Large-Eddy Simulation of transcritical flows |
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Authors: | T Schmitt L Selle B Cuenot T Poinsot |
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Institution: | aCERFACS, 42, avenue Gaspard-Coriolis, 31057 Toulouse cedex 01, France;bInstitut de mécanique des fluides de Toulouse, allée du Professeur-Camille-Soula, 31400 Toulouse, France |
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Abstract: | The present study uses the LES code AVBP, developed at CERFACS, to simulate transcritical flows. Real gas effects are accounted for by the use of a cubic equation of state, in conjunction with appropriate viscosity and thermal conductivity coefficients. First a single nitrogen round jet at supercritical pressure injected in a gaseous reservoir is simulated. Two cases are considered, one demonstrating a transcritical injection (high density injection), the other being directly injected at supercritical temperature (lower density injection). Comparison with available measurements shows good agreement. Finally, the simulation of a reacting case from the Mascotte bench (ONERA) is performed, consisting in a single coaxial injector injecting transcritical oxygen and supercritical hydrogen in a 60 bar chamber. Mean flow characteristics are in good agreement with the experimental observations of OH* emission, whereas temperature comparisons are more difficult to interpret. To cite this article: T. Schmitt et al., C. R. Mecanique 337 (2009). |
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Keywords: | Combustion Computational fluid mechanics Large-Eddy Simulation SupercriticalMots-clé s: Combustion Mé canique des fluides numé rique Simulation des grandes é chelles Supercritique |
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