Cavitation of Biofuel Applied in the Injection Nozzles of Diesel Engines

Wo, Hengzhou; Hu, Xianguo; Wang, Hu; Xu, Yufu

doi:10.1002/9781118562093.ch4

Cited by 5 publications

(3 citation statements)

References 26 publications

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“…The common rail pressure for the typical operating conditions of this type of diesel atomizer we studied is 25 MPa, because experimental data are available for a common rail pressure at 25 MPa, but less for a common rail pressure higher than 25 MPa. 23,24 So in order to validate the simulated results more easily, we use a common rail pressure at 25 MPa.…”

Section: Physical Model and Computational Gridsmentioning

confidence: 99%

Transient simulation of cavitation evolution process in a diesel engine injector

Qiu

et al. 2022

International Journal of Engine Research

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In this study, a method for simulating the whole transient process of the cavitation evolution in a diesel injector was proposed. Diesel is taken as the fuel. The basic characteristics of partial, local, and super cavitation phenomena inside the injector were reproduced and discussed at different time steps. On the basis of movement features of the injector needle, Firstly, the moving process of the diesel injection such as the upward, suspension, and downward movements were simulated under different injector geometric parameters. The time-dependent movement process of the injector needle were controlled by a user-defined program developed by ourselves. Thereafter, a dynamic grid system and a two-phase flow cavitation numerical model were constructed and adopted to numerically reproduce the two-phase flow and the cavitation inside the injector. It was found that the volume fraction of the gas diesel during the partial cavitation is greater than that during the super-cavitation. The faster the needle valve opens, the earlier super-cavitation forms, but the gas volume fraction of diesel decreases faster in the injection orifice. Increasing the drain orifice diameter is helpful for earlier formation of the super-cavitation.

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Section: Physical Model and Computational Gridsmentioning

confidence: 99%

Transient simulation of cavitation evolution process in a diesel engine injector

Qiu

et al. 2022

International Journal of Engine Research

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“…The geometry of the nozzle hole is crucial in the flow of fuel. In the chapter written by Wo et al [52], entitled "Cavitation of Biofuel Applied in the Injection Nozzles of Diesel Engines", the authors present a synthesis of the conditions of the appearance of cavitation inside an injector that is powered by biofuels, such as the geometric shape of the nozzles (radius of entry, and the L/D ratio). Increasing the inlet radius has the effect of increasing the discharge coefficient and, thus, reducing the volume fraction of the steam, i.e., cavitation.…”

Section: Effect Of Injector Geometrymentioning

confidence: 99%

Review on the Effect of the Phenomenon of Cavitation in Combustion Efficiency and the Role of Biofuels as a Solution against Cavitation

et al. 2021

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Concerning the problem of wanting the performance of heat engines used in the automotive, aeronautics, and aerospace industries, researchers and engineers are working on various possibilities for improving combustion efficiency, including the reduction of gases such as CO, NOx, and SOx. Such improvements would also help reduce greenhouse gases. For this, research and development has focused on one factor that has a significant impact on the performance of these engines: the phenomenon of cavitation. In fact, most high-performance heat engines are fitted with a high-speed fuel supply system. These high speeds lead to the formation of the phenomenon of cavitation generating instabilities in the flow and subsequently causing disturbances in the combustion process and in the efficiency of the engine. In this review article, it is a question of making a state-of-the-art review on the various studies which have dealt with the characterization of the phenomenon of cavitation and addressing the possible means that can be put in place to reduce its effects. The bibliographic study was carried out based on five editors who are very involved in this theme. From the census carried out, it has been shown that there are many works which deal with the means of optimization that must be implemented in order to fight against the phenomenon of cavitation. Among these solutions, there is the optimization of the geometry of the injector in which the fuel flows and there is the type of fuel used. Indeed, it is shown that the use of a biofuel, which, by its higher viscosity, decreases the effects of cavitation. Most of these jobs are performed under cold fluidic conditions; however, there is little or no work that directly addresses the effect of cavitation on the combustion process. Consequently, this review article highlights the importance of carrying out research work, with the objective of characterizing the effect of cavitation on the combustion process and the need to use a biofuel as an inhibitor solution on the cavitation phenomenon and as a means of energy transition.

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“…There are two potential energy sources that are needed to sustain life and human development: renewable energy, such as that derived from solar, biomass, and wind energy, and nonrenewable energy, such as coal, petroleum, and natural gas [1][2][3]. The rapid development of society and gradual reduction of non-renewable energy sources have negatively affected the energy supply of the world.…”

Section: Introductionmentioning

confidence: 99%

Morphology, composition, and structure of carbon deposits from diesel and biomass oil/diesel blends on a pintle-type fuel injector nozzle

Dearn

Song

et al. 2015

Tribology International

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a b s t r a c tA biomass oil/diesel blend was prepared using an emulsion method and combusted in a diesel engine. An injector was then removed and the morphology, composition, and structure of the carbonaceous deposits on the pintle-type nozzle were characterized using a combination of HRTEM, SEM/EDAX, Raman and XRD. Results showed that the carbon deposition of the emulsified fuel with high crystallinity was greater than that of diesel. The agglomerated particulate diameters of the deposited carbon from diesel and emulsified fuel were approximately 10-30 μm and 50 μm, respectively. The carbon deposition mechanism from the emulsified fuel was attributed to the high oxygen content of the groups leading to increased polymerization and subsequent condensation on the nozzle surfaces that was then carbonised.

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Cavitation of Biofuel Applied in the Injection Nozzles of Diesel Engines

Cited by 5 publications

References 26 publications

Transient simulation of cavitation evolution process in a diesel engine injector

Transient simulation of cavitation evolution process in a diesel engine injector

Review on the Effect of the Phenomenon of Cavitation in Combustion Efficiency and the Role of Biofuels as a Solution against Cavitation

Morphology, composition, and structure of carbon deposits from diesel and biomass oil/diesel blends on a pintle-type fuel injector nozzle

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