In-nozzle flow and spray characteristics for mineral diesel, Karanja, and Jatropha biodiesels

Ágarwal, Avinash Kumar; Som, Sibendu; Shukla, Pravesh Chandra; Goyal, Harsh; Longman, Douglas E.

doi:10.1016/j.apenergy.2015.07.003

Cited by 74 publications

(21 citation statements)

References 29 publications

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“…The atomization of biodiesel is the consequence of higher values of surface tension and viscosity comparative with diesel fuel. The results are in accordance with similar rapports from various authors [6,9,12,14].Calculation of combustion indicates that less air is required for biodiesel due to higher content of oxygen.…”

Section: Discussionsupporting

confidence: 91%

Considerations on the combustion of biofuels in compression ignition engines

et al. 2019

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Biofuels are considered to be attractive alternative fuels due to rising oil prices and the depletion of fossil sources. It is produced by a process of transesterification of vegetable oils and animal fats with an alcohol in the presence of a catalyst. At present, biodiesel and bioethanol are considered solutions, and almost all EU countries have prepared a policy on the production and use of biodiesel in the transport and heating sectors. Biodiesel has certain advantages, such as a higher number of cetan, biodegradability, low sulfur content and aromatic content, and lower carbon monoxide emissions, unburned hydrocarbons and particulate matter. One of the main issues related to biodiesel and biodiesel blends is the high viscosity of the fuel. Among the biodiesel properties, density, viscosity and heating value affect engine performance and emission characteristics. The presented paper highlights the differences that occur in comparison to the classical fuels and the performances obtained when using biodiesel.

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Section: Discussionsupporting

confidence: 91%

Considerations on the combustion of biofuels in compression ignition engines

et al. 2019

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“…However, the spray tip penetration and the spray cone angle of biodiesel are longer and narrower respectively, compared to baseline mineral diesel due to higher fuel density and kinematic viscosity. Similar results were also reported by many other researchers [85,[95][96][97][98][99]. Kuti et al [98] used laser-induced florescence-particulate image velocimetry (LIF-PIV) technique to study the spray characteristics of biodiesel derived from Palm oil.…”

Section: Spray Evolution Spray Tip Penetration and Fuelsupporting

confidence: 79%

Review of Experimental and Computational Studies on Spray, Combustion, Performance, and Emission Characteristics of Biodiesel Fueled Engines

Ágarwal

Park

Dhar

et al. 2018

Journal of Energy Resources Technology

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Biodiesel has emerged as a suitable alternative to mineral diesel in compression ignition (CI) engines in order to ensure global energy security and to reduce engine out emissions in near future. Biodiesel derived from various feedstocks available worldwide fits well in the current fuel supply arrangement for transport sector. However, biodiesel as an alternative transportation fuel has been extensively investigated because of differences in its important fuel properties compared with baseline mineral diesel. Since fuel properties greatly influence spray development, combustion, and emission formation in internal combustion (IC) engines, a number of experimental and computational studies on biodiesel usage in CI engines have been performed to determine its brake thermal efficiency (BTE), gaseous emissions, durability, etc., by various researchers using variety of engines and feedstocks. In the present paper, a critical review of the effect of biodiesel's fuel properties on engine performance, emissions, and combustion characteristics in existing diesel engines vis-a-vis conventional diesel has been undertaken. In addition, the progress and advances of numerical modeling involving biodiesel are also reviewed to determine the effect of fuel properties on spray evolution and development of reaction mechanisms for biodiesel combustion simulations. Fuel properties are discussed in two categories: physical and chemical properties, which are key parameters affecting spray and combustion processes. Subsequent sections review spray, combustion, emissions, and performance characteristics of biodiesels under various engine operation conditions. In the last section of this review paper, numerical modeling of biodiesel covering recent numerical models and schemes to understand the behavior of biodiesel combustion and pollutants formation is included. This review paper comprehensively summarizes biodiesel fuel's (BDFs) spray, combustion, and emission characteristics using experimental and numerical approaches. Limitations and scope for future studies are discussed in each section.

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“…The injection velocity and mass flow rate are lower for biodiesel, and biodiesel should be injected at about 60 K higher temperature as compared to diesel. 20 Furthermore, the atomization quality of biodiesel is inferior to diesel. The spray tip penetration (STP) and Sauter mean diameter (SMD) are greater, while dispersion area and spray cone angle (SCA) are smaller, for biodiesel.…”

Section: Introductionmentioning

confidence: 99%

Numerical simulation of the influence of fuel temperature and injection parameters on biodiesel spray characteristics

Geng

Wang

et al. 2019

Energy Science & Engineering

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The purpose of this study is to investigate the effects of fuel temperature and nozzle length‐diameter ratio (L/D) on biodiesel spray characteristics, under high injection pressure and high ambient pressure, by numerical method. The analysis of spray characteristics is carried out in conjunction with the transient flow inside nozzle. To achieve this, three‐dimensional calculation grids of spray nozzle and spray domain were setup, and the needle movement was achieved by dynamic mesh technique. The reliability of spray models was validated by experimental results. It was established that the variation in spray tip penetration (STP) and Sauter mean diameter (SMD) is similar at different initial conditions. The STP increases at a faster rate initially and then slows down, whereas the SMD gradually decreases with time after the injection. In addition, a sensitivity analysis of the effects of injection parameters on biodiesel spray characteristics was conducted. Compared to the nozzle L/D, injection pressure and fuel temperature have a greater impact on biodiesel spray characteristics. The increase in injection pressure has a significant effect on the velocity distribution, STP and SMD. When the injection pressure is increased from 100 to 200 MPa, the maximum velocity of the spray core zone increases by 33.96%, the STP increases by 27.17%, and the SMD reduces by 14.81%. Furthermore, an increase in fuel temperature mainly affects the concentration distribution and the SMD of atomized droplets. When the fuel temperature is increased from 300 to 350 K, the maximum concentration of axial spray center lowers by 25.41%, and the SMD decreases by 17.19%. However, the increase of L/D chiefly impacts the concentration of axial spray center, but has little effect on other spray parameters. When the nozzle L/D is increased from 4 to 8, the maximum concentration of axial spray center increases by 20.29%.

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In-nozzle flow and spray characteristics for mineral diesel, Karanja, and Jatropha biodiesels

Cited by 74 publications

References 29 publications

Considerations on the combustion of biofuels in compression ignition engines

Considerations on the combustion of biofuels in compression ignition engines

Review of Experimental and Computational Studies on Spray, Combustion, Performance, and Emission Characteristics of Biodiesel Fueled Engines

Numerical simulation of the influence of fuel temperature and injection parameters on biodiesel spray characteristics

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