Kernels Using DNS on Clusters
2003A parallel code for the direct numerical simulation (DNS) of reactive flows using detailed chemical kinetics and multicomponent molecular transport is presented. This code has been used as a benchmark on several commodity hardware clusters including two large systems with current state-of-the-art processor and network technologies, i. e.
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Randomness of Flame Kernel Development in Turbulent Gas Mixture
SAE Technical Paper Series, 1998<div class="htmlview paragraph">An expanding cylindrical laminar flame kernel affected by random external strain rates and diffusivity is numerically simulated in order to gain insight into the influence of small-scale turbulence on the combustion variability in engines. In the simulations, the kernel is strained, as a whole, by external velocity
Andrei N. Lipatnikov, Jerzy Chomiak
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A model for flame kernel growth at aircraft relight conditions
Symposium (International) on Combustion, 1994A one-dimensional (1D), comprehensive numerical model for the prediction of flame kernel development at high altitude relight conditions in aircraft gas turbines is proposed and tested. The main purpose of this study is to develop a new methodology to numerically solve the very complicated governing equations involved in the flame kernel initiation and
Deryuh Liou, Domenic A. Santavicca
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A model for flame kernel development in a spark-ignition engine
Symposium (International) on Combustion, 1991A First-Law-based model for the growth of the spark-generated flame kernel in a spark-ignition engine has been developed and applied. The purpose of the study was to show how the basic physics relevant to the early stages of flame growth—electrical energy deposition, chemical energy release, and heat losses to the spark plug—can explain the observed ...
Stefan Pischinger, John B. Heywood
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Mechanism of flame kernel formation produced by short duration sparks
Symposium (International) on Combustion, 1989With reference to flame kernel developments in spark ignition of combustible mixtures, the formation process of hot kernels produced by short duration sparks (less than 0.3 μs) in an inert gas is modeled by using a set of partial differential equations with unsteady and two-dimensional cyclindrical coordinates.
M. Kono, K. Niu, T. Tsukamoto, Y. Ujiie
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Simulating expanding flame kernels and turbulent jet flames with tabulated chemistry
2012no ...
Gruselle, Catherine +8 more
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Improvement of Flame Kernel Growth by Microwave-Assisted Plasma Ignition
2019Due to the depletion of petroleum resources and environmental concerns, automobile industry has been developing new engine technologies with acceptable cost range to consumers. Among many new technologies, application of non-thermal plasma ignition system is considered as a promising path to achieve high-efficiency clean gasoline vehicles.
Joonsik Hwang +2 more
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Research on formation and growth of flame kernel in spark ignition engine
JSAE Review, 1995Abstract The recent developments for lean mixture and high EGR ratio in the spark ignition engine have improved fuel consumption and exhaust emission, so that partial pressure of oxygen, or fuel density in the cylinder, is reduced; thus, the energy necessary for ignition is increased [1–4].
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Effect of unsteady stretch on spark-ignited flame kernel survival
Combustion and Flame, 1999Abstract The chemistry–turbulence interaction remains one of the most important topics in combustion research. The ignition of premixed reactants in a highly turbulent environment is fundamentally coupled to this chemistry–turbulence interaction. The spark-ignition (SI) internal combustion (IC) engine relies on the ability of the flame kernel to ...
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Effects of differential diffusion on hydrogen flame kernel development under engine conditions
Proceedings of the Combustion Institute, 2023Hongchao Chu +2 more
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