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A Simple Model of Unsteady Turbulent Flame Propagation
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Abstract
A model of premixed turbulent combustion is modified for multi-dimensional computations of SI engines. This approach is based on the use of turbulent flame speed in order to suggest a closed balance equation for the mean combustion progress variable. The model includes a single unknown input parameter to be tuned.
This model is tested against two sets of experimental data obtained by Bradley et al [17, 18 and 19] and Karpov and Severin [15] in fan-stirred bombs. The model quantitatively predicts the development of the turbulent flame speed, the effects of the initial pressure, temperature, and mixture composition on the turbulent flame speed, and the effects of r.m.s. turbulent velocity and burning mixture composition on the rate of the pressure rise. These results were computed with the same value of the aforementioned unknown input parameter of the model.
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Citation
Lipatnikov, A. and Chomiak, J., "A Simple Model of Unsteady Turbulent Flame Propagation," SAE Technical Paper 972993, 1997, https://doi.org/10.4271/972993.Also In
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