On cycle-to-cycle heat release variations in a simulated spark ignition heat engine

P. L. Curto-Risso; A. Medina; A. Calvo Hernández; L. Guzmán-Vargas; F. Angulo-Brown

doi:10.1016/j.apenergy.2010.11.030

On cycle-to-cycle heat release variations in a simulated spark ignition heat engine

P. L. Curto-Risso, A. Medina, A. Calvo Hernández, L. Guzmán-Vargas, F. Angulo-Brown

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Abstract

The cycle-by-cycle variations in heat release are analyzed by means of a quasi-dimensional computer simulation and a turbulent combustion model. The influence of some basic combustion parameters with a clear physical meaning is investigated: the characteristic length of the unburned eddies entrained within the flame front, a characteristic turbulent speed, and the location of the ignition kernel. The evolution of the simulated time series with the fuel-air equivalence ratio, φ, from lean mixtures to over stoichiometric conditions, is examined and compared with previous experiments. Fluctuations on the characteristic length of unburned eddies are found to be essential to simulate the cycle-to-cycle heat release variations and recover experimental results. A non-linear analysis of the system is performed. It is remarkable that at equivalence ratios around φ≃0.65, embedding and surrogate procedures show that the dimensionality of the system is small.

Original language	English
Pages (from-to)	1557-1567
Number of pages	11
Journal	Applied Energy
Volume	88
Issue number	5
DOIs	https://doi.org/10.1016/j.apenergy.2010.11.030
State	Published - May 2011

Keywords

Cycle-to-cycle variability
Non-linear dynamics
Quasi-dimensional simulations
Spark ignition engines

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10.1016/j.apenergy.2010.11.030

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title = "On cycle-to-cycle heat release variations in a simulated spark ignition heat engine",

abstract = "The cycle-by-cycle variations in heat release are analyzed by means of a quasi-dimensional computer simulation and a turbulent combustion model. The influence of some basic combustion parameters with a clear physical meaning is investigated: the characteristic length of the unburned eddies entrained within the flame front, a characteristic turbulent speed, and the location of the ignition kernel. The evolution of the simulated time series with the fuel-air equivalence ratio, φ, from lean mixtures to over stoichiometric conditions, is examined and compared with previous experiments. Fluctuations on the characteristic length of unburned eddies are found to be essential to simulate the cycle-to-cycle heat release variations and recover experimental results. A non-linear analysis of the system is performed. It is remarkable that at equivalence ratios around φ≃0.65, embedding and surrogate procedures show that the dimensionality of the system is small.",

keywords = "Cycle-to-cycle variability, Non-linear dynamics, Quasi-dimensional simulations, Spark ignition engines",

author = "Curto-Risso, {P. L.} and A. Medina and {Calvo Hern{\'a}ndez}, A. and L. Guzm{\'a}n-Vargas and F. Angulo-Brown",

note = "Funding Information: Authors acknowledge financial support from Junta de Castilla y Le{\'o}n under Grant SA054A08 and MICINN under Grant FIS2010-17147 . P.L.C.-R. acknowledges a pre-doctoral grant from Grupo Santander-Universidad de Salamanca. L.G.-V. and F.A.-B. thank COFAA-IPN, EDI-IPN and Conacyt (49128-26020), M{\'e}xico.",

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doi = "10.1016/j.apenergy.2010.11.030",

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AU - Medina, A.

AU - Calvo Hernández, A.

AU - Guzmán-Vargas, L.

AU - Angulo-Brown, F.

N1 - Funding Information: Authors acknowledge financial support from Junta de Castilla y León under Grant SA054A08 and MICINN under Grant FIS2010-17147 . P.L.C.-R. acknowledges a pre-doctoral grant from Grupo Santander-Universidad de Salamanca. L.G.-V. and F.A.-B. thank COFAA-IPN, EDI-IPN and Conacyt (49128-26020), México.

PY - 2011/5

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N2 - The cycle-by-cycle variations in heat release are analyzed by means of a quasi-dimensional computer simulation and a turbulent combustion model. The influence of some basic combustion parameters with a clear physical meaning is investigated: the characteristic length of the unburned eddies entrained within the flame front, a characteristic turbulent speed, and the location of the ignition kernel. The evolution of the simulated time series with the fuel-air equivalence ratio, φ, from lean mixtures to over stoichiometric conditions, is examined and compared with previous experiments. Fluctuations on the characteristic length of unburned eddies are found to be essential to simulate the cycle-to-cycle heat release variations and recover experimental results. A non-linear analysis of the system is performed. It is remarkable that at equivalence ratios around φ≃0.65, embedding and surrogate procedures show that the dimensionality of the system is small.

AB - The cycle-by-cycle variations in heat release are analyzed by means of a quasi-dimensional computer simulation and a turbulent combustion model. The influence of some basic combustion parameters with a clear physical meaning is investigated: the characteristic length of the unburned eddies entrained within the flame front, a characteristic turbulent speed, and the location of the ignition kernel. The evolution of the simulated time series with the fuel-air equivalence ratio, φ, from lean mixtures to over stoichiometric conditions, is examined and compared with previous experiments. Fluctuations on the characteristic length of unburned eddies are found to be essential to simulate the cycle-to-cycle heat release variations and recover experimental results. A non-linear analysis of the system is performed. It is remarkable that at equivalence ratios around φ≃0.65, embedding and surrogate procedures show that the dimensionality of the system is small.

KW - Cycle-to-cycle variability

KW - Non-linear dynamics

KW - Quasi-dimensional simulations

KW - Spark ignition engines

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DO - 10.1016/j.apenergy.2010.11.030

M3 - Artículo

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JO - Applied Energy

JF - Applied Energy

IS - 5

ER -

On cycle-to-cycle heat release variations in a simulated spark ignition heat engine

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Keywords

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