Modelling and validation of near-field Diesel spray CFD simulations based on the Σ -Y model

[EN] Diesel spray modelling still remains a challenge, especially in the dense near-nozzle region. This region is difficult to experimentally access and also to model due to the complex and rapid liquid and gas interaction. Modelling approaches based on Lagrangian particle tracking have struggled in...

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Detalles Bibliográficos
Autores: Desantes J.M.|||0000-0002-4124-9393, García-Oliver, José M|||0000-0002-2676-9681, Pastor Enguídanos, José Manuel|||0000-0003-4458-0353, Pandal, A., Naud, B., Matusik, K., Duke, D., Kastengren, A., Powell, C., Schmidt, D.P.
Tipo de recurso: capítulo de libro
Fecha de publicación:2017
País:España
Institución:Universitat Politècnica de València (UPV)
Repositorio:RiuNet. Repositorio Institucional de la Universitat Politécnica de Valéncia
Idioma:inglés
OAI Identifier:oai:riunet.upv.es:10251/101597
Acceso en línea:https://riunet.upv.es/handle/10251/101597
Access Level:acceso abierto
Palabra clave:Sprays
Diesel
Atomization
CFD
OpenFOAM
X-ray
Descripción
Sumario:[EN] Diesel spray modelling still remains a challenge, especially in the dense near-nozzle region. This region is difficult to experimentally access and also to model due to the complex and rapid liquid and gas interaction. Modelling approaches based on Lagrangian particle tracking have struggled in this area, while Eulerian modelling has proven particularly useful. An interesting approach is the single-fluid diffuse interface model known as Σ-Y, based on scale separation assumptions at high Reynolds and Weber numbers. Liquid dispersion is modelled as turbulent mixing of a variable density flow. The concept of surface area density is used for representing liquid structures, regardless of the complexity of the interface. In this work, an implementation of the Σ-Y model in the OpenFOAM CFD library is applied to simulate the ECN Spray A in the near nozzle region, using both RANS and LES turbulence modelling. Assessment is performed with measurements conducted at the Advanced Photon Source at Argonne National Laboratory (ANL). The ultra-smallangle x-ray scattering (USAXS) technique has been used to measure the interfacial surface area, and x-ray radiography to measure the fuel dispersion, allowing a direct evaluation of the Σ-Y model predictions.

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