Influence of fuel temperature on atomization performance of pressure-swirl atomizers

Wang, X. F.; Lefebvre, A. H.

doi:10.2514/3.23052

Cited by 27 publications

(5 citation statements)

References 6 publications

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“…Differences between blends vary in the range 10%-20% of peak values. The size of the droplets decreases in general as the operating pressure is increased as was also observed in [39], whereas the size distribution in the radial direction, across the spray, remains more or less uniform at all measurement stations. The reference fuel Jet A-1 produces the larger droplets whereas the P-N-Ar blend produces droplets with a little smaller SMD.…”

Section: Sauter Mean Droplet Diametersmentioning

confidence: 66%

Spray Characteristics of Alternative Aviation Fuel Blends

Vouros

2017

Aerospace

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Abstract:The compatibility of spray characteristics of alternative fuel blends, in relation to currently used Jet A-1 fuel, has been assessed experimentally. Tested blends were selected based on a narrow cut of paraffins, mixed with appropriately selected aromatics and naphthenes. Relevant physical properties including the density, viscosity, and surface tension were estimated first. The jet spray was produced using a single fluid, generic nozzle at operating pressures 5-11 bars. The atomization characteristics were assessed through measurements of droplet velocity field and droplet size, using phase Doppler anemometry. The physical properties varied within 10% of the reference fuel values. The spray results indicate that all tested blends produced similar atomized jets and droplet sizes, although observed differences may influence the implementation of combustion schemes which require precise control of the flow pattern.

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Section: Sauter Mean Droplet Diametersmentioning

confidence: 66%

Spray Characteristics of Alternative Aviation Fuel Blends

Vouros

2017

Aerospace

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“…In terms of kinematic viscosity, this represents a reduction from 23 cSt to 11 cSt. In order to achieve suitably low viscosities for fting in diesel engines or gas turbines, further addition of single additives or additive mixtures (e.g., water+ methanol) is required, or else preheating of the fuel is needed before atomization (Diebold et al, 1996;Diebold and Czernilc, 1997;Wang and Lefebvre, 1988). A combined approach of a minor amount of additive use and moderate fuel preheating may be the most advantageous approach for viscosity reduction in many applications.…”

Section: !@@!!mentioning

confidence: 99%

Combustion Properties of Biomass Flash Pyrolysis Oils: Final Project Report

Shaddix¹,

Hardesty²

1999

107

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“…Equation 7 parameter values at 25 °C by the same correction terms introduced in Eq. (16), as shown in Fig. 11b.…”

Section: The Temperature Dependence Of the Smd-estimating Formulaementioning

confidence: 58%

“…However, various long-chained oils -which have an emerging relevance as renewable fuels -need preheating [15]. Wang and Lefebvre [16] discussed the effect of fuel preheating, emphasizing that it reduces the SMD and its effect seems independent of the ambient pressure. The researchers published plain measurement results and performed no statistical evaluation or comparison with the estimated SMD.…”

Section: Introductionmentioning

confidence: 99%

Effect of liquid preheating on high-velocity airblast atomization: From water to crude rapeseed oil

Urbán

Malý

Józsa

et al. 2019

Experimental Thermal and Fluid Science

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Airblast atomization is a suitable model platform to understand atomization physics since the atomizer geometry has an insignificant influence on the spray formation. Besides its theoretical relevance, this configuration is used in several practical applications ranging from healthcare to combustion. Presently, a plain-jet airblast atomizer has been investigated experimentally under atmospheric conditions at various atomizing pressures and liquid preheating temperatures. To cover a wide range of liquids by viscosity and surface tension, water, diesel oil, light heating oil, and crude rapeseed oil were atomized to evaluate the droplet size-velocity correlations when the spray is fully developed. Increasing the temperature of high-viscosity liquids prior to atomization improves the spray characteristics until their kinematic viscosity decreases to a certain value that is newly introduced as a limiting viscosity. Further preheating has a marginal effect on droplet size-velocity plots, and the spray becomes more homogeneous. Several SMDestimating formulae were analyzed and improved to consider the effect of liquid preheating and to extend their range of validity. When the kinematic viscosity exceeded the limiting viscosity, the part containing the Weber number was corrected linearly by the preheating temperature. The coefficient of the Ohnesorge number was corrected by the inverse of the kinematic viscosity, without considering the limiting viscosity. The above results help to correct the SMD of atmospheric measurements to elevated liquid temperatures and to contribute to advanced atomization models for numerical software.

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Influence of fuel temperature on atomization performance of pressure-swirl atomizers

Cited by 27 publications

References 6 publications

Spray Characteristics of Alternative Aviation Fuel Blends

Spray Characteristics of Alternative Aviation Fuel Blends

Combustion Properties of Biomass Flash Pyrolysis Oils: Final Project Report

Effect of liquid preheating on high-velocity airblast atomization: From water to crude rapeseed oil

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