Modeling Aircraft Fuel Jettison Using Smoothed Particle Hydrodynamics on Finite-Volume Meshes

Jamie O Macleod; Thomas C S Rendall; Christian B Allen

doi:10.2514/1.C037456

Modeling Aircraft Fuel Jettison Using Smoothed Particle Hydrodynamics on Finite-Volume Meshes

Jamie O Macleod, Thomas C S Rendall^*, Christian B Allen

^*Corresponding author for this work

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Abstract

Weakly compressible smoothed particle hydrodynamics (WCSPH) is used to investigate aircraft fuel jettison using a single phase model. Fuel simulations are coupled to the aircraft CFD flowfield using cell containment checks on the finite-volume mesh to locate any SPH particle within the mesh, after which the local flow velocity vector is retrieved and then used to apply an approximate aerodynamic force to the SPH particle based on a continuum correction
to discrete droplet calculations. Further downstream the SPH simulation may be continued, or a switch made to implicit particle tracking (IPT) in order to accelerate the simulation. Comparison to IPT results shows that a fluid model of the initial continuum breakup of the jet is required, but following this transition to IPT is reasonable to reduce computation time. Models are validated against volume of fluid (VOF) simulations, with runtime of the proposed model being approximately 100 times less than the VOF, and good qualitative agreement also
found compared to recorded flight results.

Original language	English
Pages (from-to)	1071-1088
Number of pages	18
Journal	Journal of Aircraft
Volume	61
Issue number	4
Early online date	13 Feb 2024
DOIs	https://doi.org/10.2514/1.C037456
Publication status	E-pub ahead of print - 13 Feb 2024

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© 2024 by the American Institute of Aeronautics and Astronautics, Inc. All rights reserved.

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title = "Modeling Aircraft Fuel Jettison Using Smoothed Particle Hydrodynamics on Finite-Volume Meshes",

abstract = "Weakly compressible smoothed particle hydrodynamics (WCSPH) is used to investigate aircraft fuel jettison using a single phase model. Fuel simulations are coupled to the aircraft CFD flowfield using cell containment checks on the finite-volume mesh to locate any SPH particle within the mesh, after which the local flow velocity vector is retrieved and then used to apply an approximate aerodynamic force to the SPH particle based on a continuum correctionto discrete droplet calculations. Further downstream the SPH simulation may be continued, or a switch made to implicit particle tracking (IPT) in order to accelerate the simulation. Comparison to IPT results shows that a fluid model of the initial continuum breakup of the jet is required, but following this transition to IPT is reasonable to reduce computation time. Models are validated against volume of fluid (VOF) simulations, with runtime of the proposed model being approximately 100 times less than the VOF, and good qualitative agreement alsofound compared to recorded flight results.",

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N2 - Weakly compressible smoothed particle hydrodynamics (WCSPH) is used to investigate aircraft fuel jettison using a single phase model. Fuel simulations are coupled to the aircraft CFD flowfield using cell containment checks on the finite-volume mesh to locate any SPH particle within the mesh, after which the local flow velocity vector is retrieved and then used to apply an approximate aerodynamic force to the SPH particle based on a continuum correctionto discrete droplet calculations. Further downstream the SPH simulation may be continued, or a switch made to implicit particle tracking (IPT) in order to accelerate the simulation. Comparison to IPT results shows that a fluid model of the initial continuum breakup of the jet is required, but following this transition to IPT is reasonable to reduce computation time. Models are validated against volume of fluid (VOF) simulations, with runtime of the proposed model being approximately 100 times less than the VOF, and good qualitative agreement alsofound compared to recorded flight results.

AB - Weakly compressible smoothed particle hydrodynamics (WCSPH) is used to investigate aircraft fuel jettison using a single phase model. Fuel simulations are coupled to the aircraft CFD flowfield using cell containment checks on the finite-volume mesh to locate any SPH particle within the mesh, after which the local flow velocity vector is retrieved and then used to apply an approximate aerodynamic force to the SPH particle based on a continuum correctionto discrete droplet calculations. Further downstream the SPH simulation may be continued, or a switch made to implicit particle tracking (IPT) in order to accelerate the simulation. Comparison to IPT results shows that a fluid model of the initial continuum breakup of the jet is required, but following this transition to IPT is reasonable to reduce computation time. Models are validated against volume of fluid (VOF) simulations, with runtime of the proposed model being approximately 100 times less than the VOF, and good qualitative agreement alsofound compared to recorded flight results.

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Modeling Aircraft Fuel Jettison Using Smoothed Particle Hydrodynamics on Finite-Volume Meshes

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