Using a phenomenological computer model to investigate advanced combustion trajectories in a CIDI engine

Z. Gao; R. M. Wagner; C. S. Sluder; C. S. Daw; J. B. Green

doi:10.1016/j.fuel.2010.12.030

Using a phenomenological computer model to investigate advanced combustion trajectories in a CIDI engine

Z. Gao, R. M. Wagner, C. S. Sluder, C. S. Daw, J. B. Green

Research output: Contribution to journal › Article › peer-review

19 Scopus citations

Abstract

This paper summarizes results from simulations of conventional, high-dilution, and high-efficiency clean combustion in a diesel engine based on a two-zone phenomenological model. The two-zone combustion model is derived from a previously published multi-zone model, but it has been further simplified to increase computational speed by a factor of over 100. The results demonstrate that this simplified model is still able to track key aspects of the combustion trajectory responsible for NO_x and soot production. In particular, the two-zone model in combination with highly simplified global kinetics correctly predicts the importance of including oxygen mass fraction (in addition to equivalence ratio and temperature) in lowering emissions from high-efficiency clean combustion. The methodology also provides a convenient framework for extracting information directly from in-cylinder pressure measurements. This feature is likely to be useful for on-board combustion diagnostics and controls. Because of the possibility for simulating large numbers of engine cycles in a short time, models of this type can provide insight into multi-cycle and transient combustion behavior not readily accessible to more computationally intensive models. Also the representation of the combustion trajectory in 3D space corresponding to equivalence ratio, flame temperature, and oxygen fraction provides new insight into optimal combustion management.

Original language	English
Pages (from-to)	1907-1918
Number of pages	12
Journal	Fuel
Volume	90
Issue number	5
DOIs	https://doi.org/10.1016/j.fuel.2010.12.030
State	Published - May 2011

Funding

This work was performed at Oak Ridge National Laboratory, which is managed by UT-Battelle LLC. The work was also sponsored by ORAU/ORISE. The authors are grateful to Dr. Tom Briggs and Dr. Charles Finney, at ORNL, who contributed very helpful suggestions and insights to this effort. Thanks are also owed to the reviewers for their time and helpful comments. Notice : This submission was sponsored by a contractor of the United States Government under Contract DE-AC05-00OR22725 with the United States Department of Energy. The United States Government retains, and the publisher, by accepting this submission for publication, acknowledges that the United States Government retains, a nonexclusive, paid-up, irrevocable, worldwide license to publish or reproduce the published form of this submission, or allow others to do so, for United States Government purposes.

Keywords

Combustion trajectory
Diesel
Emissions
High-efficiency clean combustion
Phenomenological model

Access to Document

10.1016/j.fuel.2010.12.030

Cite this

@article{22adac25f75c4655a8c21e43b012484e,

title = "Using a phenomenological computer model to investigate advanced combustion trajectories in a CIDI engine",

abstract = "This paper summarizes results from simulations of conventional, high-dilution, and high-efficiency clean combustion in a diesel engine based on a two-zone phenomenological model. The two-zone combustion model is derived from a previously published multi-zone model, but it has been further simplified to increase computational speed by a factor of over 100. The results demonstrate that this simplified model is still able to track key aspects of the combustion trajectory responsible for NOx and soot production. In particular, the two-zone model in combination with highly simplified global kinetics correctly predicts the importance of including oxygen mass fraction (in addition to equivalence ratio and temperature) in lowering emissions from high-efficiency clean combustion. The methodology also provides a convenient framework for extracting information directly from in-cylinder pressure measurements. This feature is likely to be useful for on-board combustion diagnostics and controls. Because of the possibility for simulating large numbers of engine cycles in a short time, models of this type can provide insight into multi-cycle and transient combustion behavior not readily accessible to more computationally intensive models. Also the representation of the combustion trajectory in 3D space corresponding to equivalence ratio, flame temperature, and oxygen fraction provides new insight into optimal combustion management.",

keywords = "Combustion trajectory, Diesel, Emissions, High-efficiency clean combustion, Phenomenological model",

author = "Z. Gao and Wagner, {R. M.} and Sluder, {C. S.} and Daw, {C. S.} and Green, {J. B.}",

year = "2011",

month = may,

doi = "10.1016/j.fuel.2010.12.030",

language = "English",

volume = "90",

pages = "1907--1918",

journal = "Fuel",

issn = "0016-2361",

publisher = "Elsevier",

number = "5",

}

TY - JOUR

T1 - Using a phenomenological computer model to investigate advanced combustion trajectories in a CIDI engine

AU - Gao, Z.

AU - Wagner, R. M.

AU - Sluder, C. S.

AU - Daw, C. S.

AU - Green, J. B.

PY - 2011/5

Y1 - 2011/5

N2 - This paper summarizes results from simulations of conventional, high-dilution, and high-efficiency clean combustion in a diesel engine based on a two-zone phenomenological model. The two-zone combustion model is derived from a previously published multi-zone model, but it has been further simplified to increase computational speed by a factor of over 100. The results demonstrate that this simplified model is still able to track key aspects of the combustion trajectory responsible for NOx and soot production. In particular, the two-zone model in combination with highly simplified global kinetics correctly predicts the importance of including oxygen mass fraction (in addition to equivalence ratio and temperature) in lowering emissions from high-efficiency clean combustion. The methodology also provides a convenient framework for extracting information directly from in-cylinder pressure measurements. This feature is likely to be useful for on-board combustion diagnostics and controls. Because of the possibility for simulating large numbers of engine cycles in a short time, models of this type can provide insight into multi-cycle and transient combustion behavior not readily accessible to more computationally intensive models. Also the representation of the combustion trajectory in 3D space corresponding to equivalence ratio, flame temperature, and oxygen fraction provides new insight into optimal combustion management.

AB - This paper summarizes results from simulations of conventional, high-dilution, and high-efficiency clean combustion in a diesel engine based on a two-zone phenomenological model. The two-zone combustion model is derived from a previously published multi-zone model, but it has been further simplified to increase computational speed by a factor of over 100. The results demonstrate that this simplified model is still able to track key aspects of the combustion trajectory responsible for NOx and soot production. In particular, the two-zone model in combination with highly simplified global kinetics correctly predicts the importance of including oxygen mass fraction (in addition to equivalence ratio and temperature) in lowering emissions from high-efficiency clean combustion. The methodology also provides a convenient framework for extracting information directly from in-cylinder pressure measurements. This feature is likely to be useful for on-board combustion diagnostics and controls. Because of the possibility for simulating large numbers of engine cycles in a short time, models of this type can provide insight into multi-cycle and transient combustion behavior not readily accessible to more computationally intensive models. Also the representation of the combustion trajectory in 3D space corresponding to equivalence ratio, flame temperature, and oxygen fraction provides new insight into optimal combustion management.

KW - Combustion trajectory

KW - Diesel

KW - Emissions

KW - High-efficiency clean combustion

KW - Phenomenological model

UR - http://www.scopus.com/inward/record.url?scp=79952534786&partnerID=8YFLogxK

U2 - 10.1016/j.fuel.2010.12.030

DO - 10.1016/j.fuel.2010.12.030

M3 - Article

AN - SCOPUS:79952534786

SN - 0016-2361

VL - 90

SP - 1907

EP - 1918

JO - Fuel

JF - Fuel

IS - 5

ER -

Using a phenomenological computer model to investigate advanced combustion trajectories in a CIDI engine

Abstract

Funding

Keywords

Access to Document

Other files and links

Fingerprint

Cite this