This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
A Study on Prediction of Unburned Hydrocarbons in Active Pre-chamber Gas Engine: Combustion Analysis Using 3D-CFD by Considering Wall Quenching Effects
Technical Paper
2021-24-0049
ISSN: 0148-7191, e-ISSN: 2688-3627
This content contains downloadable datasets
Annotation ability available
Sector:
Language:
English
Abstract
To reproduce wall quenching phenomena using 3D-CFD, a wall quenching model was constructed based on the Peclet number. The model was further integrated with the flame propagation model. Combustion analysis showed that that a large amount of unburned hydrocarbons (UHCs) remained in the piston clevis and small gaps. Furthermore, the model was capable of predicting the increase in UHC emissions when there was a delay in the ignition time. The flame front cells were plotted on Peters' premixed turbulent combustion diagram to identify transitions in the combustion states. It was found that the flame surface transitioned from corrugated flamelets through thin reaction zones to wrinkled flamelets and further to laminar flamelets, which led to wall quenching. The turbulent Reynolds number (Re) decreased rapidly due to the increase in laminar flame speed and flame thickness and the decrease in turbulent intensity and turbulent scale. When Re < 10, the model showed that there was a sharp increase in wall quenching. In addition, wall quenching occurred when the dimensionless wall distance was less than 40 (y+ < 40) at any timing.
Recommended Content
Authors
Topic
Citation
Shota, T., Kato, T., Sudo, Z., ZHOU, B. et al., "A Study on Prediction of Unburned Hydrocarbons in Active Pre-chamber Gas Engine: Combustion Analysis Using 3D-CFD by Considering Wall Quenching Effects," SAE Technical Paper 2021-24-0049, 2021, https://doi.org/10.4271/2021-24-0049.Data Sets - Support Documents
Title | Description | Download |
---|---|---|
Unnamed Dataset 1 | ||
Unnamed Dataset 2 | ||
Unnamed Dataset 3 | ||
Unnamed Dataset 4 |
Also In
References
- Kawanabe , H. , Shioji , M. , and Tsunooka , T. Wall-quenching Model in a CFD Simulation of Engine Combustion Transactions of the Japan Society of Mechanical Engineers. B 69 686 2003 2363 2367
- Weller , H. , Uslu , S. , Gosman , A. , Maly , R. et al. Prediction of Combustion in Homogeneous-Charge Spark-Ignition Engines International Symposium COMODIA 94 1994 163 169
- Taraji , A. , Tsuda , T. , Noda , T. , Kobo , T. et al. Prediction of Unburned HCs by Using Three-Dimensional Combustion Simulation in Spark Ignition Engines Journal of the Combustion Society of Japan 49 147 2007 70 76
- Poinsot , T. and Veynante , D. Theoretical and Numerical Combustion 2nd Philadelphia R.T. Edwards 2005
- Hernández , I. , Shapiro , E. , Tiney , N. , Kotzagianni , M. et al. Flame-Wall Interaction Modelling for Pre-chamber Combustion in Lean Burn Gas Engines International CAE Conference and Exhibition 2018
- Lavoie , G. Correlations of Combustion Data for S. I. Engine Calculations - Laminar Flame Speed, Quench Distance and Global Reaction Rates SAE Technical Paper 780229 1978 https://doi.org/10.4271/780229
- Lu , T.F. and Law , C.K. A Criterion Based on Computational Singular Perturbation for the Identification of Quasi Steady State Species: A Reduced Mechanism for Methane Oxidation with NO Chemistry Combustion and Flame 154 4 2008 761 774
- Senecal , P. , Pomraning , E. , Richards , K. , Briggs , T. et al. Multi-Dimensional Modeling of Direct-Injection Diesel Spray Liquid Length and Flame Lift-off Length using CFD and Parallel Detailed Chemistry SAE Technical Paper 2003-01-1043 2003 https://doi.org/10.4271/2003-01-1043
- Turns , S.R. An Introduction to Combustion McGraw-Hill, Inc. 1996
- Peters , N. Turbulent Combustion Cambridge University Press 2000
- Rahim , F. , Elia , M. , Ulinski , M. , and Metghalchi , M. Burning Velocity Measurements of Methane-Oxygen-Argon Mixtures and an Application to Extend Methane-Air Burning Velocity Measurements International Journal of Engine Research 3 2 2002 81 92
- Suckart , D. and Linse , D. Modelling Turbulent Premixed Flame-Wall Interactions Including Flame Quenching and Near-Wall Turbulence Based on a Level-Set Flamelet Approach Combustion and Flame 190 2018 50 64
- Poinsot , T.J. , Veynante , D. , and Candel , S. Diagrams of Premixed Turbulent Combustion Based on Direct Simulation Twenty-Third Symposium (International) on Combustion 613 619 1990