Spray dynamics and evaporation in a multihole GDI injector for pulsatile and split injection at elevated ambient pressure and temperature conditions

Muddapur, Anandteerth; Jose, Jubin V.; Sahu, Srikrishna; Sundararajan, T.

doi:10.1016/j.fuel.2020.118057

Cited by 12 publications

(4 citation statements)

References 33 publications

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“…The spray radius increases obviously at the spraying stage after impact. The author found that the change of injection pressure on the spray cone angle is mainly affected by the injection pressure [20] and the influx of air around the spray bundle. The injection pressure and environment are not changed in this test, so in the whole process of spraying the injector can generate maximum data.…”

Section: A Experimental Setupmentioning

confidence: 99%

“…Several previous studies have revealed the relationship between fuel density and spray characteristics [16]- [18]. For example, the average peak velocity of the spray tends to be positively correlated with the spray center velocity [19], [20]. Studies have shown that the higher the injection pressure, the higher the spray velocity and spray penetration [14], [15], [21].…”

Section: Introductionmentioning

confidence: 99%

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The Experiment and Simulation on Impact Characteristics of AVGAS Spray Based on Impact Phenomenon

Dimas Endrawan Putra,

Nasrul Ilminnafik,

M Fahrur Rozy Hentihu

et al. 2024

JITCSE

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Avition gasoline (avgas) is one of the fuels used for combustion of piston-type aircraft engines and uses ignition in the form of spark plugs or internal combustion engines. In recent years, the use of avgas fuel itself is very high used in high- wing light aircraft engines, namely Cessna. avgas spray phenomenon that collides with the cylinder wall may occur during fuel injection, so it will produce a changed radius and spray height, which will affect the mixing of fuel and air, later engine performance and exhaust emissions will also be affected. Therefore, it is important to know and study the spray impact phenomenon in avgas-fueled aircraft engines. This research is a spray experiment with a specified pressure and sprayed on the combustion chamber wall so that the results of the image can be studied coupled with data from experimental research, it can make research from computational fluid dynamics (CFD) simulations, providing valuable insights for future research in this field.

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Section: A Experimental Setupmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

The Experiment and Simulation on Impact Characteristics of AVGAS Spray Based on Impact Phenomenon

Dimas Endrawan Putra,

Nasrul Ilminnafik,

M Fahrur Rozy Hentihu

et al. 2024

JITCSE

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“…The injection temperature data will be analyzed using inferential statistics [19][20][21], such as hypothesis testing or regression analysis, to examine the relationship between fuel injection pressure and injection temperature. This will investigate whether there are significant differences in injection temperature when different injection pressures are applied [6,22,23]. Some limitations to consider in this study include: The research will be conducted under laboratory conditions that may differ from practical conditions in internal combustion engines.…”

Section: The Prototypementioning

confidence: 99%

The Effect of Avgas Fuel Injection Pressure on Injection Temperature

2023

IJETER

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The use of internal combustion engines has become common in transportation, especially in aviation, one of which is the Cessna training aircraft with a piston engine. The effect of fuel injection pressure on injection temperature has been a focus of many studies because it has the potential to improve combustion efficiency. Increasing the fuel injection pressure in avgas causes an increase in injection temperature and also enhances temperature stability during injection.

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“…GDI injector directly injects the fuel into the cylinder at high injection pressure to produce finely dispersed droplets, for improving engine performance. Other advantages of GDI technology include better combustion performance, improved fuel economy and higher volumetric efficiency, which have strengthened its scope of application in passenger vehicle segment [25].…”

mentioning

confidence: 99%

Dynamics of the Ammonia Spray Using High-Speed Schlieren Imaging

Cheng¹,

Ojanen²,

Diao³

et al. 2022

SAE Int. J. Adv. & Curr. Prac. in Mobility

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A mmonia (NH3), as a carbon-free fuel, has a higher optimization potential to power internal combustion engines (ICEs) compared to hydrogen due to its relatively high energy density (7.1MJ/L), with an established transportation network and high flexibility. However, the NH3 is still far underdeveloped as fuel for ICE application because of its completely different chemical and physical properties compared with hydrocarbon fuels. Among all uncertainties, the dynamics of the NH3 spray at engine conditions is one of the most important factors that should be clarified for optimizing the fuel-air mixing. To characterize the evolution and evaporation process of NH3 spray, a high-speed Z-type schlieren imaging technique is employed to estimate the spray characteristics under different injection pressure and air densities in a constant volume chamber. Three renewable fuels, including NH3, methanol and ethanol, are investigated to compare the differences in their spray behavior at engine-like conditions. The basic parameters of the spray geometry such as spray penetration, spray cone angle and cross-section area are quantified based on the schlieren images postprocessing. The results show that the spray geometry of NH3 differs from that of the other fuels, which exhibits a longer penetration, larger spray cone angle and cross-section area. Moreover, the NH3 also shows a faster evaporation rate than methanol and ethanol. To extract more information from the spray images, an optical flow algorithm is derived to visualize the velocity field based on the schlieren images. The results indicate that NH3 spray is driven to the spray axis under the effect of the vortices. The vortices are induced by the entrainment of the surrounding gas and act as the driving forces that push the spray plumes towards the axis at the same time. The two vortices of NH3 grow much bigger and stronger and move closer to the spray axis compared to the ethanol and methanol.

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Spray dynamics and evaporation in a multihole GDI injector for pulsatile and split injection at elevated ambient pressure and temperature conditions

Cited by 12 publications

References 33 publications

The Experiment and Simulation on Impact Characteristics of AVGAS Spray Based on Impact Phenomenon

The Experiment and Simulation on Impact Characteristics of AVGAS Spray Based on Impact Phenomenon

The Effect of Avgas Fuel Injection Pressure on Injection Temperature

Dynamics of the Ammonia Spray Using High-Speed Schlieren Imaging

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