Experimental and numerical investigation of droplet evaporation under diesel engine conditions

Fieberg, C.; Reichelt, Lars; Martin, Diana; Renz, Ulrich; Kneer, Reinhold

doi:10.1016/j.ijheatmasstransfer.2009.01.044

Cited by 24 publications

(5 citation statements)

References 11 publications

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“…19 The droplet stream drag coefficients are more than five times smaller than for isolated droplets and thus droplets are about five times less decelerated. This finding is in accordance with several available studies (Mulholland et al 1988;Poo and Ashgriz 1991;Fieberg et al 2009): All approaches agree that the droplet drag coefficient in an infinite stream depends on aerodynamic forces (Reynolds number), the inter-droplet distance (spacing parameter C) and evaporation (a factor that includes the Spalding mass transfer number). The inter-droplet spacing is the crucial factor for modeling the influence of the stream.…”

Section: Dynamics Of the Droplet Streamsupporting

confidence: 93%

Applicability of pulsed 2cLIF-EET for micro-droplet internal thermometry under evaporation conditions

et al. 2020

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The relatively new thermometry technique "pulsed 2cLIF with MDR-enhanced energy transfer" is tested for the first time on micro-droplet streams in a heated air flow. The method allows simultaneous measurements of the droplet internal temperaturefield, droplet size and droplet velocity. Plausibility of the measurement results is evaluated by comparing results of various experimental conditions among each other and by comparison with analytic modeling. Overall, measurement results are plausible. However, measured temperature-fields are biased by the integral fluorescence signal and initial conditions of the models are limited by the Rayleigh jet breakup that creates the droplet stream.

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Section: Dynamics Of the Droplet Streamsupporting

confidence: 93%

Applicability of pulsed 2cLIF-EET for micro-droplet internal thermometry under evaporation conditions

et al. 2020

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“…Introduction -Fluid dynamics 1 , heat transfer 2, 3 and species transport 4, 5 dynamics in droplets, both pendant 6, 7 as well as sessile 8, 9 , has been an area of immense academic importance within the research community. The importance stems from the fact that droplets are essential components in utilities such as thermal management 10, 11 , aerospace systems 12, 13 , power generation 14 , medical devices 15, 16 , production engineering 17 , etc. In case of multicomponent droplets, such as binary fluids, salt solutions, etc.…”

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confidence: 99%

Electromagnetic field orientation and characteristics governed hydrodynamics within pendent droplets

2018

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The article reports the domineering governing role played by the direction of electric and magnetic fields on the internal advection pattern and strength within salt solution pendant droplets. Literature shows that solutal advection drives circulation cells within salt based droplets. Flow visualization and velocimetry reveals that the direction of the applied field governs the enhancement/reduction in circulation velocity and the directionality of circulation inside the droplet. Further, it is noted that while magnetic fields augment the circulation velocity, the electric field leads to deterioration of the same. The concepts of electro and magnetohydrodynamics are appealed to and a Stokesian stream function based mathematical model to deduce the field mediated velocities has been proposed. The model is found to reveal the roles of and degree of dependence on the governing Hartmann, Stuart, Reynolds and Masuda numbers. The theoretical predictions are observed to be in good agreement with experimental average spatio-temporal velocities. The present findings may have strong implications in microscale electro and/or magnetohydrodynamics.

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“…Under these conditions, a steady flame envelops the porous sphere up to a certain air velocity termed critical velocity [13]. Before conducting each set of experiments with the fuel blends, care has been taken to ensure the homogeneity and freshness of the mixture.…”

Section: Experimental Setup and Data Acquisitionmentioning

confidence: 99%

“…Though there are extensive research efforts in diesel droplet evaporation, ignition and combustion [12,13] studies, there is very scanty effort on biodiesel droplets [14][15][16][17][18][19]. Morin et al [14] in their investigation on evaporation of rapeseed and sunflower methyl esters using suspended droplet method observed that the droplets of vegetable oil methyl esters evaporate like a monocomponent droplet with a significant heating phase.…”

Section: Introductionmentioning

confidence: 99%

Analysis of Multimode Burning Characteristics of Isolated Droplets of Biodiesel–Diesel Blends

Prakash¹,

Raghavan²,

Mehta

2013

Journal of Energy Resources Technology

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Blended fuels such as biodiesel-diesel blends are being extensively used in practical devises such as engines. The burning characteristics of blended fuels are quite different than that of the individual fuels and need to be understood. In this study, a semiempirical analysis concerning the mass burning rate characteristics of biodiesel-diesel blends is presented based on the data measured using porous sphere experiments. Finally, a correlation for evaluating instantaneous burning rate of biodiesel-diesel blended fuels has been proposed for practical applications. Further, using this correlation, transient burning characteristics of blended biodieseldiesel droplet in suspended mode ha\'e been studied for different blend compositions. Multiple modes of burning regimes are identified for the blended fuels.

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Experimental and numerical investigation of droplet evaporation under diesel engine conditions

Cited by 24 publications

References 11 publications

Applicability of pulsed 2cLIF-EET for micro-droplet internal thermometry under evaporation conditions

Applicability of pulsed 2cLIF-EET for micro-droplet internal thermometry under evaporation conditions

Electromagnetic field orientation and characteristics governed hydrodynamics within pendent droplets

Analysis of Multimode Burning Characteristics of Isolated Droplets of Biodiesel–Diesel Blends

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