Impact analysis of partially premixed combustion strategy on the emissions of a compression ignition engine fueled with higher octane number fuels: A review

Kumar, Prem; Sandhu, Sarbjot Singh

doi:10.1016/j.matpr.2021.02.621

Cited by 16 publications

(10 citation statements)

References 49 publications

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“…The best linear relationship through which the best result and the best equation of calculating values of ON. Theoretically to compare these values with values collected practically (12) When observing the results in Table (4), we find that there is a convergence of some theoretically calculated octane number values with the practically calculated values, and this relationship indicates the accuracy of the calculation used in this research. The DFT method (ab intion) was closer to practical values than the AM1 method (semi-empirical) of calculations used in a previous study (11) .…”

Section: Resultsmentioning

confidence: 58%

“…Gasoline fuel is a mixture of different types of hydrocarbons such as paraffins, olefins, naphthenes and aromatics, and they differ according to the source of the crude oil and according to the refining processes (1,2) . The octane number is the approved characteristic for the evaluation of gasoline, which represents the volume percentage of iso-octane (C8H18) in a mixture with ordinary nheptane (C 7 H 16 ) at the same intensity of crackle (3,4) .…”

Section: Introductionmentioning

confidence: 99%

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Developing a New Method for Calculating the Octane Number Based on Quantum Mechanics Methods

Toohi¹,

Ahmed²

2023

CBERJ

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In this study, one of the quantum mechanics methods, the ab-initio method DFT, was used in calculating the number of the physical variables that affect the octane number (ON). Then, these theoretically calculated variables were linked with each other as independent variables and with the octane number values of gasoline derivatives, which were calculated in practice as a dependent variable.The best result obtained through these relationships was (Total Energy, HOMO, LUMO, and Torsion), where the correlation coefficient was close to the right one and the value of the standard deviation is little. Through the results of the relations, a mathematical relationship was proposed through which the ON of gasoline derivatives was theoretically calculated, there was a convergence between the practical values with the theoretically calculated values, which indicated the success of the developed mathematical method.

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Section: Resultsmentioning

confidence: 58%

Section: Introductionmentioning

confidence: 99%

Developing a New Method for Calculating the Octane Number Based on Quantum Mechanics Methods

Toohi¹,

Ahmed²

2023

CBERJ

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“…En loss (17) Hence, the exergy destruction ( . Ex dest ) is obtained from the exergy balance by Equation (18).…”

Section: Exergy Analysismentioning

confidence: 99%

Fischer-Tropsch Diesel and Biofuels Exergy and Energy Analysis for Low Emissions Vehicles

et al. 2021

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This research investigates the effects of a synthetic diesel-like fuel (Fischer-Tropsch diesel) and biofuels (ethanol and biodiesel) fuel blends on the energy-exergy efficiencies and gaseous exhaust emissions characteristics of a compression ignition engine. Two blends of alternative fuels denoted as E15B35FTD50 (15% ethanol, 35% biodiesel, and 50% Fischer-Tropsch diesel) and E15B35D50 (15% ethanol, 35% biodiesel, and 50% diesel) were experimentally studied on a single-cylinder diesel engine and compared to diesel fuel. The results show that the energetic and the exergetic efficiencies of the alternative fuels are comparable to those of the engine fueled with diesel fuel. The unburnt HC, NO, N2O, and NH3 emissions were reduced for the two alternative fuel blends compared to diesel, while CO emissions increased. The light HC species were found to slightly increase for the alternative fuel blends in comparison with diesel fuel. However, the total HC was considerably reduced by the combustion of E15B35FTD50 not only when compared to the diesel fuel combustion, but also when compared to E15B35D50. Overall, these results may contribute to identifying advantages and limitations in terms of energetic-exergetic analysis and emissions for the new generation of conventional diesel and hybrid electric vehicles that aim to achieve future emissions regulations.

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“…1 Conventional CI engines operating on diesel fuel have high thermal efficiency, but they suffer from high soot emissions and NOx due to heterogeneous fuel air mixtures and high combustion temperatures. 2 In order to achieve the best of both combustion modes, several advanced concepts like homogeneous charge compression ignition (HCCI) 3,4 reactivity controlled compression ignition (RCCI) [5][6][7] ,gasoline compression ignition (GCI), 8,9 partially premixed combustion (PPC), 10,11 etc. have been proposed in the literature.…”

Section: Introductionmentioning

confidence: 99%

Modeling the impact of the fuel injection strategy on the combustion and performance characteristics of a heavy-duty GCI engine

Addepalli,

Pamminger,

Scarcelli

et al. 2023

International Journal of Engine Research

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Gasoline compression ignition (GCI) is a promising strategy to achieve high thermal efficiency and low emissions with limited modifications to the conventional diesel engine hardware. It is a partially premixed concept, which derives its superiority from higher volatility and longer ignition delay of gasoline-like fuels combined with higher compression ratio typical of diesel engines. The present study investigates the combustion process in a GCI engine operating with different injection strategies using computational fluid dynamics (CFD). Simulations are carried out on a single cylinder of a multi cylinder heavy-duty compression ignition engine, which operates at a compression ratio of 17:1 and an engine speed of 1038 rev/min. Two different injection strategies viz., late injection (LI), and early pilot injection (EP) are investigated to understand their impact on combustion and performance of the engine. Renormalized group (RNG) k-ε model is used to describe in-cylinder turbulence and KH RT model is used to simulate the fuel spray breakup. The developed CFD methodology is validated against relevant experimental data under a wide range of operating conditions for each injection strategy. The developed CFD methodology was found to capture the engine combustion behavior quite well. Based on the validated CFD model, the differences in the progress of combustion event for the two injection strategies is highlighted. It was found that a larger pilot fuel mass fraction results in a steeper rise in the initial heat release rate which in turn influences the transition to mixing controlled combustion. In line with the experimental data, the study showed that the late pilot injection strategy with three injection pulses, results in higher performance compared to the other conditions.

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Impact analysis of partially premixed combustion strategy on the emissions of a compression ignition engine fueled with higher octane number fuels: A review

Cited by 16 publications

References 49 publications

Developing a New Method for Calculating the Octane Number Based on Quantum Mechanics Methods

Developing a New Method for Calculating the Octane Number Based on Quantum Mechanics Methods

Fischer-Tropsch Diesel and Biofuels Exergy and Energy Analysis for Low Emissions Vehicles

Modeling the impact of the fuel injection strategy on the combustion and performance characteristics of a heavy-duty GCI engine

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