Effect of Aviation Fuel Type and Fuel Injection Conditions on Non-reacting Spray Characteristics of a Hybrid Airblast Fuel Injector

Buschhagen, Timo; Zhang, Robert Z.; Bokhart, Andrew J.; Gejji, Rohan; Naik, Sameer V.; Lucht, Robert P.; Gore, Jay P.; Sojka, Paul E.; Slabaugh, Carson D.; Meyer, Scott

doi:10.2514/6.2016-1154

Cited by 17 publications

(10 citation statements)

References 4 publications

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“…Sauter mean diameter measurements, in a spray from a pressure swirl nozzle, presented in [19], showed little variation for different fuels. On the other hand, measurements in sprays produced by a hybrid airblast atomizer in [23], present compatible results with the present study, indicating also a small decrease in diameter for higher injection pressure. However, experiments with the same fuels as in [23], in a single-cup swirl-stabilized combustor at steady-state combustion conditions [38], present an almost inverse relation between fuel properties and droplet sizes.…”

Section: Sauter Mean Droplet Diameterssupporting

confidence: 81%

“…The present work is in line with several contemporary efforts to assess the influence of composition and physical properties on the atomization characteristics of alternative fuels [19][20][21][22][23]. The work was part of a larger effort to investigate the applicability of fuels that can be processed to look like kerosene, as practical alternatives to fossil fuels by the Virtual Fuel Centre of the Environmentally Compatible Air Transport System project (ECATS) [24][25][26].…”

Section: Introductionmentioning

confidence: 48%

“…However, experiments with the same fuels as in [23], in a single-cup swirl-stabilized combustor at steady-state combustion conditions [38], present an almost inverse relation between fuel properties and droplet sizes. It has to be noted that contrary to the above-mentioned investigations [23,38], where the droplet size histograms were skewed, in the present work the size histograms (typical samples are provided as supplementary materials, Figures S1 and S2) have, in most cases (independent of blend, pressure or location), a rather symmetric form of similar extent.…”

Section: Sauter Mean Droplet Diametersmentioning

confidence: 99%

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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 Diameterssupporting

confidence: 81%

Section: Introductionmentioning

confidence: 48%

Section: Sauter Mean Droplet Diametersmentioning

confidence: 99%

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Spray Characteristics of Alternative Aviation Fuel Blends

Vouros

2017

Aerospace

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“…Therefore, it stands to reason that, if a fuel can adversely affect the atomisation of a given fuel injector, the vast majority of which have been optimised for use with Jet A and Jet A-1, this would affect the combustion instability characteristics of the engine (3,4) . With the increasing use of alternative fuels, several studies that discuss the spray characteristics of alternative fuels have been published recently times (5)(6)(7)(8)(9) . 'Atomisation' is a term used to describe in essence the transformation of liquid fuel into small droplets or a spray before being burned in a gas turbine combustor or any other liquid fuel burner.…”

Section: Introductionmentioning

confidence: 99%

“…The importance of fuel injection methods and their fuel atomisation characteristics has been well described in literature (1,5,6,(20)(21)(22)(23)(24)(25)(26) . Also, there are large number of studies in literature detailing the impact of the bulk properties of conventional fuels on atomisation and spray characteristics (5,7,8,12) .…”

Section: Introductionmentioning

confidence: 99%

Impact of aromatic species selection and micro and bulk properties of alternative fuels on atomisation

Wijesinghe¹,

Khandelwal

2021

Aeronaut. j.

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The importance of fuel injection methods and their atomisation characteristics has been well described in literature. Also, there are a large number of studies in literature detailing the impact of bulk properties of conventional fuels on atomisation and spray characteristics. However, there is a lack of knowledge on how different alternative fuels, and specifically aromatic species, impact spray and atomisation characteristics. In this investigation, the impact of alternative fuels, selected aromatic species and their properties on spray atomisation was studied. Details of how different aromatic structures, bonds and other micro properties of aromatics species impact spray and atomisation characteristics were investigated. To achieve this objective, testing was conducted using a Rolls-Royce Tay engine fuel injector. It was found that the droplet sizes in the form of the Sauter Mean Diameter (SMD) correlate well with fuel properties including density, viscosity and surface tension, which is in line with other published literature. Moreover, it was found that there are several aromatic species (ethylbenzene, cumene and tert-butylbenzene) which display improved atomisation. This indicates that the size of the aliphatic groups attached to the benzene ring in the aromatic molecule impact on the drop size and thereby the combustion characteristics. The worst performers were polyaromatic naphthalene compounds. With the increasing push for fuels with selected aromatic species in the future, this study provides knowledge on the impact of their on the atomisation characteristics.

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Optical Characterization of Near-Field Sprays for Various Alternative and Conventional Jet Fuels Using a Flow-Blurring Injector

Qavi

Jiang

2021

Flow Turbulence Combust

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Effect of Aviation Fuel Type and Fuel Injection Conditions on Non-reacting Spray Characteristics of a Hybrid Airblast Fuel Injector

Cited by 17 publications

References 4 publications

Spray Characteristics of Alternative Aviation Fuel Blends

Spray Characteristics of Alternative Aviation Fuel Blends

Impact of aromatic species selection and micro and bulk properties of alternative fuels on atomisation

Optical Characterization of Near-Field Sprays for Various Alternative and Conventional Jet Fuels Using a Flow-Blurring Injector

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