Large-Eddy Simulation of Kerosene Spray Ignition in a Simplified Aeronautic Combustor
| Autor: | L. Hervo, A. Biancherin, Bénédicte Cuenot, J.-M. Senoner |
|---|---|
| Přispěvatelé: | ONERA - The French Aerospace Lab [Toulouse], ONERA, ONERA - The French Aerospace Lab [Châtillon], ONERA-Université Paris Saclay (COmUE), CERFACS, Hervo, Loic |
| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: |
[PHYS.PHYS.PHYS-FLU-DYN]Physics [physics]/Physics [physics]/Fluid Dynamics [physics.flu-dyn]
Materials science General Chemical Engineering Kinetic scheme General Physics and Astronomy 02 engineering and technology 01 natural sciences 7. Clean energy 010305 fluids & plasmas law.invention Physics::Fluid Dynamics 020401 chemical engineering law Phase (matter) 0103 physical sciences Deposition (phase transition) [PHYS.MECA.MEFL] Physics [physics]/Mechanics [physics]/Fluid mechanics [physics.class-ph] [PHYS.MECA.MEFL]Physics [physics]/Mechanics [physics]/Fluid mechanics [physics.class-ph] 0204 chemical engineering Physical and Theoretical Chemistry [PHYS.MECA.THER] Physics [physics]/Mechanics [physics]/Thermics [physics.class-ph] Mechanics [PHYS.PHYS.PHYS-FLU-DYN] Physics [physics]/Physics [physics]/Fluid Dynamics [physics.flu-dyn] Ignition system Combustor [PHYS.MECA.THER]Physics [physics]/Mechanics [physics]/Thermics [physics.class-ph] Current (fluid) Phase velocity Large eddy simulation |
| Popis: | The current work presents the Large Eddy Simulation (LES) of a kerosene spray ignition phase in a simplified aeronautical combustor for which detailed experimental data are available. The carrier phase is simulated using an unstructured multi-species compressible Navier-Stokes solver while the dispersed liquid phase is modeled with a Lagrangian approach. An energy deposition model neglecting the presence of a plasma phase in the very first instants of the energy deposition process, a reduced kinetic scheme and a simplified spray injection model are combined to achieve both a reasonable computational expense and a satisfactory overall accuracy. Following a brief description of the validation of these models, non reactive gaseous and two-phase flow LES’s of the target combustor are performed. Excellent agreement with experiments is observed for the non reactive gaseous simulations. The dispersed phase velocity fields are also well reproduced while discrepancies appear for the spatial size distribution of the particles. Finally, numerical snapshots of a successful ignition phase are shown and discussed. |
| Databáze: | OpenAIRE |
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