Experimental study on the spray characteristics of an air-assisted fuel injection system using kerosene and gasoline

Hu, Jiashun; Liu, Bolan; Zhang, Chao; Gao, Hongli; Zhao, Zhenfeng; Zhang, Fujun; Wang, Yan

doi:10.1016/j.fuel.2018.08.083

Cited by 41 publications

(5 citation statements)

References 25 publications

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“…This is partly due to the higher air resistance, which reduces the overall penetration length, and partly due to less flash boiling, which would lead to improved atomization. The results agree well with those of [25], which showed the difference between kerosene and gasoline under comparable conditions. They found that kerosene has a narrower spray angle due to its higher density and viscosity, resulting in a longer spray penetration length.…”

Section: Spray Analysissupporting

confidence: 89%

Further Development of Gasoline from the bioliq® Process with Focus on Particulate and Hydrocarbon Emissions

Michler

Niethammer

Fuchs

et al. 2023

Fuels

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The production of CO2-neutral fuels is a key technology to achieve the European Union’s targets of greenhouse gas reduction in the transport sector. For a straightforward application such as drop-in fuel, regenerative gasoline must meet emission requirements without causing significant changes in engine parameters. The objective of this work was to demonstrate the emission reduction potential of fuel from the bioliq® plant by reducing the content of heavy aromatics in the product refinement. For three blends with varying contents of bioliq® fuel, the spray behavior was studied in a pressurized chamber and the particulate and hydrocarbon emissions were investigated using a single-cylinder research engine. With increasing bioliq® fuel content, atomization was degraded by lower flash boiling at low pressure. This effect vanished at higher chamber pressures. Measurements of particulate and hydrocarbon emissions showed significant improvements of 50% to 100% and 10%, respectively, compared to previously investigated bioliq® fuel fractions from 2017. The formation of particulate emissions is virtually unaffected by the blending of bioliq® fuel, due to the absence of heavy aromatics in the refined bioliq® product. Hydrocarbon emissions increased by 20% with higher bioliq® fuel content and late injection timings due to inferior mixture formation as a result of slightly reduced atomization. However, near the optimum injection timing, the hydrocarbon emissions are independent of the bioliq® fuel admixture.

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Section: Spray Analysissupporting

confidence: 89%

Further Development of Gasoline from the bioliq® Process with Focus on Particulate and Hydrocarbon Emissions

Michler

Niethammer

Fuchs

et al. 2023

Fuels

View full text Add to dashboard Cite

show abstract

“…At present, there are few studies related to the effects of fuel temperature on the air-assisted spray characteristics, and these studies mainly focus on gasoline and high temperature [23,24]. No researchers have studied the air-assisted spray characteristics at low temperatures, which greatly affects the design of the cold start control strategies of the AAFI system.…”

Section: Comparative Studymentioning

confidence: 99%

“…Hu et al [23] compared the air-assisted spray characteristics of gasoline and kerosene under different test conditions to find considerable differences between the two in spray penetration, spray angle, droplet size, and velocity. Gao et al [24] and Wu et al [25] investigated the flash boiling phenomenon of air-assisted gasoline and kerosene spray, respectively.…”

Section: Introductionmentioning

confidence: 99%

Experimental Investigation on the Effects of Injection Parameters on the Air-Assisted Diesel Spray Characteristics

Zhao

2022

International Journal of Aerospace Engineering

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The air-assisted fuel injection (AAFI) system may be installed in the spark ignition aviation piston engine for the atomization of heavy fuels. However, studies on the effects of injection parameters on the spray characteristics are insufficient, which affects the improvement of AAFI engine performance. In this study, air-assisted diesel spray characteristics are investigated experimentally using a high-speed backlit imaging technique. The effects of main air-assisted injection control parameters such as fuel injection pressure, fuel temperature, and fuel injection duration on the spray characteristics are examined. The results show that spray shape changes from “spindle” to “cone” with an increase in fuel injection pressure. As the fuel injection pressure increases to 1.0 MPa, both the spray penetration and spray width increase significantly. “Protrusions” appear on the spray edge at high fuel temperatures. When the fuel temperature drops to 268 K, the spray penetration and spray width increase slightly. The spray shrinks significantly in both the axial and radial directions with an increase in fuel injection duration. Key parameters that directly affect air-assisted spray characteristics include the difference between the fuel-air mixture injection pressure and the ambient pressure, the density of fuel-air mixture in the air-assisted injector premixed chamber, and the kinetic energy density of the fuel. The former two parameters affect the spray penetration while the latter affects the spray width. The study is beneficial for the design of AAFI engines.

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“…These parameters significantly affect the discharge coefficient at the exit orifice, mean droplet sizes and distribution, spray cone angle, velocity distributions, and the liquid film thickness of the spray emanating from the atomizer. Several researchers including, Hu et al (2019) and Wu et al (2020), Shin et al (2019), Ortman and Lefebvre (1985), and Zhang et al (2017) and Dafsari et al (2019) studied the influence of injection pressure on spray cone angle. The results obtained show that within a given range of injection pressures, the equivalent spray angle is inversely related to the change in pressure.…”

Section: Introductionmentioning

confidence: 99%

Validation of Σ−yliq Atomization Model in Pressure Swirl Atomizer

Amedorme¹,

Roselina

2022

Int. J. Eng. Tech. Mgmt. Res.

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In many combustion and agricultural applications atomizers are used to increase the surface area of the liquid to ensure high rates of mixing and improve evaporation. The most common, simple, and reliable atomizer is the pressure swirl atomizer. This atomizer is said to have quality and effective atomization compared to others and induces swirling motion to the liquid and gives a hollow cone spray with air core as it emerges from the exit orifice. To enhance the understanding and prediction of the atomizing characteristics various atomization models are used and need to be investigated experimentally. This paper presents a validation of the Σ−Yliq atomization model of two-phase flow in a pressure swirl atomizer using commercial CFD star-cd code and laser-diffraction based drop measurements. To obtain the best results for the droplet mean diameter between the prediction and the experiment in terms of turbulence different k-e models were evaluated. The results show that the computational predictions of Sauter Mean Diameter (SMD) for the model have a good agreement with most of the experimental measurements in the radial positions when standard k-ɛ turbulence was used. However, more divergence was observed between the predictions and the experimental measurements when the RNG and Realizable k-ɛ turbulence models were used in the predictions. It was also observed that the model has good agreement with the mean droplet measurements on the spray centreline and radial axis with a percentage error of less than five percent.

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Experimental study on the spray characteristics of an air-assisted fuel injection system using kerosene and gasoline

Cited by 41 publications

References 25 publications

Further Development of Gasoline from the bioliq® Process with Focus on Particulate and Hydrocarbon Emissions

Further Development of Gasoline from the bioliq® Process with Focus on Particulate and Hydrocarbon Emissions

Experimental Investigation on the Effects of Injection Parameters on the Air-Assisted Diesel Spray Characteristics

Validation of Σ−yliq Atomization Model in Pressure Swirl Atomizer

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