A Model of a Direct Injection Diesel Combustion System for Use in Cycle Simulation and Optimization Studies

The objective of the work was to formulate and develop a combustion model for a direct injection diesel engine that would be capable of correctly predicting engine performance and exhaust emissions trends, be sensitive to changes in major combustion system variables, and yet be efficient enough to allow the model to be used in engine cycle simulations and formal mathematical optimization procedures. The model is multizone and is based on the air and fuel mixing process with a temperature and concentration dependent fuel burning rate. Nitric oxide kinetics are also included. The assumptions for the model are discussed in terms of the competing chemical and physical processes and the resulting implications for the level of complexity and detail required to meet the objectives of the work. The model predicts the spatially and temporally resolved temperatures and concentrations, as well as the bulk cylinder variables; including pressure, temperature, heat transfer, and nitric oxide mass emissions.

[1]  K. A. Troth,et al.  Penetration and Vaporization of Diesel Fuel Sprays , 1969 .

[2]  W-T. Lyn,et al.  The Evaporation and Mixing of a Liquid Fuel Spray in a Diesel Air Swirl , 1969 .

[3]  Elaine S. Oran,et al.  Detailed modelling of combustion systems , 1981 .

[4]  H. Hiroyasu,et al.  Models for combustion and formation of nitric oxide and soot in direct injection diesel engines. SAE Paper 760129 , 1976 .

[5]  H. Hiroyasu,et al.  Development and Use of a Spray Combustion Modeling to Predict Diesel Engine Efficiency and Pollutant Emissions : Part 1 Combustion Modeling , 1983 .

[6]  G. M. Cornetti,et al.  Optimum Air Momentum and Spray Formation for D.I. Diesel , 1985 .

[7]  J. C. Dent.  A basis for the comparison of various experimental methods for studying spray penetration. , 1971 .

[8]  R. B. Melton.  Diesel Fuel Injection Viewed as a Jet Phenomenon , 1971 .

[9]  G. Woschni.  A Universally Applicable Equation for the Instantaneous Heat Transfer Coefficient in the Internal Combustion Engine , 1967 .

[10]  T. J. Williams,et al.  Parameters for Correlation of Penetration Results for Diesel Fuel Sprays , 1973 .

[11]  M. Glauert.  The wall jet , 1956, Journal of Fluid Mechanics.

[12]  John B. Heywood,et al.  Photographic and Performance Studies of Diesel Combustion With a Rapid Compression Machine , 1974 .

[13]  S. M. Shahed,et al.  A Numerical Study of the Transient Evaporating Spray Mixing Process in the Diesel Environment , 1983 .

[14]  J. H. Whitelaw,et al.  A Round Jet Normal to a Crossflow , 1981 .

[15]  W. S. Chiu,et al.  A Preliminary Model for the Formation of Nitric Oxide in Direct Injection Diesel Engines and Its Application in Parametric Studies , 1973 .

[16]  F. V. Bracco,et al.  On the Scaling of Transient Laminar, Turbulent, and Spray Jets , 1982 .

[17]  John B. Heywood,et al.  Engine Combustion Modeling—An Overview , 1980 .

[18]  A. Chraplyvy,et al.  Diagnostic Measurements of Fuel Spray Dispersion , 1980 .

[19]  M. H. Syed,et al.  The Problem of Predicting Rate of Heat Release in Diesel Engines , 1969 .

[20]  William H. Lipkea,et al.  The relationship between nitric oxide and work as influenced by engine operating conditions and combustion system parameters for a direct injection diesel engine , 1987 .

[21]  N. D. Whitehouse,et al.  Investigation into Some Aspects of the Computation of Diesel Engine Combustion , 1976 .

[22]  W. J. D. Annand,et al.  Heat Transfer in the Cylinders of Reciprocating Internal Combustion Engines , 1963 .

[23]  C. Westbrook,et al.  Simplified Reaction Mechanisms for the Oxidation of Hydrocarbon Fuels in Flames , 1981 .

[24]  Reijiro Tsuneya,et al.  Studies on the Penetration of Fuel Spray in a Diesel Engine , 1959 .

[25]  D. D. Drysdale,et al.  Evaluated kinetic data for high temperature reactions , 1972 .

[26]  C. J. Morris,et al.  The Simulation of Air Fuel Mixing in High Swirl Open Chamber Diesel Engines , 1976 .

[27]  K. Schofield.  An evaluation of kinetic rate data for reactions of neutrals of atmospheric interest , 1967 .

[28]  A. K. Oppenheim,et al.  Induction period for ignition of fuel sprays at high temperatures and pressures , 1985 .

[29]  F. Bracco.  Modeling of engine sprays , 1985 .

[30]  W. S. Chiu,et al.  A TRANSIENT SPRAY MIXING MODEL FOR DIESEL COMBUSTION , 1976 .

[31]  T. W. Kuo,et al.  Modeling of Transient Evaporating Spray Mixing Processes-Effect of Injection Characteristics , 1984 .

[32]  F. Bracco.  Nitric oxide formation in droplet diffusion flames , 1973 .

[33]  A. E. W. Austen,et al.  Some Steps Toward Calculating Diesel Engine Behavior , 1962 .

[34]  Gary L. Borman,et al.  Parametric Studies Using a Mathematically Simulated Diesel Engine Cycle , 1967 .

[35]  John A. Derham,et al.  Air Motion in a Four-Stroke Direct Injection Diesel Engine , 1974 .

[36]  Hugh M. Spencer.  Empirical Heat Capacity Equations of Gases and Graphite , 1948 .

[37]  F. Lockwood,et al.  Consideration of the Problem of Combustion Modelling for Engineering Applications , 1979 .

[38]  W. Baines,et al.  The round turbulent jet in a cross-wind , 1963, Journal of Fluid Mechanics.

[39]  J. A. Newman,et al.  Behavior of a Liquid Jet near the Thermodynamic Critical Region , 1971 .

[40]  N. D. Whitehouse,et al.  Prediction of Heat Release in a Quiescent Chamber Diesel Engine Allowing for Fuel/Air Mixing , 1974 .