Theoretical Formulation for Sauter Mean Diameter of Pressure-Swirl Atomizers

Couto, H. S.; Carvalho, João Andrade de; Bastos-Netto, D.

doi:10.2514/2.5221

Cited by 42 publications

(13 citation statements)

References 12 publications

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“…The experimental work of Lefebvre and colleagues [2][3][4] provides analysis of the effect of nozzle design and flow parameters on important characteristics of the spray such as Sauter mean diameter, droplet size distribution, and cone angle. Theoretical investigations of pressure-swirl nozzles have contributed important formulations for key spray quantities such as Sauter mean diameter [5,6] and initial liquid film thickness within the discharge orifice [6,7]. Modeling approaches for calculating drop size distributions of generalized sprays have been developed, and their predictive capabilities are thoroughly reviewed by Babinsky and Sojka [8].…”

Section: Introductionmentioning

confidence: 99%

Effects of leading edge entrainment on the double flame structure in lifted ethanol spray flames

Marley

Welle

Lyons

et al. 2004

Experimental Thermal and Fluid Science

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Section: Introductionmentioning

confidence: 99%

Effects of leading edge entrainment on the double flame structure in lifted ethanol spray flames

Marley

Welle

Lyons

et al. 2004

Experimental Thermal and Fluid Science

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“…The experimental work of Lefebvre and colleagues [2][3][4] provides analysis of the effect of nozzle design and flow parameters on important characteristics of the spray such as Sauter mean diameter, droplet size distribution, and cone angle. Theoretical investigations of pressure-swirl nozzles have contributed important formulations for key spray quantities such as Sauter mean diameter [5,6] and initial liquid film thickness within the discharge orifice [6,7] approaches for calculating drop size distributions of generalized sprays have been developed, and their predictive capabilities are thoroughly reviewed by Babinsky and Sojka [8].…”

Section: Discussionmentioning

confidence: 99%

Stabilization and Blowout of Gaseous- and Spray-Jet Flames

Lyons¹

2004

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“…5 shows the SMD calculated with Eqs. (8) and (ll) vs. the ratio Ula/Uyfor different values of my, the liquid mass flow rate.…”

Section: External Mixing Air-assist Atomizermentioning

confidence: 99%

Generalized liquid film atomization theory

Couto

Bastos-Netto

2000

J. of Therm. Sci.

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The increase of the fael burning area required by most practical combustion processes in order to guarantee the minimum energy density rate release for their start up and operation is normally achieved by the proper choice among several existing types of atomizers. For instance, impinging and multi-impinging jets atomizers are used in rocket combustion chambers, while splash-plate atomizers find their use when wall film cooling is required. Pressure swirl atomizers, either of simplex or duplex kind, along with Y-Jet or Spider Jet atomizers are used in industrial applications and in turbine combustion chambers. Notice, however, that all the types of atomizing devices listed above have one point in common: they are of pre-filming kind, i.e., before the droplet spray is generated, a liquid film is formed. This liquid film is broken into unstable ligaments which contract under the action of surface tension forming the droplets. Once the film thickness is estimated, the droplets' SMD (Sauter Mean Diameter) can be calculated, yielding a crucial parameter for the combustion chamber design. However, although this mechanism of droplet formation has been under study for several decades, most of the available results, are based upon experimental data, valid for a special type of atomizer under the given specific conditions only. This work offers a generalized theory for theoretically estimating the SMD of sprays generated by liquid pre-filming atomizers in general.

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Theoretical Formulation for Sauter Mean Diameter of Pressure-Swirl Atomizers

Cited by 42 publications

References 12 publications

Effects of leading edge entrainment on the double flame structure in lifted ethanol spray flames

Effects of leading edge entrainment on the double flame structure in lifted ethanol spray flames

Stabilization and Blowout of Gaseous- and Spray-Jet Flames

Generalized liquid film atomization theory

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