Development of gasoline-ethanol blends laminar flame speed correlations at full-load Si engine conditions via 1D simulations

Pecchia, M.; Pessina, Valentina; Iacovano, Clara; Cantore, Giuseppe

doi:10.1063/1.5138796

Cited by 4 publications

(2 citation statements)

References 45 publications

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“…The quantities l I and l F are the turbulence integral length scale and the laminar flame thickness, respectively. The term S o L denotes the laminar flame speed, which is calculated as [37]:…”

Section: Turbulent Flame Speedsmentioning

confidence: 99%

Impact of Multi-Component Surrogates on the Performances, Pollutants, and Exergy of IC Engines

Mondo

Agrebi

Hamdi

et al. 2022

Entropy

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Even though there is a pressing interest in clean energy sources, compression ignition (CI) engines, also called diesel engines, will remain of great importance for transportation sectors as well as for power generation in stationary applications in the foreseeable future. In order to promote applications dealing with complex diesel alternative fuels by facilitating their integration in numerical simulation, this paper targets three objectives. First, generate novel diesel fuel surrogates with more than one component. Here, five surrogates are generated using an advanced chemistry solver and are compared against three mechanisms from the literature. Second, validate the suggested reaction mechanisms (RMs) with experimental data. For this purpose, an engine configuration, which features a reacting spray flow evolving in a direct-injection (DI), single-cylinder, and four-stroke motor, is used. The RNG k-Epsilon coupled to power-law combustion models is applied to describe the complex in-cylinder turbulent reacting flow, while the hybrid Eulerian-Lagrangian Kelvin Helmholtz-Rayleigh Taylor (KH-RT) spray model is employed to capture the spray breakup. Third, highlight the impact of these surrogate fuels on the combustion properties along with the exergy of the engine. The results include distribution of temperature, pressure, heat release rate (HRR), vapor penetration length, and exergy efficiency. The effect of the surrogates on pollutant formation (NOX, CO, CO2) is also highlighted. The fifth surrogate showed 47% exergy efficiency. The fourth surrogate agreed well with the maximum experimental pressure, which equaled 85 Mpa. The first, second, and third surrogates registered 400, 316, and 276 g/kg fuel, respectively, of the total CO mass fraction at the outlet. These quantities were relatively higher compared to the fourth and fifth RMs.

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Section: Turbulent Flame Speedsmentioning

confidence: 99%

Impact of Multi-Component Surrogates on the Performances, Pollutants, and Exergy of IC Engines

Mondo

Agrebi

Hamdi

et al. 2022

Entropy

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“…Therefore, seeking a better general correlation for S L is highly interesting for studying the syngas laminar combustion characteristics. Although many correlations have been proposed in the past decade, most of them have worked properly for hydrocarbon fuels, such as CH 4 [31,32], H 2 [28,33], and gasoline and its blending [34][35][36], while the correlations for syngas are scarce. Ravi and Petersen [28] proposed a simple correlation for different H 2 /CO mixtures at a high temperature and pressure while considering water dilution.…”

Section: Introductionmentioning

confidence: 99%

Experimental Study of Explosion Characteristics and General Correlations of Lean H2/CO/CH4/Air Mixtures in Quiescence

Nguyen

et al. 2023

International Journal of Energy Research

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A comprehensive understanding of the combustion characteristics of complex and changeable synthesis gas (syngas) compositions is essential for the further development of syngas-fueled engines with high thermal efficiency and low emissions. This study investigated explosion duration properties and laminar burning velocity ( S L ) of multicomponent syngas/air using the pressure-rise method. The lean multicomponent syngas/air mixtures at various equivalence ratios ( ϕ = 0.6 , 0.7, and 0.8) containing different volumetric fractions of H2 (10–30%), CO (10–30%), and CH4 (40–60%) were conducted in a cylindrical constant volume combustion chamber using a dual-coil car ignition system. The explosion duration was characterized by the flame development time (FDT) and flame rising time (FRT), where FDT (FRT) is the time between spark ignition and 10% (10% and 90%) of the total heat release. The results showed that the values of FDT were approximately twofold of the FRT values, and they decreased with increasing H2 or CO content in the mixture. The leaner the mixture, the faster would be the reduction in the FRT and FDT as increasing H2 and/or CO content. Moreover, FDT and FRT were the shortest at a (H2/(H2+CO)) ratio of 0.5, at which the CH4 content was the lowest. Beyond this ratio, FDT and FRT increased, suggesting a significant effect of CH4 concentration. The shorter the FRT value, the higher would be the S L value. The current S L values, together with previous syngas data, could be well represented by a modified correlation with a slight discrepancy. This suggests a possible self-similar propagation of syngas/air laminar flames, regardless of the equivalence ratio, constituent fraction, temperature, pressure, and dilution. Additionally, a small value of mean absolute percentage error (~10.8%) revealed a better correlation for predicting S L values of syngas fuels.

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Renewable fuel and blend properties for the reduction of GHG emissions under different spark-ignited engine architectures

Anselmi,

Jan,

Matrat

et al. 2023

Fuel

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Development of gasoline-ethanol blends laminar flame speed correlations at full-load Si engine conditions via 1D simulations

Cited by 4 publications

References 45 publications

Impact of Multi-Component Surrogates on the Performances, Pollutants, and Exergy of IC Engines

Impact of Multi-Component Surrogates on the Performances, Pollutants, and Exergy of IC Engines

Experimental Study of Explosion Characteristics and General Correlations of Lean H2/CO/CH4/Air Mixtures in Quiescence

Renewable fuel and blend properties for the reduction of GHG emissions under different spark-ignited engine architectures

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