A reduced mechanism for the combustion of gasoline-ethanol blend on advanced engine combustion modes

Zhang, Lei; Qi, Qianhui

doi:10.1016/j.fuel.2021.120951

Cited by 17 publications

(7 citation statements)

References 40 publications

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“…Furthermore, due to the constraints mentioned above, ethanol's capacity to be extensively employed is quite limited [33,34]. As a result, numerous researchers have studied the performance and emissions of SI engines that run on ethanol-gasoline blends [35][36][37][38]. Ethanol also has a higher latent heat of vaporization, which may result in cold start issues due to poor evaporation.…”

Section: Ethanolmentioning

confidence: 99%

Sustainable Biofuels from First Three Alcohol Families: A Critical Review

et al. 2023

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With its unique qualities, such as infinite supply, high octane number, and capacity to cut greenhouse gas emissions, alcohol is a viable alternative fuel for SI engines. This review article aims to reveal to readers the effects of alcohol on the performance, combustion behavior, and emission characteristics of SI engines by collecting the outcomes from previous research. This article looks at methanol, ethanol, and butanol fuel qualities. The performance of SI engines with butanol, ethanol, and methanol combined with gasoline is investigated in terms of brake torque, brake power, fuel consumption, thermal efficiency, volumetric efficiency, mean effective pressure, and coefficient of variation under various conditions. Second, in-cylinder pressure, mass fraction burnt, ignition delay, pressure increases, and heat release rates are also used to evaluate the combustion characteristic. Finally, the article discusses pollutant emissions such as CO, CO2, NOx, UHC, and exhaust gas temperature. Methanol, ethanol, and butanol mixed with gasoline increased fuel consumption and lowered spark-ignition engines’ thermal efficiency. When alcohol was combined with gasoline, most research found that CO, NOx, and UHC emissions were reduced due to improved combustion.

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Section: Ethanolmentioning

confidence: 99%

Sustainable Biofuels from First Three Alcohol Families: A Critical Review

et al. 2023

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“…The difference compared with DRGEP is that it defines the directed graph and measures the species’ importance through considering both the production and consumption fluxes. This method has also been successfully employed for mechanism reduction in many previous studies. , FSSA is more effective in analyzing the species importance in the whole reaction kinetics, but it is very time-consuming. Therefore, it is used in the final stage when the numbers of species and reactions are relatively smaller after the reductions using the DRGEP and DRGPFA methods.…”

Section: Mechanism Reduction Processesmentioning

confidence: 99%

Reduced Reaction Mechanisms for Sustainable Aviation Fuel (SAF): Isoparaffinic Alcohol-to-Jet Synthetic Paraffinic Kerosene (AtJ-SPK) and Its Blends with Jet A

Xing

Zhang

et al. 2023

Energy Fuels

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Alcohol-to-Jet Synthetic Paraffinic Kerosene (AtJ-SPK), an approved sustainable aviation fuel (SAF) by blending with conventional Jet A fuel, has recently been experimentally studied, and detailed mechanisms have been developed to describe its combustion behavior. The present study aims to develop reduced mechanisms of AtJ-SPK and its blends with Jet A for high-fidelity and computationally affordable computational fluid dynamics. Specifically, two reduced mechanisms were developed for pure AtJ-SPK and its blends with Jet A from LLNL-AtJ-SPK [Richter et al. Combust. Flame 2022, 240, 111994] and POLIMI detailed mechanisms [Ranzi et al. Prog. Energy Combust. Sci. 2012, 38 (4), 468–501], respectively, using a combined reduction method. The reduced mechanisms can achieve 80%/92.4% and 92%/90% reductions of the species/reaction numbers, respectively, compared with those of the master detailed mechanisms. The developed reduced mechanisms were further validated under various conditions by comparing the predicted ignition delay times, laminar flame speeds, and temporal/spatial profiles with those predicted using the master detailed mechanisms as well as experimental data. Finally, the computational cost comparison in the two-dimensional direct numerical simulation demonstrated that the developed reduced mechanisms can impressively accelerate the calculation speed by more than 5000 and 529 times, respectively.

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“…In addition, methane has good anti-explosive properties. A variety of fuels will be studied in future research, such as natural gas [39,40], hydrogen blended natural gas [41,42], LPG [43,44], syngas [45,46], ethanol [47,48], and an ethanol gasoline blend [49,50]. Moreover, the sensor sensitivity will have different effects on engines fueled with various fuels, which is due to the fact that the different physicochemical properties of fuels result in different laminar flame speeds and ideal air-fuel ratios.…”

Section: Future Workmentioning

confidence: 99%

A Numerical Analysis of the Effects of Equivalence Ratio Measurement Accuracy on the Engine Efficiency and Emissions at Varied Compression Ratios

et al. 2021

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Increasingly stringent regulations to reduce vehicle emissions have made it important to study emission mitigation strategies. Highly accurate control of the air-fuel ratio is an effective way to reduce emissions. However, a less accurate sensor can lead to reduced engine stability and greater variability in engine efficiency and emissions. Additionally, internal combustion engines (ICE) are moving toward higher compression ratios to achieve higher thermal efficiency and alleviate the energy crisis. The objective of this investigation was to analyze the significance of the accuracy of air-fuel ratio measurements at different compression ratios. In this study, a calibrated 1D CFD model was used to analyze the performance and emissions at different compression ratios. The results showed that carbon monoxide (CO) and nitrogen oxides (NOx) were sensitive to the equivalence ratio regardless of the compression ratio. With a slight change in the equivalence ratio, a high compression ratio had little effect on the change in engine performance and emissions. Moreover, with the same air-fuel ratio, an excessively high compression ratio (CR = 12) might result in knocking phenomenon, which increases the fluctuation of the engine output parameters and reduces engine stability. Overall, for precise control of combustion and thermal efficiency improvement, it is recommended that the measurement accuracy of the equivalence ratio is higher than 1% and the recommended value of the compression ratio are roughly 11.

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A reduced mechanism for the combustion of gasoline-ethanol blend on advanced engine combustion modes

Cited by 17 publications

References 40 publications

Sustainable Biofuels from First Three Alcohol Families: A Critical Review

Sustainable Biofuels from First Three Alcohol Families: A Critical Review

Reduced Reaction Mechanisms for Sustainable Aviation Fuel (SAF): Isoparaffinic Alcohol-to-Jet Synthetic Paraffinic Kerosene (AtJ-SPK) and Its Blends with Jet A

A Numerical Analysis of the Effects of Equivalence Ratio Measurement Accuracy on the Engine Efficiency and Emissions at Varied Compression Ratios

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