Évaporation de gouttelettes polydispersées dans un écoulement de canal fortement turbulent : analyse de la formation du mélange diphasique par imagerie de fluorescence

TL;DRAbstract

A model experiment for the study of evaporating turbulent two-phase ows is presented here. The study focuses on a situation where pre-atomized and dispersed droplets vaporize and mix in a heated turbulent ow. The liquid mass loading of the carrier ow is set su ciently low to avoid two-way coupling where the droplets have an e ect on the dynamic and the turbulence of the carrier ow. The carrier ow is heated in order to have vaporization of the droplets. Last, there is no combustion For this study, a model experimental test bench was conceived to generate a highly turbulent carrier ow. It consists in a channel ow with caracteristics of homogeneous and isotropic turbulence where uctuations' levels are very high. These levels range as high as 25 % in the established homogeneous and isotropic zone, which is much higher than those commonly obtained with a classical grid turbulence. The characterization of this gaz ow was realized with Particles Image Velocimetry (PIV). An injection system us

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