Evaporation and combustion of multicomponent fuel droplets

Kitano, Tomoaki; Nishio, Jun; Kurose, Ryoichi; Komori, Satoru

doi:10.1016/j.fuel.2014.07.045

Cited by 84 publications

(35 citation statements)

References 40 publications

(46 reference statements)

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“…In addition, it can also be found that the difference in droplet evaporation characteristics between ABE-diesel blends and diesel is mainly in the early stage of equilibrium evaporation phase because of the high volatility of ABE components. In the ABE-diesel blends droplet evaporation process, the droplet temperature quickly approaches the boiling points of ABE components, the evaporation of ABE components accelerates, which leads to the evident decrease of ABE-diesel blends droplets diameter in the early stage [27]. Furthermore, more ABE content in ABE-diesel blends leads to a faster evaporation in this stage.…”

Section: Droplet Evaporation Characteristics At 423 Kmentioning

confidence: 99%

Evaporation characteristics of acetone–butanol–ethanol and diesel blends droplets at high ambient temperatures

Zhang

Han

et al. 2015

Fuel

103

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Section: Droplet Evaporation Characteristics At 423 Kmentioning

confidence: 99%

Evaporation characteristics of acetone–butanol–ethanol and diesel blends droplets at high ambient temperatures

Zhang

Han

et al. 2015

Fuel

103

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“…18,19 The CPU time for case 1 is about 5.3 million h (520 h on the wall-clock time) on the K computer (Fujitsu SPARC64TM VIIIfx processor, 10 240 cores).…”

Section: ■ Numerical Simulationmentioning

confidence: 99%

Effect of Pressure Oscillations on Flashback Characteristics in a Turbulent Channel Flow

et al. 2015

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A flashback phenomenon is reproduced by a direct numerical simulation (DNS) of a premixed hydrogen−air flame in a turbulent channel flow, and effects of the pressure oscillation, is caused by a virtual combustion instability on the flashback characteristics, are investigated. In addition, the interaction between the flashback flame structure and the turbulent flow structure is examined in detail. For the hydrogen−air reaction, a chemical reaction model, which considers 9 chemical species and 20 reactions, is employed. The results show that the pressure oscillation strongly affects the flashback characteristics, such as the flashback speed and heat flux on the wall, and is at risk for increasing the flashback speed, because the acceleration of the flashback speed by the pressure oscillation is greater than the deceleration of it. Independent of the pressure oscillation, the turbulent eddies passing through the flame tend to be suppressed and vanish by the acceleration of the streamwise flow caused by thermal expansion. However, other turbulent eddies are generated again in a form of longitudinal eddies behind the flame only at the cusps and center of the channel where the upper and lower flames meet, because of the strong fluid shear owing to the thermal expansion.

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“…There are numerous evaporation models available in the literature, see, e.g., [6][7][8][9][10]. Among them, the simplest one, the D 2 -law, developed by Spalding and Godsave [11,12] is used presently.…”

Section: Introductionmentioning

confidence: 99%

Fuel Evaporation in an Atmospheric Premixed Burner: Sensitivity Analysis and Spray Vaporization

Csemány

Józsa

2017

Processes

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Calculation of evaporation requires accurate thermophysical properties of the liquid. Such data are well-known for conventional fossil fuels. In contrast, e.g., thermal conductivity or dynamic viscosity of the fuel vapor are rarely available for modern liquid fuels. To overcome this problem, molecular models can be used. Currently, the measurement-based properties of n-heptane and diesel oil are compared with estimated values, using the state-of-the-art molecular models to derive the temperature-dependent material properties. Then their effect on droplet evaporation was evaluated. The critical parameters were liquid density, latent heat of vaporization, boiling temperature, and vapor thermal conductivity where the estimation affected the evaporation time notably. Besides a general sensitivity analysis, evaporation modeling in a practical burner ended up with similar results. By calculating droplet motion, the evaporation number, the evaporation-to-residence time ratio can be derived. An empirical cumulative distribution function is used for the spray of the analyzed burner to evaluate evaporation in the mixing tube. Evaporation number did not exceed 0.4, meaning a full evaporation prior to reaching the burner lip in all cases. As droplet inertia depends upon its size, the residence time has a minimum value due to the phenomenon of overshooting.

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Evaporation and combustion of multicomponent fuel droplets

Cited by 84 publications

References 40 publications

Evaporation characteristics of acetone–butanol–ethanol and diesel blends droplets at high ambient temperatures

Evaporation characteristics of acetone–butanol–ethanol and diesel blends droplets at high ambient temperatures

Effect of Pressure Oscillations on Flashback Characteristics in a Turbulent Channel Flow

Fuel Evaporation in an Atmospheric Premixed Burner: Sensitivity Analysis and Spray Vaporization

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