Comparative experimental study on macroscopic spray characteristics of various oxygenated diesel fuels

Bao, Jian; Wang, Haohao; Wang, Ruofei; Wang, Qingxin; Di, Liming; Cheng, Shen

doi:10.1002/ese3.1409

Cited by 30 publications

(7 citation statements)

References 31 publications

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“…As the pressure increases, the bubbles tend to adhere to the needle. This attachment causes the liquid spray to deflect, resulting in the formation of a wider cone angle [35].…”

Section: Resultsmentioning

confidence: 99%

Microscopic Imaging on Diesel Spray and Atomization Process

El Marnissi,

Hwang

2024

Processes

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Improving diesel engine performance requires a comprehensive understanding of fuel atomization and air–fuel mixing within the combustion chamber. Numerous studies have been conducted to reduce emissions and enhance diesel engines. However, further investigation is required on the detailed diesel spray process. In this study, we adopted extinction measurement to analyze the effects of a fuel injection pressure range of 300 to 700 bar on spray morphology. For the extinction imaging setup, we utilized a high-intensity continuous LED source along with a diffuser to ensure uniform light distribution. The high-speed extinction and image processing results indicate that increasing the injection pressure from 300 to 700 bar effectively produced a smaller particulate size (15% reduction) and a better air–fuel mixing process. Especially at the end of injection, our results show smaller liquid ligaments (50% reduction) and droplets around the injector tip with higher injection pressure cases.

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“…As the pressure increases, the bubbles tend to adhere to the needle. This attachment causes the liquid spray to deflect, resulting in the formation of a wider cone angle [35].…”

Section: Resultsmentioning

confidence: 99%

Microscopic Imaging on Diesel Spray and Atomization Process

El Marnissi,

Hwang

2024

Processes

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“…In [21], studies were conducted on adding natural gas to an internal combustion engine. In [22], studies were carried out on macroscopic spray characteristics of various oxygenated diesel fuels.…”

Section: Introduction Review and Analysismentioning

confidence: 99%

Experimental Investigation of Non-Premixed Combustion Process in a Swirl Burner with LPG and Hydrogen Mixture

Dostiyarov,

Umyshev,

Kibarin

et al. 2024

Energies

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In the modern world, issues related to the use of alternative fuels are becoming increasingly pressing. These fuels offer the potential to achieve significantly improved environmental and technological performance. Currently, among such fuels, biodiesel, ammonia, LPG, and hydrogen are considered the most promising options. LPG and hydrogen exhibit a high Lower Heating Value (LHV) and have a relatively low environmental impact. This article investigates the combustion of hydrogen-LPG mixtures in a diffusion burner. The main parameters under study include the proportion of hydrogen in the fuel, equivalence ratio, and vane angle. The analyzed parameters encompass NOx and CO concentrations. The studies have demonstrated that the addition of hydrogen can reduce greenhouse gas emissions, as the combustion product is clean water. The primary focus of this research is the examination of combustion processes involving flow swirl systems and alternative fuels and their mixtures. The studies indicate that flame stabilization is significantly influenced by several factors. The first factor is the amount of hydrogen added to the fuel mixture. The second factor is the degree of mixing between the fuel and oxidizer, along with hydrogen. Lastly, the equivalence ratio plays a crucial role. As the studies have shown, the maximum stabilization for a speed of 5 m/s is achieved at an angle of 60° and a hydrogen fraction of 40%, resulting in φLBO = 0.9. This represents an 8.0% improvement in stabilization compared to the baseline mode, primarily due to the substantial proportion of hydrogen. An analysis of flame photographs reveals that as the twist angle increases, a recirculation zone becomes more apparent. Increasing the blade angle and incorporating hydrogen leads to a reduction in CO concentrations in the exhaust gases. The analysis indicates that increasing the hydrogen proportion to 50%, compared to the absence of hydrogen, results in a 30% decrease in CO concentration. In our case, for the option φ = 0.3 and blade angles of 60°, the reduction in CO concentration was 28.5%. From the authors’ perspective, the most optimal vane angle is 45°, along with a hydrogen fraction of 30–40%. With these parameters, it was possible to achieve concentrations of NOx = 17–25 ppm, φLBO = 0.66, and CO = 130–122 ppm.

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“…Particulate matter (PM) emitted from diesel engines mainly consists of soot, ash, organic compounds, and sulfate material. This has brought about huge environmental and health problems [1][2][3][4][5]. In order to reduce PM emissions and meet increasingly stringent emission regulations, several approaches have been proposed, including internal purification technology, improvement of fuel quality, the optimization engine control strategy, and the use of after-treatment devices [6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Quantitative Analysis of the Impacts of Ash from Lubricating Oil on the Nanostructure of Diesel Particulate Matter

Wu,

Yang,

Wang

et al. 2024

Atmosphere

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Microscopic analyses of the effects of ash on particulate matter oxidation are rather scarce. In this study, three different lubricating oils with varying ash contents were used to investigate their effects on the nanostructure of diesel particulate matter. The nanostructure and nanostructure parameters, including fringe length, fringe separation distance, and fringe tortuosity, were studied using high-resolution transmission electron microscopy. The results show that all samples obtained from blending with different lubricant oil present typical core–shell structures. The inner cores remain relatively unchanged, whereas the thickness of the outer shells increases with the increasing ash content in the lubricant oil under the same working conditions. The fringe length increases and the fringe separation distance decreases with the rising ash content in the lubricant oil operating in the same working conditions. The fringe tortuosity decreases when the ash content in the lubricant oil increases from 0.92% to 1.21%, but shows little change when the ash content in the lubricant oil increases from 1.21% to 1.92%. Based on the effects of ash on the nanostructure parameters, it can be inferred that the oxidation activity of particles decreases with increasing ash content in the lubricant oil.

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Comparative experimental study on macroscopic spray characteristics of various oxygenated diesel fuels

Cited by 30 publications

References 31 publications

Microscopic Imaging on Diesel Spray and Atomization Process

Microscopic Imaging on Diesel Spray and Atomization Process

Experimental Investigation of Non-Premixed Combustion Process in a Swirl Burner with LPG and Hydrogen Mixture

Quantitative Analysis of the Impacts of Ash from Lubricating Oil on the Nanostructure of Diesel Particulate Matter

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