Droplet Spacing on Drag Measurement and Burning Rate for Isothermal and Reacting Conditions

Virepinte, J. F.; Adam, Omer El-Amin Ahmed; Lavergne, G.; Biscos, Y.

doi:10.2514/2.5396

Cited by 6 publications

(4 citation statements)

References 14 publications

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“…Such a distance is often used to underline the neighborhood effects between droplets in evaporation or in combustion ratio, through the distance parameter C, between this distance and the droplet diameter or the flame diameter around a droplet. For instance, according to Crowe et al (2011) and Virepinte et al (1999), there is no interaction between two droplets in terms of evaporation for a distance parameter from 10 to 15. Simulations of Imaoka and Sirignano (2005a,b) on droplet arrays confirm that the evaporation/combustion interaction is quite reduced over a certain value of the distance parameter.…”

Section: Fig 4: Description Of the Data Processing For The Error Analysismentioning

confidence: 99%

Experimental Analysis of Droplet Spatial Distribution in a Spray Burner

Rouzaud¹,

Vicentini

Lecourt

et al. 2021

Atomiz Spr

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Section: Fig 4: Description Of the Data Processing For The Error Analysismentioning

confidence: 99%

Experimental Analysis of Droplet Spatial Distribution in a Spray Burner

Rouzaud¹,

Vicentini

Lecourt

et al. 2021

Atomiz Spr

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“…Since 1988, experimental results on Standard Rainbow Thermometry have been reported [6,12,17,20]. Figure 1 sketches the optical layout.…”

Section: Principlementioning

confidence: 97%

“…Since 1988, Standard Rainbow Thermometry has been investigated [6,12,17,20]. This technique measures the temperature and size of individual droplets or of an ensemble of monodisperse droplets, formed by a piezo ceramic driven monodisperse droplet generator.…”

Section: Introductionmentioning

confidence: 99%

Processing droplet temperature measurement data obtained with rainbow thermometry

et al. 2001

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The state of the art in Rainbow Thermometry is presented. Rainbow Thermometry is a technique for measuring size and temperature of transparent droplets. For data inversion a rainbow pattern is employed, which is formed by a single droplet or by constructive interference of laser light scattered by an ensemble of spherical droplets. In the first case, one speaks about Standard Rainbow Thermometry (SRT), investigated since 1988. In the second case, the technique is called Global Rainbow Thermometry (GRT), studied since 1999; here, the non-spherical droplets and liquid ligaments results in a uniform background and thus do not influence the interference pattern, formed by the spherical droplets, from which average size and temperature are derived. This is a large improvement with respect to Standard Rainbow Thermometry, which is strongly influenced by particle shape. Moreover, GRT is applicable for smaller droplets than the standard technique because the global pattern is not spoiled by a ripple structure. Data inversion schemes based on inflection points, minima and maxima are discussed for SRT and GRT. The standard technique is applied to a monodisperse burning droplet stream, where the problems with particle shape do not exist. Global Rainbow Thermometry is applied to a heated water spray, where the standard technique fails. For both applications the accuracy in the temperature measurement was a few degrees Celsius.

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“…and Pr the Prandtl (Pr f = c pm m / k m ). The drag coefficient of an isolated droplet is estimated using the correlation proposed by Virepinte et al (1999). Note that, for models LK1 and LK2, the factor (1 + B) in Eq.…”

Section: Modeling Of Transfer Ratesmentioning

confidence: 99%

Comparative Study of Equilibrium and Nonequilibrium Evaporation Models for Vaporizing Droplet Arrays at High-Pressure

Lamanna

Sun

Schüler

et al. 2007

Advanced Combustion and Aerothermal Technologies

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Combustion performances and emissions are mainly influenced by atomization, evaporation of fuel droplets and mixing of fuel and air. In particular, vaporization is often the rate-controlling process and is directly related to the specific fuel consumption of the engine and to pollutant formation. The present work focuses on two competing factors, which strongly influence the vaporization process, specifically: drop-drop interactions and high-pressure effects. Numerical predictions from equilibrium and nonequilibrium vaporization models are compared with the experimentally determined evaporation rate of droplet arrays at high-pressure conditions. The objective is to improve the predictive capabilities of spray models by introducing drop interaction effects in the modeling and by verifying which formulation of heat and mass transfer is able to model adequately their mutual interdependence at high-pressure.

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Droplet Spacing on Drag Measurement and Burning Rate for Isothermal and Reacting Conditions

Cited by 6 publications

References 14 publications

Experimental Analysis of Droplet Spatial Distribution in a Spray Burner

Experimental Analysis of Droplet Spatial Distribution in a Spray Burner

Processing droplet temperature measurement data obtained with rainbow thermometry

Comparative Study of Equilibrium and Nonequilibrium Evaporation Models for Vaporizing Droplet Arrays at High-Pressure

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