Using Ducted Fuel Injection to Attenuate Soot Formation in a
                    Mixing-Controlled Compression Ignition Engine

Nilsen, Christopher William; Biles, Drummond E.; Mueller, Charles J.

doi:10.4271/03-12-03-0021

Cited by 45 publications

(35 citation statements)

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“…Indeed, the emission of nitrogen oxides would be relatively responsible for pathologies linked to the proliferation of certain types of malignant tumors. In fact, this engine generally operates with poor and non-homogeneous mixtures, which leads to a relatively high level of nitrogen oxides (NO x ) and particulate matter (PM) [1,5,6]. The two major pollutants, particularly nitrogen oxides, are strongly dependent on the temperature of the combustion chamber, which is a function of the cylinder pressure resulting from the high compression ratio imposed by the performance research of this type Energies 2021, 14, 1622 2 of 17 of engine.…”

Section: Introductionmentioning

confidence: 99%

“…Experimental work is being carried out. Ducted fuel injection (DFI) is proposed in the literature as a strategy to improve the fuel/gas load mixture of the compression-ignition engine relative to conventional diesel combustion (CDC) [5][6][7]. The concept of DFI is to inject each fuel spray through a small tube into the combustion chamber to facilitate the creation of a leaner mixture in the self-ignition zone, compared to a fuel jet not surrounded by a duct.…”

Section: Introductionmentioning

confidence: 99%

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Experimental and Simulation of Diesel Engine Fueled with Biodiesel with Variations in Heat Loss Model

et al. 2021

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This study presents an experimental investigation and thermodynamic 0D modeling of the combustion of a compression-ignition engine, fueled by an alternative fuel based on neem biodiesel (B100) as well as conventional diesel (D100). The study highlights the effects of the engine load at 50%, 75% and 100% and the influence of the heat loss models proposed by Woschni, Eichelberg and Hohenberg on the variation in the cylinder pressure. The study shows that the heat loss through the cylinder wall is more pronounced during diffusion combustion regardless of the nature of the fuels tested and the load range required. The cylinder pressures when using B100 estimated at 89 bars are relatively higher than when using D100, about 3.3% greater under the same experimental conditions. It is also observed that the problem of the high pressure associated with the use of biodiesels in engines can be solved by optimizing the ignition delay. The net heat release rate remains roughly the same when using D100 and B100 at 100% load. At low loads, the D100 heat release rate is higher than B100. The investigation shows how wall heat losses are more pronounced in the diffusion combustion phase, relative to the premix phase, by presenting variations in the curves.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Experimental and Simulation of Diesel Engine Fueled with Biodiesel with Variations in Heat Loss Model

et al. 2021

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“…In addition, the DFI strategy was able to maintain a comparable engine combustion performance compared to the conventional free spray method. 10 Fitzgerald et al 15,16 investigated the effects of different duct diameters and standoff distances on the soot formation of a single diesel jet. They reported that soot luminosity could be reduced by about 50% under CI engine combustion conditions.…”

Section: Introductionmentioning

confidence: 99%

Numerical Investigation of the Free and Ducted Fuel Injections under Compression Ignition Conditions

Liu

Mohan

2020

Energy Fuels

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A ducted fuel injection (DFI) strategy has been proposed as an efficient approach to reduce the soot emission in direct-injection compression ignition engines. By injecting the fuel through a small tube within the combustion chamber, a leaner air−fuel mixture is generated compared to the conventional free spray approach, which significantly inhibits the soot formation and helps to reduce the dependence of the engine on after-treatment systems. However, the soot reduction mechanism is still not fully understood. Therefore, in this work, a three-dimensional computational investigation was performed to explain the experimental results. Four different reduced chemical mechanisms were used to simulate the reacting spray A (n-dodecane) data from both the Engine Combustion Network group and literature. An improved post-processing method was also proposed to investigate the detailed combustion feature. The results revealed that the ignition processes using different mechanisms were all dominated by the same reaction CH 2 O + OH = HCO + H 2 O. Of the four reduced mechanisms, Yao mech demonstrated the best-predicted performance. Compared to the free-spray case, the DFI case generated a longer ignition delay and lift-off length and lower soot concentration owing to the significant reduction of air entrainment and longer core jet velocity from the duct exit to the lift-off length location. In addition, the DFI case had a significantly longer low-temperature heat release region but a shorter hightemperature heat release region and a smaller core between these two regions, which helps to reduce the sooting tendency.

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“…This could be attributed to higher wall impingement and lower BTE obtained with these fuel combinations as compared with JAMUNSOB (B20). In addition, better mixing rates and speedy chemical reactions due to the use of a six-hole fuel injector creates a leaner mixture which assists in self-ignition [47][48][49].…”

Section: Hc Emissions (Hce) and Co Emissions (Coe)mentioning

confidence: 99%

Comparative Analysis of Performance, Emission, and Combustion Characteristics of a Common Rail Direct Injection Diesel Engine Powered with Three Different Biodiesel Blends

et al. 2021

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Biodiesel is a renewable energy source which is gaining prominence as an alternative fuel over fossil diesel for different applications. Due to their higher viscosity and lower volatility, biodiesels are blended with diesel in various proportions. B20 blends are viable and sustainable solutions in diesel engines with acceptable engine performance as they can replace 20% fossil fuel usage. Biodiesel blends are slightly viscous as compared with diesel and can be used in common rail direct injection (CRDI) engines which provide high pressure injection using an electronic control unit (ECU) with fuel flexibility. In view of this, B20 blends of three biodiesels derived from cashew nutshell (CHNOB (B20)), jackfruit seed (JACKSOB (B20)), and Jamun seed (JAMNSOB (B20)) oils are used in a modified single-cylinder high-pressure-assisted CRDI diesel engine. At a BP of 5.2 kW, for JAMNSOB (B20) operation, BTE, NOx, and PP increased 4.04%, 0.56%, and 5.4%, respectively, and smoke, HC, CO, ID, and CD decreased 5.12%, 6.25%, 2.75%, 5.15%, and 6.25%, respectively, as compared with jackfruit B20 operation.

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Using Ducted Fuel Injection to Attenuate Soot Formation in a Mixing-Controlled Compression Ignition Engine

Cited by 45 publications

References 0 publications

Experimental and Simulation of Diesel Engine Fueled with Biodiesel with Variations in Heat Loss Model

Experimental and Simulation of Diesel Engine Fueled with Biodiesel with Variations in Heat Loss Model

Numerical Investigation of the Free and Ducted Fuel Injections under Compression Ignition Conditions

Comparative Analysis of Performance, Emission, and Combustion Characteristics of a Common Rail Direct Injection Diesel Engine Powered with Three Different Biodiesel Blends

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