Print Email Facebook Twitter Large Eddy Simulation of two-phase reacting flows Part of: ECCOMAS CFD 2006: Proceedings of the European Conference on Computational Fluid Dynamics· list the conference papers Title Large Eddy Simulation of two-phase reacting flows Author Cuenot, B. Boileau, M. Pascaud, S. Mossa, J.B. Riber, E. Poinsot, T. Bérat, C. Date 2006-09-06 Abstract Large Eddy Simulation (LES) is now recognized as an efficient numerical tool to predict gaseous combustion in industrial burners, and a number of examples of applications can be found in the literature. In these examples, the accuracy and the predictive capacity of LES are clearly demonstrated, even for unsteady phenomena. However most industrial burners are fed with liquid fuel and require the description of droplets dispersion, evaporation and burning. The presence of liquid fuel strongly modifies the fuel vapor distribution in the chamber, leading to different flame ignition and stabilisation processes, as well as different flame structures. Extending the LES technique to two-phase reacting flow is therefore crucial to capture and predict the behavior of such burners. This has been done in the code AVBP, coupling an eulerian solver for the liquid spray with a LES solver for the gas flow. This approach allows to work on unstructured grids and therefore to calculate the flow in complex geometries. In the present paper, the main steps of the extension of LES to two-phase flow are described and an example of validation is given. Then the solver is applied to the Vesta combustor of Turbomeca, composed of 18 main burners ignited by two pilot flames. This illustrates the capacity of LES to compute complex two-phase reacting flows in transient regimes. To demonstrate LES efficiency, some results will be shown for a calculation done on the IBM supercomputer BlueGene/L - cited by TOP500 as the world's fastest machine - where the use of 2048 parallel processors has enabled to start computing on the full combustor domain (i.e. 18 main injectors + 2 pilot flames). Subject fluid dynamicscombustiontwo-phase flowsLarge Eddy Simulation (LES)ignition To reference this document use: http://resolver.tudelft.nl/uuid:7d579184-9b9f-4cda-b7d1-15130892941b Part of collection Conference proceedings Document type conference paper Rights (c) 2006 Cuenot, B.; Boileau, M.; Pascaud, S.; Mossa, J.B.; Riber, E.; Poinsot, T.; Bérat, C. Files PDF Cuenot.pdf 5.5 MB Close viewer /islandora/object/uuid:7d579184-9b9f-4cda-b7d1-15130892941b/datastream/OBJ/view