Results 191 to 200 of about 26,791 (233)

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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On flame kernel formation and propagation in premixed gases

Combustion and Flame, 2010
Flame kernel formation and propagation in premixed gases have been studied experimentally and theoretically. The experiments have been carried out at constant pressure and temperature in a constant volume vessel located in a high speed shadowgraph system.
Kian Eisazadeh-Far, Farzan Parsinejad, Hameed Metghalchi, James C. Keck   +3 more
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The Effects of Charge Motion on Early Flame Kernel Development

SAE Technical Paper Series, 1993
<div class="htmlview paragraph">The fiber optic spark plug was used in conjunction with a piezoelectric pressure transducer to collect combustion diagnostic data on four production engines designed to generate quiescent, swirl, and tumble charge motions. Spark advance was varied under low speed, low load conditions to investigate changes in flame
David L. Lord, Richard W. Anderson, Diana D. Brehob, Youngil Kim   +3 more
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Chemical effects of plasma gases on flame kernel development

Proceedings of the Royal Society of London. A. Mathematical and Physical Sciences, 1988
A study of the plasma jet ignition of lean methane-air mixtures was conducted to determine the effect of different plasma gases on flame kernel development. A plasma igniter, incorporating a shutter that separated the gases in the igniter from the reactant gases in a combustion chamber before discharge, allowed any combination of gases to ...
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Mechanism of flame kernel formation produced by short duration sparks

Symposium (International) on Combustion, 1989
With 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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Flame kernel formation and propagation modelling in spark ignition engines

Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering, 2001
One-dimensional, time-dependent numerical simulations of flame kernel growth produced by a spark in a combustible gasoline-air mixture are presented. This model accounts for the fundamental properties of the ignition system, the combustible mixture and flow fleld.
Jeonghoon. Song, Myoungho. Sunwoo
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Simulating expanding flame kernels and turbulent jet flames with tabulated chemistry

2012
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Gruselle, Catherine, Pecquery, François, Moureau, Vincent, Taieb, David, Lartigue, Ghislain, Domingo, Pascale, Vervisch, Luc, Ribert, Guillaume, d'Angelo, Yves   +8 more
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A model for flame kernel growth at aircraft relight conditions

Symposium (International) on Combustion, 1994
A 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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Form Kernel P Systems to X-Machines and Flame

2014
Kernel P systems have been introduced with the aim of unifying different variants of P systems. They provide a coherent framework for specifying and solving a broad spectrum of problems. The tools built so far have aimed to formally verify systems modelled as kernel P systems, but the simulators obtained are not very efficient.
Niculescu, Ionuţ Mihai, Gheorghe, Marian, Ipate, Florentin, Ştefănescu, Alin   +3 more
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Improvement of Flame Kernel Growth by Microwave-Assisted Plasma Ignition

2019
Due 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, Wooyeong Kim, Choongsik Bae   +2 more
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