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Etude numérique des transferts conjugués paroi-fluide d'un écoulement e fluide compressible dans une tuyère

Abstract : This work concerns the study of flows of compressible gaseous laminar subsonic-supersonic nozzle in a convergent-divergent type. The flows are studied to moderate Reynolds numbers and free themselves from the assumption of adiabatic wall conditions commonly used to better take into account the phenomena of heat transfer by convection and radiation with the external environment. This study combined transfer phenomena was determined simultaneously the dynamic behavior of the fluid and the wall of the nozzle. Finally, given high levels of temperatures at stake in these systems, an analysis of the thermomechanical behavior of the entire wall structure with monolayer and multilayer materials was performed. Many geometric configurations, physical properties and boundary conditions on the fluid and the wall were analyzed. The results presented show the structure of the flow through the iso-contours of speed, Mach numbers, pressures in the fluid, temperatures in the fluid and in the wall as well as the deformations and stresses resulting from the wall thermomechanical couplings. A performance analysis of the nozzle, in terms of thrust coefficient and specific yield, is widely discussed in this work.
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Jing Deng. Etude numérique des transferts conjugués paroi-fluide d'un écoulement e fluide compressible dans une tuyère. Autre [cond-mat.other]. Université de Technologie de Belfort-Montbeliard, 2011. Français. ⟨NNT : 2011BELF0162⟩. ⟨tel-00720654⟩

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