Experimental Research on the Macroscopic and Microscopic Spray Characteristics of Diesel-PODE3-4 Blends

Chen, Yulin; Liu, Songtao; Guo, Xiaoyu; Jia, Chaojie; Huang, Xiaodong; Wang, Yaodong; Huang, Haozhong

doi:10.3390/en14175559

Cited by 9 publications

(3 citation statements)

References 49 publications

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“…While surface tension affects the fuel surface area, volatility influences the spray evolution and mixture formation [114,[156][157][158][159]. High volatile fuel tends to increase the evaporation rate and lowers SMD thus reducing the spray penetration length [160][161][162][163][164][165]. Low volatile fuel, on the other hand, has relatively lower evaporation rate, larger droplets size, thus increasing spray penetration length, which in some cases could lead to the wall impingement [166][167][168][169][170].…”

Section: Factors Affecting Spray Evolutionmentioning

confidence: 99%

Diesel Spray: Development of Spray in Diesel Engine

Djamari

Idris²,

Paristiawan³

et al. 2022

Sustainability

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Research and development in the internal combustion engine (ICE) has been growing progressively. Issues such as air pollution, fuel cost, and market competitiveness have driven the automotive industry to develop and manufacture automobiles that meet new regulation and customers’ needs. The diesel engine has some advantages over the gasoline or spark ignition engine, including higher engine efficiency, greater power output, as well as reliability. Since the early stage of the diesel engine’s development phase, the quest to obtain better atomization, proper fuel supply, and accurate timing control, have triggered numerous innovations. In the last two decades, owing to the development of optical technology, the visualization of spray atomization has been made possible using visual diagnostics techniques. This advancement has greatly improved research in spray evolution. Yet, a more comprehensive understanding related to these aspects has not yet been agreed upon. Diesel spray, in particular, is considered a complicated phenomenon to observe because of its high-speed, high pressure, as well as its high temperature working condition. Nevertheless, several mechanisms have been successfully explained using fundamental studies, providing several suggestions in the area, such as liquid atomization and two-phase spray flow. There are still many aspects that have not yet been agreed upon. This paper comprehensively reviews the current status of theoretical diesel spray and modelling, including some important numerical and experimental aspects.

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Section: Factors Affecting Spray Evolutionmentioning

confidence: 99%

Diesel Spray: Development of Spray in Diesel Engine

Djamari

Idris²,

Paristiawan³

et al. 2022

Sustainability

View full text Add to dashboard Cite

show abstract

“…Using renewable, low carbon non-fossil based fuels for ICE applications is a promising option to reduce pollutant emissions and carbon footprint [3,4]. Several studies showed the potential of these fuels to achieve emission reduction objectives in different facilities, such as engines [5][6][7][8] and optical vessels [9,10]. Among these fuels, oxymethylene dimethyl ethers (OME n ) are attractive due to their physicochemical properties [11].…”

Section: Introductionmentioning

confidence: 99%

A Synergic Application of High-Oxygenated E-Fuels and New Bowl Designs for Low Soot Emissions: An Optical Analysis

et al. 2023

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Synthetic fuels significantly reduce pollutant emissions and the carbon footprint of ICE applications. Among these fuels, oxymethylene dimethyl ethers (OMEX) are an excellent candidate to entirely or partially replace conventional fuels in compression ignition (CI) engines due to their attractive properties. The very low soot particle formation tendency allows the decoupling of the soot-NOX trade-off in CI engines. In addition, innovative piston geometries have the potential to reduce soot formation inside the cylinder in the late combustion stage. This work aims to analyze the potential of combining OMEX with an innovative piston geometry to reduce soot formation inside the cylinder. In this way, several blends of OMEX-Diesel were tested using a radial-lips bowl geometry and a conventional reentrant bowl. Tests were conducted in an optically accessible engine under simulated EGR conditions, reducing the in-cylinder oxygen content. For this purpose, 2-colour pyrometry and high-speed excited state hydroxyl chemiluminescence techniques were applied to trace the in-cylinder soot formation and oxidation processes. The results confirm that increasing OMEX in Diesel improves the in-cylinder soot reduction under low oxygen conditions for both piston geometries. Moreover, using radial lips bowl geometry significantly improves the soot reduction, from 17% using neat Diesel to 70% less at the highest OMEX quantity studied in this paper.

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“…Zhao et al [23] investigated two neighboring droplets at We = 12.3 in the bag-breakup regime with the normalized separation distance S less than 3, and they found a coalescence mode at S < 1.3 and a puncture mode at the higher S of the two tandem droplets. Chen et al [24] discovered the effect of ambient temperature and injection pressure on the spray atomization of diesel and diesel-polyoxymethylene dimethyl ether (PODE 3-4 ) at 20 and 50% fractions of the volume. The results showed that with the increase of temperature and injection pressure, the droplet size and SMD of diesel and diesel-PODE 3-4 decreased.…”

Section: Introductionmentioning

confidence: 99%

Characteristics of Droplet Behaviors during Spray Breakup Process

et al. 2023

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The variation of droplet parameters during the spray breakup process affects the droplet deposition behavior and accurate application. The aim of this study was to experimentally investigate droplet behaviors along the penetration direction with respect to spray propagation. Particle image analysis (PIA) was applied to obtain the characteristics of droplets at three representative stages (namely, initial, quasi-steady, and end stages) after the start of injection (ASOI). The effects of timing and location on the spray characteristics were thoroughly investigated. First, different morphological changes of spray (droplets, ligaments, and bags) during spray breakup were observed. The experimental results show that droplet size and velocity distinctly increase from upstream to downstream at the initial stage. However, at the quasi-steady and end stages, droplet velocities are similar, and the effects of location are not evident. This indicates that location has a significant effect on droplet behaviors at the initial stage. The mean minimum distance (MD) of droplets first increases considerably and then decreases from upstream to downstream, suggesting that the droplets disperse better at midstream. Moreover, the mean MD at the initial stage exceeds that at the quasi-steady and end stages, denoting that the droplets disperse better with time. Finally, the geometric parameter of droplets and the key stage selection are important for predicting the interaction between the droplets and surfaces.

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Experimental Research on the Macroscopic and Microscopic Spray Characteristics of Diesel-PODE3-4 Blends

Cited by 9 publications

References 49 publications

Diesel Spray: Development of Spray in Diesel Engine

Diesel Spray: Development of Spray in Diesel Engine

A Synergic Application of High-Oxygenated E-Fuels and New Bowl Designs for Low Soot Emissions: An Optical Analysis

Characteristics of Droplet Behaviors during Spray Breakup Process

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