Comparison of Combustion Models and Assessment of Their Applicability to the Simulation of Premixed Turbulent Combustion in IC-Engines |
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Authors: | A Brandl M Pfitzner J D Mooney B Durst W Kern |
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Institution: | 1. Institut für Thermodynamik, Universit?t der Bundeswehr, München, Germany 2. BMW, München, Germany
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Abstract: | In order to simulate the turbulent combustion process occurring in spark-ignition (IC) engines, it is necessary to provide
suitable and numerically economical models, the latter being particularly important in the application to industrial problems.
Moreover, these models must deliver sufficiently accurate results for the unsteady operation of spark combustion engines,
concerning variable geometries, temperatures, pressures and charge development in different configurations. In this work different
turbulent combustion models for premixed hydrocarbon combustion are compared with respect to their ability to accurately predict
the propagation of turbulent perfectly premixed flames.
As a first configuration a cylinder of constant volume was studied. Transient calculations were used to simulate the propagation
of the turbulent flame and to evaluate the resulting turbulent burning velocity. These calculations were performed for a perfect
mixture of air and hydrocarbons at stoichiometric mixture and different initial conditions concerning pressure, temperature
and turbulence intensity. As a second configuration a stationary turbulent bunsen-type flame with methane fuel was used to
validate the turbulent combustion model of Lindstedt and Vaos, Combust. Flame 116 (1999) 461] at different pressures. Calculated results were then compared to experimental data of Kobayashi, Tamura,
Maruta and Niioka. In: Proceedings of the 26th Symposium on Combustion, 1996, p. 389] and show excellent agreement for the turbulent burning velocity at several pressure levels using only a single
set of model parameters. |
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Keywords: | premixed turbulent combustion IC-engines |
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