Numerical study on the influence of nozzle spray shape on spray characteristics using diesel and biofuel blends

Ishak, M. H. H.; Ismail, Farzad; Mat, Sharzali Che; Aziz, Mohd Yusmaidie; Abdullah, M. Z.; Abas, Aizat

doi:10.1080/17597269.2019.1583717

Cited by 10 publications

(3 citation statements)

References 42 publications

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“…Another suspect would be the viscosity of the solutions, which decreases from 5.5 mPa·s for the low-volatility solution to 1.4 mPa·s for the high-volatility solution, as seen in Table . Viscosity is known to have a significant effect on droplet size in atmospheric-pressure sprays. , It is especially important in the Taylor analogy breakup (TAB) model, describing the breakup of liquid into droplets as an oscillator damped by viscous forces . However, by definition, viscosity will only be relevant in response to a deformation, which, at atmospheric pressure, is caused by friction with the ambient gas.…”

Section: Resultsmentioning

confidence: 99%

Handling Nanoparticle Content in Nanocomposite Thin Films Deposited by Misty Plasma Processes through Controlled Flash Boiling Atomization

Chouteau,

Stafford,

Granier

et al. 2024

Langmuir

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Misty plasma processes based on colloidal solutions sprayed into low-pressure plasmas have recently shown great potential for multifunctional thin film deposition. In such processes, nanoparticle accumulation in ring-shaped structures remains the main obstacle to the synthesis of high-quality coatings containing abundant, small-scale, and evenly dispersed nanoparticles. These local buildups appear after a colloidal droplet evaporates from a substrate. Accordingly, controlling the droplets’ size in the spray is of key importance to ensure a uniform nanoparticle content in the plasma-deposited nanocomposite film. In this work, it is shown that the use of more volatile solvents produces finer droplets on the substrate, thereby improving nanoparticle dispersion in the matrix. A one-dimensional evaporation model is further developed and used to show that, contrary to what one might expect, this result cannot be attributed to faster evaporation during droplet transport in the low-pressure plasma. Instead, a so-called “flash” boiling atomization mechanism is discussed to support the experimental findings.

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Section: Resultsmentioning

confidence: 99%

Handling Nanoparticle Content in Nanocomposite Thin Films Deposited by Misty Plasma Processes through Controlled Flash Boiling Atomization

Chouteau,

Stafford,

Granier

et al. 2024

Langmuir

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show abstract

“…This phenomenon decreases with an increase in back pressure. To highlight the effect of nozzle hole geometry and fuel viscosity, Ishak et al [64] used two types of nozzles, one cylindrical, the other conical, powered by four different biofuels with different physical characteristics in terms of viscosity, surface tension, and density. The results of the numerical study on spray characteristics under ANSYS FLUENT, using the discrete phase model (DPM), showed that viscosity, density, and surface tension influence the diameter of Sauter droplets (SMD).…”

Section: Effect Of Injector Geometrymentioning

confidence: 99%

“…FLUENT CFD/discrete phase model [64] The effects of the nozzle hole L/D ratio and fuel temperature for different injection pressures and ambient pressure on biodiesel spray characteristics.…”

Section: Equipment Used Bibliographic Referencementioning

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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Investigation of Spray Behaviour Simulation to Predict Spray Tip Penetration Under Ultra-High Injection Pressure

Bambhania,

Patel

2024

Lecture Notes in Mechanical Engineering

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Numerical study on the influence of nozzle spray shape on spray characteristics using diesel and biofuel blends

Cited by 10 publications

References 42 publications

Handling Nanoparticle Content in Nanocomposite Thin Films Deposited by Misty Plasma Processes through Controlled Flash Boiling Atomization

Handling Nanoparticle Content in Nanocomposite Thin Films Deposited by Misty Plasma Processes through Controlled Flash Boiling Atomization

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

Investigation of Spray Behaviour Simulation to Predict Spray Tip Penetration Under Ultra-High Injection Pressure

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