The main objective of this PhD thesis is the study of Diesel sprays under
evaporative conditions by means of Large Eddy Simulations (LES) techniques.
This study has been performed implementing a precise, low-demanding LES
model in the free, full-purpose Computational Fluid Dynamics (CFD) code
OpenFOAM.
The starting point was a careful and exhaustive review of the physical processes
involved in sprays. An emphasis in CFD methodology, particularly for
LES methods, was essential for the thesis, as we were able to find the possible
problems and limitations of our approximation. Moreover, as the most
widely used techniques for the industrial simulation of sprays are based on
the Reynolds-Averaged Navier-Stokes models, we have highlighted the many
advantages of LES modeling. As the latter are, by definition, more computationally
expensive than RANS, we made an optimal configuration that, while
it is able to recover accurately the experimental results, its characteristic time
is in the same order of magnitude that RANS ones. As applicability is a must
in this thesis, we use the surname ¿Engineering¿ LES.
One of the key points of the thesis has been the correct configuration of
the flow turbulent conditions on the inlet. In order to get accurate results,
the turbulent structures coming from this inlet need to be time- and spacecoherent.
An adequate calibration of this conditions is needed to perform any
spray simulation.
Last but not least, all the simulations performed where validated against
experiments, obtaining a very good agreement even close to the nozzle / Mompó Laborda, JM. (2014). Engineering Large Eddy Simulation of Diesel Sprays [Tesis doctoral]. Universitat Politècnica de València. https://doi.org/10.4995/Thesis/10251/37345
| Identifer | oai:union.ndltd.org:upv.es/oai:riunet.upv.es:10251/37345 |
| Date | 09 May 2014 |
| Creators | Mompó Laborda, Juan Manuel |
| Contributors | Hoyas Calvo, Sergio, Universitat Politècnica de València. Departamento de Máquinas y Motores Térmicos - Departament de Màquines i Motors Tèrmics |
| Publisher | Universitat Politècnica de València |
| Source Sets | Universitat Politècnica de València |
| Language | English |
| Detected Language | English |
| Type | info:eu-repo/semantics/doctoralThesis, info:eu-repo/semantics/acceptedVersion |
| Source | Riunet |
| Rights | http://rightsstatements.org/vocab/InC/1.0/, info:eu-repo/semantics/openAccess |
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