Effects of gravity and ambient pressure on liquid fuel droplet evaporation

Gogos, George; Soh, Siang Yong; Pope, Daniel N.

doi:10.1016/s0017-9310(02)00269-7

Cited by 39 publications

(12 citation statements)

References 15 publications

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“…(see e.g. [64,66,[358][359][360][361][362][363][364][365]), their analytical solutions (see e.g. [366]) and asymptotic analyses in the limiting cases (see e.g.…”

Section: Coupled Solutionsmentioning

confidence: 99%

Advanced models of fuel droplet heating and evaporation

Sazhin

2006

Progress in Energy and Combustion Science

718

428

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“…(see e.g. [64,66,[358][359][360][361][362][363][364][365]), their analytical solutions (see e.g. [366]) and asymptotic analyses in the limiting cases (see e.g.…”

Section: Coupled Solutionsmentioning

confidence: 99%

Advanced models of fuel droplet heating and evaporation

Sazhin

2006

Progress in Energy and Combustion Science

718

428

View full text Add to dashboard Cite

“…Besides air pressure, air density also influences penetration length, as reported in Gogos and Soh [34]. The length of penetration was observed based on the spray cone angle.…”

Section: Comparison Of Penetration Length Of Biofuels With Jet-amentioning

confidence: 82%

d2 Law and Penetration Length of Jatropha and Camelina Bio-Synthetic Paraffinic Kerosene Spray Characteristics at Take-Off, Top of Climb and Cruise

et al. 2021

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A comparison of d2 law and penetration length of biofuels with Jet–A through the incorporation of fuel properties and actual combustor inlet data at various flight trajectories is presented. This study aims to identify fuel properties and flight operating conditions that most influence droplet characteristics accurately. The study comprises two phases involving a simulation using GSP to predict combustor inlet data for the respective flight operating conditions and a simulation using ANSYS Fluent V18.1 to obtain combustion characteristics of biofuels and Jet–A . The biofuels chosen in this study are Jatropha Bio-synthetic Paraffinic Kerosene (JSPK) and Camelina Bio-synthetic Paraffinic Kerosene (CSPK), evaluated as pure (100%) and blend (50%) with Jet–A. Thrust specific fuel consumption (TSFC) of biofuels is improved due to lower fuel consumed by the engine. The d2 law curve shows a heat-up period that takes place at the early stage of the combustion process. The penetration length of the fuels is shorter at take-off. Combusting biofuels reduce combustion temperature and the penetration length of the droplet.

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“…Nomura et al [59] examined the evaporation of cold n-heptane droplets in a hot air environment from 300 K to 450 K at various pressures (from 5 atm to 50 atm). The experimental data are taken from the paper of Gogos et al [60], who proposed a very complex axysimmetric model to model them. An aluminum cross-fiber support frame has been utilized by Verwey et al [61], in order to maintain a spherical shape of the droplet.…”

Section: Description Of the Experimental Casesmentioning

confidence: 99%

DropletSMOKE++: A comprehensive multiphase CFD framework for the evaporation of multidimensional fuel droplets

Saufi¹,

Frassoldati²,

Faravelli³

et al. 2019

International Journal of Heat and Mass Transfer

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This paper aims at presenting the DropletSMOKE++ solver, a comprehensive multidimensional computational framework for the evaporation of fuel droplets, under the influence of a gravity field and an external fluid flow. The Volume Of Fluid (VOF) methodology is adopted to dynamically track the interface, coupled with the solution of energy and species equations. The evaporation rate is directly evaluated based on the vapor concentration gradient at the phase boundary, with no need of semi-empirical evaporation sub-models.The strong surface tension forces often prevent to model small droplets evaporation, because of the presence of parasitic currents. In this work we by-pass the problem, eliminating surface tension and introducing a centripetal force toward the center of the droplet. This expedient represents a major novelty of this work, which allows to numerically hang a droplet on a fiber in normal gravity conditions without modeling surface tension. Parasitic currents are completely suppressed, allowing to accurately model the evaporation process whatever the droplet size. DropletSMOKE++ shows an excellent agreement with the experimental data in a wide range of operating conditions, for various fuels and initial droplet diameters, both in natural and forced convection. The comparison with the same cases modeled in microgravity conditions highlights the impact of an external fluid flow on the evaporation mechanism, especially at high pressures.Non-ideal thermodynamics for phase-equilibrium is included to correctly capture evaporation rates at high pressures, otherwise not well predicted by an ideal gas assumption. Finally, the presence of flow circulation in the liquid phase is discussed, as well as its influence on the internal temperature field. DropletSMOKE++ will be released as an open-source code, open to contributions from the sci-

show abstract

Effects of gravity and ambient pressure on liquid fuel droplet evaporation

Cited by 39 publications

References 15 publications

Advanced models of fuel droplet heating and evaporation

Advanced models of fuel droplet heating and evaporation

d2 Law and Penetration Length of Jatropha and Camelina Bio-Synthetic Paraffinic Kerosene Spray Characteristics at Take-Off, Top of Climb and Cruise

DropletSMOKE++: A comprehensive multiphase CFD framework for the evaporation of multidimensional fuel droplets

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