A Transient Spray Mixing Model for Diesel Combustion

Chiu, W. S.; Shahed, S. M.; Lyn, W. T.

doi:10.4271/760128

Cited by 103 publications

(22 citation statements)

References 11 publications

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“…Nishida et al (1989) extended their previous work (Hiroyasu et al, 1976) to a simplified three dimensional model by dividing the cylinder chamber into many computational cells to consider the in-cylinder flow. However, these previous phenomenological combustion models (Hiroyasu et al, 1976;Chiu et al, 1976;Kono et al, 1985;Nishida et ai, 1989;Xiaobin et ai, 1995;Rosli et ai, 1997;Chae et al, 1996) leave room for further improvement with respect to the physical submodels and validation of their results for different engine types and operating conditions. In this work the phenomenological multi-zone combustion model of Hiroyasu et al (1976) is implemented in its own form and in a form combined with the in-cylinder flow model for comparison with the test bed data of a turbocharged 01 diesel engine.…”

Section: Introductionmentioning

confidence: 99%

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Phenomenological combustion modeling of a direct injection diesel engine with in-cylinder flow effects

Huh

2000

KSME International Journal

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A cycle simulation program is developed and its predictions are compared with the test bed measurements of a direct injection (01) diesel engine. It is based on the mass and energy conservation equations with phenomenological models for diesel combustion. Two modeling approaches for combustion have been tested; a multi-zone model by Hiroyasu et al (1976) and the other one coupled with an in-cylinder flow model. The results of the two combustion models are compared with the measured imep, pressure trace and NOx and soot emissions over a range of the engine loads and speeds. A parametric study is performed for the fuel injection timing and pressure, the swirl ratio, and the squish area. The calculation results agree with the measured data, and with intuitive understanding of the general operating characteristics of a 01 diesel engine.

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Section: Introductionmentioning

confidence: 99%

“…In Chiu et al (1976) the fuel spray is modeled as a vapor jet by assuming a supercritical state under normal operating conditions. The fuel vapor concentration distribution is described by appropriate analytical functions from the nozzle exit.…”

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confidence: 99%

Phenomenological combustion modeling of a direct injection diesel engine with in-cylinder flow effects

Huh

2000

KSME International Journal

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“…One example is shown in Figure 1. This schematic is reproduced from Chiu (27). It is typical of the types of models developed by various researchers in the 1970s when computational capabilities limited the complexity of models that could be manipulated.…”

Section: Diesel Flame Structurementioning

confidence: 99%

Diesel Combustion: An Integrated View Combining Laser Diagnostics, Chemical Kinetics, And Empirical Validation

Flynn

Durrett

Hunter

et al. 1999

SAE Technical Paper Series

330

201

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February 1999This is a preprint of a paper intended for publication in a journal or proceedings. Since changes may be made before publication, this preprint is made available with the understanding that it will not be cited or reproduced without the permission of the author. PREPRINTThis paper was prepared for submittal to the DISCLAIMER This document was prepared as an account of work sponsored by an agency of the United States Government. Neither the United States Government nor the University of California nor any of their employees, makes any warranty, express or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed, or represents that its use would not infringe privately owned rights. Reference herein to any specific commercial product, process, or service by trade name, trademark, manufacturer, or otherwise, does not necessarily constitute or imply its endorsement, recommendation, or favoring by the United States Government or the University of California. The views and opinions of authors expressed herein do not necessarily state or reflect those of the United States Government or the University of California, and shall not be used for advertising or product endorsement purposes. 1999-01- Charles K. WestbrookLawrence Livermore National Laboratory ABSTRACT This paper proposes a structure for the diesel combustion process based on a combination of previously published and new results. Processes are analyzed with proven chemical kinetic models and validated with data from production-like direct injection diesel engines. The analysis provides new insight into the ignition and particulate formation processes, which combined with laser diagnostics, delineates the twostage nature of combustion in diesel engines. Data are presented to quantify events occurring during the ignition and initial combustion processes that form soot precursors.A framework is also proposed for understanding the heat release and emission formation processes.

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“…As results of many years of hard research, varieties of spray mixing models of diesel engine have developed, such as fuel droplets evaporation model proposed by Hiroyasu firstly [1][2][3][4], transient gaseous flow model proposed by Lyn firstly [5][6] and two-phase flow model proposed by Jin [7][8][9]. In the fuel droplets evaporation, it assumed that the combustion is controlled by the fuel droplets evaporation considering the fuel atomization and gasification processes.…”

Section: Introductionmentioning

confidence: 99%

A New Spray Mixing Model of Quasi-Dimensional Model for Diesel Engine Working Process

Qi¹,

Long²,

Hu³

2015

Proceedings of the International Conference on Advances in Energy, Environment and Chemical Engineering

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Abstract. In order to satisfy the validity demand of quasi-dimensional combustion model for predicting diesel engine performance, a new phase-divided spray mixing model is proposed in this work. The software MATLAB/Simulink is utilized to build the quasi-dimensional combustion model of diesel engine working process, and the performance for diesel engine is simulated. The comparisons between calculated results and experimental data show that the relative error of power and brake specific fuel consumption is less than 2.3%, and the relative error of nitric oxide and soot emissions is less than 5.8%. The good agreement between experimental results and calculated results indicates that the quasi-dimensional model of diesel engine working process which is based on the phase-divided spray mixing model is reliable for predicting power, fuel consumption and emissions of diesel engine.

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A Transient Spray Mixing Model for Diesel Combustion

Cited by 103 publications

References 11 publications

Phenomenological combustion modeling of a direct injection diesel engine with in-cylinder flow effects

Phenomenological combustion modeling of a direct injection diesel engine with in-cylinder flow effects

Diesel Combustion: An Integrated View Combining Laser Diagnostics, Chemical Kinetics, And Empirical Validation

A New Spray Mixing Model of Quasi-Dimensional Model for Diesel Engine Working Process

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