Experimental studies on evaporation of fuel droplets under forced convection using spray in crossflow methodology

Sinha, Anubhav; Prakash, Ritesh; Mohan, A. Madan; Ravikrishna, RV

doi:10.1016/j.fuel.2015.09.088

Cited by 16 publications

(4 citation statements)

References 28 publications

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“…Figure 3 shows the experimental setup for spray visualization and droplet sizing. The imaging technique used in this study is the shadowgraph for the spray structure, and the lens is attached to the camera [21]. Most part of the shadowgraph setup is the same as the PIV system except for the optical imaging system.…”

Section: Methodsmentioning

confidence: 99%

Experimental Study of Spray Characteristics of Kerosene-Ethanol Blends from a Pressure-Swirl Nozzle

Zhang

Dong

Zhou

et al. 2018

International Journal of Aerospace Engineering

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Partial replacement of kerosene by ethanol in a gas turbine is regarded as a good way to improve the spray quality and reduce the fossil energy consumption. The present work is aimed at studying the spray characteristics of kerosene-ethanol blends discharging from a pressure-swirl nozzle. The spray cone angle, discharge coefficient, breakup length, and velocity distribution are obtained by particle image velocimetry, while droplet size is acquired by particle/droplet imaging analysis. Kerosene, E10 (10% ethanol, 90% kerosene), E20 (20% ethanol, 80% kerosene), and E30 (30% ethanol, 70% kerosene) have been considered under the injection pressure of 0.1–1 MPa. The results show that as injection pressure is increased, the discharge coefficient and breakup length decrease, while the spray cone angle, drop size, and spray velocity increase. Meanwhile, the drop size decreases and the spray velocity increases with ethanol concentration when the injection pressure is lower than 0.8 MPa. However, the spray characteristics are not affected obviously by the ethanol concentration when the injection pressure exceeds 0.8 MPa. A relation to breakup length for kerosene-ethanol blends is obtained. The findings demonstrate that the adding of ethanol into kerosene can promote atomization performance.

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Section: Methodsmentioning

confidence: 99%

Experimental Study of Spray Characteristics of Kerosene-Ethanol Blends from a Pressure-Swirl Nozzle

Zhang

Dong

Zhou

et al. 2018

International Journal of Aerospace Engineering

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“…Concerning the nozzle design itself, increased swirl at the circular nozzle outlet homogenizes the radial uniformity of the droplet concentration, decreases the droplet size, going hand in hand with an increase in the number of droplets. As a brief remark, I will not go into detail into combustion processes [152,153], where especially droplet evaporation micromixing are crucial [148].…”

Section: Atomization and Droplet Transport During Spray Coatingmentioning

confidence: 99%

A deep look into the spray coating process in real-time—the crucial role of x-rays

Roth

2016

J. Phys.: Condens. Matter

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Tailoring functional thin films and coating by rapid solvent-based processes is the basis for the fabrication of large scale high-end applications in nanotechnology. Due to solvent loss of the solution or dispersion inherent in the installation of functional thin films and multilayers the spraying and drying processes are strongly governed by non-equilibrium kinetics, often passing through transient states, until the final structure is installed. Therefore, the challenge is to observe the structural build-up during these coating processes in a spatially and time-resolved manner on multiple time and length scales, from the nanostructure to macroscopic length scales. During installation, the interaction of solid-fluid interfaces and between the different layers, the flow and evaporation themselves determine the structure of the coating. Advanced x-ray scattering methods open a powerful pathway for observing the involved processes in situ, from the spray to the coating, and allow for gaining deep insight in the nanostructuring processes. This review first provides an overview over these rapidly evolving methods, with main focus on functional coatings, organic photovoltaics and organic electronics. Secondly the role and decisive advantage of x-rays is outlined. Thirdly, focusing on spray deposition as a rapidly emerging method, recent advances in investigations of spray deposition of functional materials and devices via advanced x-ray scattering methods are presented.

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“…Li et al (2011) analyzed the droplet size distribution and evaporation characteristics of fuel spray of a swirl type atomizer by the laser diagnostic techniques and presented the influence of spray dynamics on the droplet size distribution. Sinha et al (2016) experimentally studied the fuel droplet evaporation under forced convection using spray in the crossflow and analysis of the size and velocity of the evaporating droplet was conducted. Yan et al (2016) measured the fuel evaporation ratio at different inlet conditions of cyclone separator and the evaporation characteristics were analyzed.…”

Section: Introductionmentioning

confidence: 99%

Application of droplet motion and evaporation model in fuel spray in the constant volume bomb

Meng

Yan²,

Zhao

et al. 2019

JTST

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The fuel oil atomization is closely related to the combustion performance of the fuel in the internal combustion engine. However, during the oil atomization, the fast evaporating and moving oil droplets interact strongly with the surrounding gas, posing challenges towards the precise simulation of the combustion process. To precisely capture the interactions between fuel droplets and the surrounding gas, a new multi-droplets motion and evaporation model is deduced by introducing the local parameters surrounding the fuel droplets. The proposed model is validated comparing the simulation results against the experimental data of the containment spray process. Subsequently, the present model is adopted to simulate the fuel spray process in the typical constant volume bomb. The parameters evolution is presented during the course of the spray such as the gas temperature, droplet temperature, evaporating rate, velocity, radii variation, vapor concentration and air-fuel ratio. The analysis of the spray performance is conducted and the superiority of the new model is also discussed. The simulation analysis reveals that the spray droplets interact strongly with the surrounding gas; the developed droplet motion and evaporation model is advantageous in the simulation of the dense multi-droplets spray process.

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Experimental studies on evaporation of fuel droplets under forced convection using spray in crossflow methodology

Cited by 16 publications

References 28 publications

Experimental Study of Spray Characteristics of Kerosene-Ethanol Blends from a Pressure-Swirl Nozzle

Experimental Study of Spray Characteristics of Kerosene-Ethanol Blends from a Pressure-Swirl Nozzle

A deep look into the spray coating process in real-time—the crucial role of x-rays

Application of droplet motion and evaporation model in fuel spray in the constant volume bomb

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