Modélisation de l'atomisation de pesticides appliquée à une buse à turbulence
| Autor: | M. de Luca, Ariane Vallet, Roland Borghi |
|---|---|
| Přispěvatelé: | Information – Technologies – Analyse Environnementale – Procédés Agricoles (UMR ITAP), Centre international d'études supérieures en sciences agronomiques (Montpellier SupAgro)-Centre national du machinisme agricole, du génie rural, des eaux et forêts (CEMAGREF), Laboratoire de Mécanique et d'Acoustique [Marseille] (LMA ), Centre National de la Recherche Scientifique (CNRS)-Aix Marseille Université (AMU)-École Centrale de Marseille (ECM), Aix Marseille Université (AMU)-École Centrale de Marseille (ECM)-Centre National de la Recherche Scientifique (CNRS), Centre National de la Recherche Scientifique (CNRS), Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Institut Agro - Montpellier SupAgro, Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro) |
| Jazyk: | angličtina |
| Rok vydání: | 2009 |
| Předmět: |
Materials science
Turbulence ATOMIZATION Sauter mean diameter Nozzle Fluid mechanics EULERIAN MODEL 04 agricultural and veterinary sciences 02 engineering and technology Mechanics Discharge coefficient HOLLOW CONE NOZZLE Spray nozzle [SPI.MECA.MEFL]Engineering Sciences [physics]/Mechanics [physics.med-ph]/Fluids mechanics [physics.class-ph] Physics::Fluid Dynamics 020303 mechanical engineering & transports 0203 mechanical engineering [SDE]Environmental Sciences 040103 agronomy & agriculture Mass flow rate 0401 agriculture forestry and fisheries [PHYS.MECA.MEFL]Physics [physics]/Mechanics [physics]/Fluid mechanics [physics.class-ph] Dispersion (water waves) |
| Zdroj: | Atomization and Sprays Atomization and Sprays, Begell House Inc., 2009, 19 (8), pp.741-753. ⟨10.1615/AtomizSpr.v19.i8.30⟩ Atomization and Sprays, Begell House Inc., 2009, 19 (8), pp.741-753. ⟨10.1615/AtomizSpr.v19.i8⟩ Atomization and Sprays, 2009, 19 (8), pp.741-753. ⟨10.1615/AtomizSpr.v19.i8.30⟩ |
| DOI: | 10.1615/AtomizSpr.v19.i8.30⟩ |
| Popis: | This paper presents a new approach to model the pesticide atomization in order to get the droplet size and velocity very close to the nozzle exit. The two-phase flow was calculated inside and outside the nozzle. The model was based on classical fluid mechanics transport equations for the liquid dispersion, velocity and turbulence. Moreover, a novel transport equation was developed for the mean liquid/gas surface area, coming from studies in automotive and aeronautics fields. Coupling the transport equations for the liquid mass fraction and the surface area led to an estimation of a Sauter Mean Diameter. These equations have been implemented in the commercial CFD code Fluent. A swirling flow was found inside the nozzle. Moreover, a hollow cone liquid sheet expanded outside the nozzle. Calculations have been conducted with various injection pressure values, leading to a mass flow rate in good accordance with manufacturer data. Surfactant influence has been studied by varying the surface tension coefficient in the surface area transport equation: as expected, droplets obtained are smaller than when water is considered. |
| Databáze: | OpenAIRE |
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