Characterization of spray and combustion processes of biodiesel fuel injected by diesel engine common rail system

Kuti, Olawole Abiola; Zhu, Jingyu; Nishida, Keiya; Wang, Xiangang; Huang, Zuohua

doi:10.1016/j.fuel.2012.05.014

Cited by 146 publications

(78 citation statements)

References 26 publications

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“…Soot production reduces and start of soot formation is delayed with increase in biodiesel percentage in blended fuels [67]. NO x formation increases with increase of biodiesel in blended fuels [62]. From the above discussion, it can be said that biodiesel sprays exhibit a longer liquid length, shorter liftoff length, shorter ignition delay, higher combustion rate and produce lower soot and higher NO x as compared to diesel.…”

Section: Evaporating and Combusting Spraysmentioning

confidence: 95%

“…Despite undergoing slower evaporation, biodiesels exhibit a shorter ignition delay because of higher cetane number resulting from the fuel oxygen content [61]. For biodiesels, the lift-off length is also observed to be shorter as compared to diesel indicating that the air entrainment will be inferior in biodiesel spray combustion [62]. Parameters such as nozzle hole size, injection pressure, ambient gas density and temperature, etc.…”

Section: Evaporating and Combusting Spraysmentioning

confidence: 99%

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A Review on Atomization and Sprays of Biofuels for IC Engine Applications

Boggavarapu

Ravikrishna

2013

International Journal of Spray and Combustion Dynamics

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Ever increasing energy requirements, environmental concerns and energy security needs are strongly influencing engine researchers to consider renewable biofuels as alternatives to fossil fuels. Spray process being important in IC engine combustion, existing literature on various biofuel sprays is reviewed and summarized. Both experimental and computational research findings are reviewed in a detailed manner for compression ignition (CI) engine sprays and briefly for spark ignition (SI) engine sprays. The physics of basic atomization process of sprays from various injectors is included to highlight the most recent research findings followed by discussion highlighting the effect of physico-chemical properties on spray atomization for both biofuels and fossil fuels. Biodiesel sprays are found to penetrate faster and have narrow spray plume angle and larger droplet sizes compared to diesel. Results of analytical and computational models are shown to be useful in shedding light on the actual process of atomization. However, further studies on understanding primary atomization and the effect of fuel properties on primary atomization are required. As far as secondary atomization is concerned, changes in regimes are observed to occur at higher air-jet velocities for biodiesel compared to those of diesel. Evaporating sprays revealed that the liquid length is longer for biodiesel. Pure plant oil sprays with potential use in CI engines may require alternative injector technology due to slower breakup as compared to diesel. Application of ethanol to gasoline engines may be feasible without any modifications to port fuel injection (PFI) engines. More studies are required on the application of alternative fuels to high pressure sprays used in Gasoline Direct Injection (GDI) engines.

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Section: Evaporating and Combusting Spraysmentioning

confidence: 95%

Section: Evaporating and Combusting Spraysmentioning

confidence: 99%

A Review on Atomization and Sprays of Biofuels for IC Engine Applications

Boggavarapu

Ravikrishna

2013

International Journal of Spray and Combustion Dynamics

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“…Furthermore, CR systems allow the division of the fuel dose into several parts, injected in a sequence, depending on the current operating conditions of the engine. With variable adjustment of fuel pressure and dividing the fuel dose into several smaller doses, injected in a sequence, the combustion process can be controlled by reducing the maximum heat release rate and extending the combustion time of diesel fuel (Carlucci et al, 2003;Kuti et al, 2013;Wierzbicki, 2014;Yan and Wang, 2011).…”

Section: The Combustion Process In Dual-fuel Compression-ignition Engmentioning

confidence: 99%

Numerical Studies on Controlling Gaseous Fuel Combustion by Managing the Combustion Process of Diesel Pilot Dose in a Dual-Fuel Engine

Mikulski¹,

Wierzbicki²,

Piętak³

2015

Chemical and Process Engineering

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Protection of the environment and counteracting global warming require finding alternative sources of energy. One of the methods of generating energy from environmentally friendly sources is increasing the share of gaseous fuels in the total energy balance. The use of these fuels in compression-ignition (CI) engines is difficult due to their relatively high autoignition temperature. One solution for using these fuels in CI engines is operating in a dualfuel mode, where the air and gas mixture is ignited with a liquid fuel dose. In this method, a series of relatively complex chemical processes occur in the engine's combustion chamber, related to the combustion of individual fuel fractions that interact with one another. Analysis of combustion of specific fuels in this type of fuel injection to the engine is difficult due to the fact that combustion of both fuel fractions takes place simultaneously. Simulation experiments can be used to analyse the impact of diesel fuel combustion on gaseous fuel combustion. In this paper, we discuss the results of simulation tests of combustion, based on the proprietary multiphase model of a dual-fuel engine. The results obtained from the simulation allow for analysis of the combustion process of individual fuels separately, which expands the knowledge obtained from experimental tests on the engine.

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“…Increase in ignition delay has been often longer than the fuel injection duration, which causes ignition dwell, defined as the duration between the EOI and the start of combustion. With positive ignition dwell, mixing process occurring near or after the EOI dominate the following combustion and emission formation [9][10].…”

Section: Introductionmentioning

confidence: 99%

Effect of Variant End of Injection Period on Combustion Process of Biodiesel Combustion

et al. 2016

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Abstract.Biodiesel is an alternative fuel as a replacement to the standard diesel fuel in combustion diesel engine. The biodiesel fuel has a significantly influences throughout the combustion process and exhaust emission. The purpose of this research is to investigate the combustion process behavior during the End of Injection (EOI) period and operates under variant conditions using Rapid Compression Machine (RCM). Experimental of RCM is used to simulate a combustion process and combustion characteristics of diesel engine combustion. Three types of biodiesel blend which are B5, B10 and B15 were tested at several injection pressures of 80 MPa, 90 MPa and 130 MPa under different ambient temperatures, 750 K to 1100 K. The results of this study showed that the ignition delay slightly reduced with increasing the content of biodiesel blends from B5, B10 and B15 and became more shorten as the injection pressure been enhanced. As the injection pressure increased, the behavior of combustion pressure at end of injection is reduced, radically increased the NOX emission. It is noted that the process of combustion at the end of injection increased as the ambient temperature is rising. In fact, higher initial ambient temperature improved the fuel atomization and mixing process. Under the biodiesel combustion with higher ambient temperature condition, the exhaust emission of CO, O2, and HC became less but increased in NOX emission. Besides, increased in blends of biodiesel ratio are found to enhance the combustion process, resulted a decreased in HC emissions.

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Characterization of spray and combustion processes of biodiesel fuel injected by diesel engine common rail system

Cited by 146 publications

References 26 publications

A Review on Atomization and Sprays of Biofuels for IC Engine Applications

A Review on Atomization and Sprays of Biofuels for IC Engine Applications

Numerical Studies on Controlling Gaseous Fuel Combustion by Managing the Combustion Process of Diesel Pilot Dose in a Dual-Fuel Engine

Effect of Variant End of Injection Period on Combustion Process of Biodiesel Combustion

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