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Advanced droplet sizing of an aeronautic kerosene Jet A-1 spray injected at high-altitude relight conditions

Garcia, S. LU ; Orain, M. ; Doublet, P. ; Illac, G. ; Berrocal, E. LU and Lempereur, C. (2026) In Fuel 405.
Abstract

One of the main requirements for the safety and certification of an aircraft is its ability to relight under high-altitude conditions, i.e., sub-atmospheric and extremely cold environment. In the combustor, the fuel is introduced in liquid form and atomized into droplets, generating a spray that facilitates evaporation and combustion. Therefore, understanding and mastering the atomization process in a gas turbine combustor is a significant challenge for engine manufacturers. Knowledge of the droplet size and its spatial distribution in the chamber is primordial. According to the literature, spray characteristics have never been reported under high-altitude relight conditions. Therefore, for the first time, this study presents an... (More)

One of the main requirements for the safety and certification of an aircraft is its ability to relight under high-altitude conditions, i.e., sub-atmospheric and extremely cold environment. In the combustor, the fuel is introduced in liquid form and atomized into droplets, generating a spray that facilitates evaporation and combustion. Therefore, understanding and mastering the atomization process in a gas turbine combustor is a significant challenge for engine manufacturers. Knowledge of the droplet size and its spatial distribution in the chamber is primordial. According to the literature, spray characteristics have never been reported under high-altitude relight conditions. Therefore, for the first time, this study presents an experimental investigation of droplet sizing of a low-temperature kerosene Jet A-1 spray (233 K) injected from a pressure-swirl atomizer into a chamber at sub-atmospheric pressure (0.3 bar). The 1p-SLIPI LIF/Mie ratio technique is successfully employed and provides a reliable tool for studying spray behavior under various operating conditions.

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author
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organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Advanced laser diagnostics, Aircraft safety, High-altitude relight condition, Kerosene Jet A-1, Sauter mean diameter, Spray
in
Fuel
volume
405
article number
136541
publisher
Elsevier
external identifiers
  • scopus:105013390020
ISSN
0016-2361
DOI
10.1016/j.fuel.2025.136541
language
English
LU publication?
yes
id
8ce2622d-7292-444a-a833-abada553b9a3
date added to LUP
2025-10-01 16:12:22
date last changed
2025-10-14 11:12:17
@article{8ce2622d-7292-444a-a833-abada553b9a3,
  abstract     = {{<p>One of the main requirements for the safety and certification of an aircraft is its ability to relight under high-altitude conditions, i.e., sub-atmospheric and extremely cold environment. In the combustor, the fuel is introduced in liquid form and atomized into droplets, generating a spray that facilitates evaporation and combustion. Therefore, understanding and mastering the atomization process in a gas turbine combustor is a significant challenge for engine manufacturers. Knowledge of the droplet size and its spatial distribution in the chamber is primordial. According to the literature, spray characteristics have never been reported under high-altitude relight conditions. Therefore, for the first time, this study presents an experimental investigation of droplet sizing of a low-temperature kerosene Jet A-1 spray (233 K) injected from a pressure-swirl atomizer into a chamber at sub-atmospheric pressure (0.3 bar). The 1p-SLIPI LIF/Mie ratio technique is successfully employed and provides a reliable tool for studying spray behavior under various operating conditions.</p>}},
  author       = {{Garcia, S. and Orain, M. and Doublet, P. and Illac, G. and Berrocal, E. and Lempereur, C.}},
  issn         = {{0016-2361}},
  keywords     = {{Advanced laser diagnostics; Aircraft safety; High-altitude relight condition; Kerosene Jet A-1; Sauter mean diameter; Spray}},
  language     = {{eng}},
  publisher    = {{Elsevier}},
  series       = {{Fuel}},
  title        = {{Advanced droplet sizing of an aeronautic kerosene Jet A-1 spray injected at high-altitude relight conditions}},
  url          = {{http://dx.doi.org/10.1016/j.fuel.2025.136541}},
  doi          = {{10.1016/j.fuel.2025.136541}},
  volume       = {{405}},
  year         = {{2026}},
}