Semi-Predictive Modeling of Diluted Ethanol and Methanol Combustion
                    in Conventional Spark Ignition Operation

Mahendar, Senthil Krishnan; Erlandsson, Anders Christiansen

doi:10.4271/2021-01-0386

Cited by 5 publications

(8 citation statements)

References 28 publications

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“…where C s,λ=1 is the turbulent flame speed multiplier at stoichiometric condition. The dilution factor λ M together with C s , C s,λ=1 , and the kernel grow multiplier C k were optimized by a genetic algorithm to fit the measurement data (Mahendar and Erlandsson, 2021). Since the combustion chamber has been divided into the unburned and burned zones, the convective heat transfer rate for each zone (Lounici et al, 2011) can be written as follows:…”

Section: Sub-model: Flame Developmentmentioning

confidence: 99%

“…where ON is the octane number as the average of RON and motor octane number (MON). Since the ignition time delay increases due to the dilution effect (Sok et al, 2019), the coefficient M1 = 7.36λ − 5.79 is modified to represent the dilution effect of ethanol combustion, while M2 = 1 remains as the model default value (Mahendar and Erlandsson, 2021).…”

Section: Sub-model: Knock Integralmentioning

confidence: 99%

“…The predictive combustion model was calibrated for leanburn operations up to excess air ratio λ = 1.8. The calibration was conducted in GT-Power by using Three Pressure Analysis (Mahendar and Erlandsson, 2021). Besides the cylinder pressure traces, the crank angle-resolved pressure measurement at the intake and the exhaust were used to capture the volumetric efficiency and residual fraction.…”

Section: Engine Simulationmentioning

confidence: 99%

See 2 more Smart Citations

Energy and Exergy Characteristics of an Ethanol-Fueled Heavy-Duty Si Engine at High-Load Operation Using Lean-Burn Combustion

Hong¹,

Lius²,

Mahendar³

et al. 2022

SSRN Journal

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Section: Sub-model: Flame Developmentmentioning

confidence: 99%

Section: Sub-model: Knock Integralmentioning

confidence: 99%

Section: Engine Simulationmentioning

confidence: 99%

See 1 more Smart Citation

Energy and Exergy Characteristics of an Ethanol-Fueled Heavy-Duty Si Engine at High-Load Operation Using Lean-Burn Combustion

Hong¹,

Lius²,

Mahendar³

et al. 2022

SSRN Journal

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“…It was shown that this correlation estimates the LBV much better than the traditional correlation that was designed mostly for gasoline, diesel or their surrogates [19]. Hence this correlation will be used in this study.…”

Section: Laminar Burning Velocitymentioning

confidence: 99%

Integration and Validation of a Quasi-Dimensional Modelling Methodology and Application to Light-Duty and Heavy-Duty Methanol-Fueled Spark-Ignited Engines

Pu¹,

Verhelst²

2022

SAE Technical Paper Series

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To speed up the development of the next-generation combustion engines with renewable fuels, the importance of reliable and robust simulations cannot be overemphasized. Compared to gasoline, methanol is a promising fuel for spark-ignited engines due to its higher research octane number to resist auto-ignition, higher flame speed for faster combustion and higher heat of vaporization for intake charge cooling. These advantageous properties all contribute to higher thermal efficiency and lower knock tendency, and they need to be well-captured in the simulation environment in order to generate accurate predictions. In this paper, the sub-models which estimate the burning velocities and ignition delay of methanol are revisited. These building blocks are implemented and integrated in a quasidimensional simulation environment to predict the combustion behavior, which are subsequently validated against test data measured on both light-duty and heavy-duty engines. The light-duty application is represented by a spark advance sweep on a CFR engine with compression ratios ranging from 9 to 11 and lambda ranging from 0.7 to 1.3. The heavy-duty application is represented by a sweep of the indicated mean effective pressure on a Scania D12 engine from 13 to 26 bar with boost levels from 50 mbar to 1.5 bar and lambda from 1 to 1.8. The calibration results of the model for both applications are compared and discussed. The simulation results show that the current methodology works well with the light-duty application but extra work on the burning velocity sub-model is required to better capture the combustion behavior in heavy-duty applications.

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“…This fit was tested on additional points and was found to be within 3 CAD error in knock limited CA50. More details on the combustion and knock model development are available in [ 45 ].…”

Section: Combustion and Knock Modelmentioning

confidence: 99%

The Impact of Miller Valve Timing on Combustion and Charging Performance of an Ethanol- and Methanol-Fueled Heavy-Duty Spark Ignition Engine

Mahendar

Venkataraman

Erlandsson³

2021

SAE Int. J. Engines

Self Cite

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show abstract

Semi-Predictive Modeling of Diluted Ethanol and Methanol Combustion in Conventional Spark Ignition Operation

Cited by 5 publications

References 28 publications

Energy and Exergy Characteristics of an Ethanol-Fueled Heavy-Duty Si Engine at High-Load Operation Using Lean-Burn Combustion

Energy and Exergy Characteristics of an Ethanol-Fueled Heavy-Duty Si Engine at High-Load Operation Using Lean-Burn Combustion

Integration and Validation of a Quasi-Dimensional Modelling Methodology and Application to Light-Duty and Heavy-Duty Methanol-Fueled Spark-Ignited Engines

The Impact of Miller Valve Timing on Combustion and Charging Performance of an Ethanol- and Methanol-Fueled Heavy-Duty Spark Ignition Engine

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