This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Phenomenological Scavenge-Combustion Model for Two Stroke Cycle S I Engine
Annotation ability available
Sector:
Language:
English
Abstract
A simulation model for crankcase scavenged 2-stroke cycle SI engine has been developed to predict the performance and scavenging characteristics. A suitable coupling of scavenging and combustion processes has been achieved to enable these predictions.
Scavenging process has been analysed through a 3-phase, that is, displacement, short circuiting and mixing, model capable of taking any combination of these phases. The flow of fresh charge in the exhaust during mixing period is modeled based on ‘S’ shape concept. The back flow through the ports is also considered.
The combustion analysis uses quasi-dimensional eddy entrainment concept that includes the basic turbulent parameters.
The results concerning the combination of displacement, short circuiting and mixing phases are analysed to judge the scavenging characteristics of the enginefrom its overall parameters. The predictions of cylinder pressure time history at different speeds, equivalence ratios and compression ratios are made. A comparison with experimental results is also made. The predicted and experimental results show good agreement.
Authors
Topic
Citation
Malik, K., Mehta, P., and Gupta, C., "Phenomenological Scavenge-Combustion Model for Two Stroke Cycle S I Engine," SAE Technical Paper 881268, 1988, https://doi.org/10.4271/881268.Also In
References
- Kollman R E Lestz S S Meyer W E Exhaust Emission Characteristics of a Small 2-Stroke Spark Ignition Engine SAE Paper No 730159 1973
- Benson R S Brandham P T A Method for Obtaining a Quantitative Assessment of the Influence of Charging Efficiency on Two Stroke Engine Performance Int J Mech Sci 11 1969
- Benson R S A New Gas Dynamic Model for the Gas Exchange Process in Two Stroke Loop and Cross Scavenged Engines Int J Mech Sci 19 1977
- Dedeoglu N Scavenging Model Solves Problem in Gas Burning Engine SAE Paper No 710579 1971
- Sher E Prediction of the Gas Exchange Performance in a Two-Stroke Cycle Engine SAE Paper No 850086 1985
- Sweeney M E G Swann G B G Kenny R G Blair G P Computational Fluid Dynamics Applied to Two-Stroke Engine Scavenging SAE Paper No 851519 1985
- Sher E A New Practical Model for the Scavenging Process in a Two-Stroke Cycle Engine SAE Paper No 850085 1985
- Benson R S Baruah P C Whelan B Simulation Model for a Crank-case-Compression Two-Stroke Spark-Ignition Engine Including Intake and Exhaust Systems Proc. Instn Mech Engrs 189 1975
- Blair G P Prediction of Two-Cycle Engine Performance Characteristics SAE Paper No 760645 1976
- Sher E The Effect of Atmospheric Conditions on the Performance of an Air-Borne Two-Stroke Spark-Ignition Engine Proc Instn Mech Engrs 198D 15 1984
- Taylor C F The Internal Combustion Engine in Theory and Practice II MIT Press 1968
- Anand W J D The Estimation of Flame Propagation Rates in Routine Computer Synthesis of Spark-Ignition Combustion 1983
- Deneshyar H Hill P G The Structure of Small-scale Turbulence and its Effect on Combustion in Spark Ignition Engines Prog Energy Combust Sci 13 1987
- Gatowski, J A Heywood J B Deleplace C Flame Photographs in a Spark-Ignition Engine Combustion and Flame 56 1984
- Witze P O The Effect of Spark Location on Combustion in a Variable-Swirl Engine SAE Paper No 820044 1982
- Blizard N C Keck J C Experimental and Theoretical Investigation of Turbulent Burning Model for Internal Combustion Engines SAE Paper No 740191 1974
- Tabaczynski R J Ferguson C R Radhakrishnan K A Turbulent Entrainment Model for Spark-Ignition Combustion SAE Paper No 770647 1977
- Hires S D Tabaczynski R J Novak J M The Prediction of Ignition Delay and Combustion Intervals for a Homogeneous Charge Spark Ignition Engine SAE Paper No 780232 1978
- Tabaczynski R J Trinker F H Shannon B A S Further Refinement and Validation of a Turbulent Flame Propagation Model for Spark Ignition Engines Combustion and Flame 39 1980
- Andrews G E Bradley D Lwakabamba S B Turbulence and Turbulent Flame Propagation - A critical Appraisal Combustion and Flame 24 1975
- Benson R S Annand W J D Baruah P C A Simulation Model Including Intake and Exhaust Systems for a Single Cylinder Four-Stroke Cycle Spark Ignition Engine Int J Mech Sci 17 1975
- Lucas G G James E H A Computer Simulation of a Spark Ignition Engine SAE Paper No 730053 1973
- Glassman I Combustion Academic Press New York 1977
- Heikal M R Benson R S Annand W J D A Model for Turbulent Burning Speed in Spark Ignition Engines I Mech E Conference On Fuel Economy and Emmission of Lean Burn Engines London 1979
- Tennekes H Model for the Small-Scale Structure of Turbulence Physics of Fluids 11 3 1968
- Metghalchi M Keck J C Burning Velocities of Mixtures of Air with Methanol, Isoctane and Indolene at High Pressure and Temperature Combustion and Flame 48 1982
- Ryan T W Lestz S S The Laminar Burning Velocity of Isooctane, N-Heptane, Methanol, Methane and Propane at Elevated Temperature and Pressures in the Presence of a Diluent SAE Paper No 800103 1980
- Gülder Ö L Correlations of Laminar Combustion Data for Alternative S.I. Engine Fuels SAE Paper No 841000 1984
- Annand W J D Heat Transfer in the Cylinders of Reciprocating Internal Combustion Engines Proc Instn Mech Engrs 177 36 1963
- Mansouri S H Heywood J B Correlations for the Viscosity and Prandtl Number of Hydrocarbon-Air Combustion Products Combustion Science and Technology 23 1980
- Reid R C Sherwood T K The Properties of Gases and Liquids McGraw-Hill Book Company New York 1966
- Benson R S The Thermodynamics and Gas Dynamics of Internal Combustion Engines 1 Clarendon Press Oxford 1982
- Sher E
- Blair G P Ashe M C The Unsteady Gas Exchange Characteristics of a Two-Cycle Engine SAE Paper No 760644 1976
- Sanborn D S Paper Powerplants Promote Performance Progress SAE Paper No 750016 1975