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A Wall-Modified Flamelet Model for Diesel Combustion
Technical Paper
2004-01-0103
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
In this paper, a wall-modified interactive flamelet model is developed for improving the modeling of Diesel combustion. The objective is to include the effects of wall heat loss on the transient flame structure. The essential idea is to compute several flamelets with several representative enthalpy defects which account for wall heat loss. Then, the averaged flamelet profile can be obtained through a linear fit between the flamelets according to the enthalpy defect of the local gas which results from the wall heat loss. The enthalpy defect is estimated as the difference between the enthalpy in a flamelet without wall heat loss, which would correspond to the enthalpy in the gas without wall heat loss, and the gas with wall heat loss. The improved model is applied to model combustion in a Diesel engine. In the application, two flamelets, one without wall heat loss and one with wall heat loss, are considered. Results are shown from computations for the cases without heat loss and with wall heat loss in the flamelet. Effects of spray angle on engine emissions are investigated. The computed emissions from the engine for different spray angles are compared to measurements. It is shown that the wall-modified interactive flamelet model is able to reproduce the trends more accurately.
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Citation
Song, L. and Abraham, J., "A Wall-Modified Flamelet Model for Diesel Combustion," SAE Technical Paper 2004-01-0103, 2004, https://doi.org/10.4271/2004-01-0103.Also In
Modelling: Diesel Engines, Multi-Dimensional Engine, and Vehicle and Engine Systems
Number: SP-1826; Published: 2004-03-08
Number: SP-1826; Published: 2004-03-08
References
- Dec, J. E. Tree, D. R. 2001 “Diffusion-Flame/Wall Interactions in a Heavy-Duty DI Diesel Engine” SAE Paper 2001-01-1295
- Fenimore, C. P. Jones, G. W. 1967 “Oxidation of Soot by Hydroxyl Radicals J. Physical Chemistry 71 593 597
- Golovichev, V. 2002 Mechanism for c7h16 http://www.tfd.chalmers.se/∼valeri/MECH.html
- Gopalakrishnan, V. Abraham, J. 2003 “An Investigation of Ignition and Heat Release Characteristics in a Diesel Engine Using An Interactive Flamelet Model,” SAE Paper 2003-01-1062
- Gopalakrishnan, V. Abraham, J. 2002 “An Investigation of Ignition Behavior in Diesel Sprays,” Proc. Combustion Institute 29 641 646
- Gopalakrishnan, V. Abraham, J. Magi, V. 2002 “A Comparison of Mixing-Controlled and Flamelet Models for Diesel Combustion,” SAE Paper 2002-01-1116
- Hergart, C. Barths, H. Peters, N. 2000 “Using Representative Interactive Flamlets in Three-Dimensional Modeling of the Diesel Combustion Process Including Effects of Heat Transfer,” 10th International Multidimensional Engine Modeling User's Group Meeting Detroit, Michigan
- Hergart, C. Peters, N. 2002 “Applying the Representative Interactive Flamelet Model to Evaluate the Potential Effect of Wall Heat Transfer on Soot Emissions in a Small-Bore Direct-Injection Diesel Engine,” J. Engineering for Gas Turbines and Power 124 4 1042 1052
- Kittelson, D.B. Ambs, J.L. Hadjkacem, H. 1990 “Particulate Emissions from Diesel Engines-Influence of In-Cylinder Surface,” SAE Transactions 99 1457 1472
- Magi, V. 1987 “A New 3-D Code for Flows, Sprays, and Combustion in Reciprocating and Rotary Engines,” Mechanical and Aerospace Engineering Report Princeton University
- Moss, J. B. Stewart, C. D. Young, K. J. 1995 “Modeling Soot Formation and Burnout in a High Temperature Laminar Diffusion Flame Burning under Oxygen-Enriched Conditions,” Combustion and. Flame 101 491 500
- Nagle, J. Strickland-Constable, R. F. 1962 “Oxidation of Carbon between 1000-2000 °C,” Proceedings of the Fifth Carbon Conference 1 154 Pergamon Press
- Peters, N. 1984 “Laminar Flamelet Concepts in Turbulent Combustion,” Progress in Energy and Combustion Science 10 319 339
- Pitsch, H. Barths, H. Peters, N. 1996 “Three Dimensional Modeling of Nox and Soot Formation in DI-Diesel Engines Using Detailed Chemistry Based on the Interactive Flamelet Approach,” SAE Paper 962057
- Song, L. Abraham, J. 2001 “Effect of Injector Hole Size, Number and Orientation on Diesel Engine Emissions,” Proceedings of the 2nd Joint Meeting of the U.S. Sections of the Combustion Institute Oakland, California
- Song, L. Abraham, J. 2003 “Entrainment Characteristics of Round, Radial and Wall-Impinging Jets: Theoretical Deductions” J. Fluids Engineering
- Song, L. Abraham, J. 2003 “Influence of Wall Impingement on the Structure of Reacting Jets,” SAE Paper 2003-01-1042
- Song, L. Abraham, J. 2003 “Soot Distribution in a Reacting Wall-Impinging Jet,” Combustion Science and Technology
- Song, L. Abraham, J. 2003 “The Structure of Wall-Impinging Jets: Computed vs. Theoretical and Measured Results,” J. Fluids Engineering
- Tree, D.R. Dec J.E. 2001 “Extinction Measurements of In-Cylinder Soot Deposition in a Heavy-Duty DI Diesel Engines” SAE Paper 2001-01-1296
- Venkatesan, C.P. Abraham, J. 2000 “An Investigation of the Dependence of NO and Soot Emissions from a Diesel Engine on Heat Release Rate Characteristics,” SAE Paper 2000-01-0509