Акимов, И. А. Данилов, А. В. Акимов, А. И.
This work examines modern approaches in the study of the third phase of the polymerization process of composite structures for the manufacture of construction equipment during the exploitation of oil and gas fields and provides a statement of the problem of the third stage of polymerization for a cylindrical product made of composite structures in ...
Старцев, Г. Р. Исаков, С. Н.
To increase energy efficiency the use of thermoplanes is proposed. The calculation of the consumed power is presented as well as the hydrodynamic processes in a rotating cylinder are modeled. / Для увеличения энергоэффективности предлагается использование термопланок. Представлен расчет затрачиваемой мощности, а также смоделированы гидродинамически...
Katsamis, Constantinos
The present thesis focuses on the CFD analysis of natural circulation flows that are related to the passive safety loops of the forthcoming generation of water nuclear reactors. These flows involve inherent unsteadiness, laminar-to-turbulent transition and thermal stratification phenomena. As an initial validation study, a range of models that solv...
Gelain, Matteo Couilleaux, Alexandre Errera, Marc Vicquelin, Ronan Gicquel, Olivier
Surface air-cooled oil coolers (SACOC) are one of the reference technologies adopted in modern turbofan engines to meet the lubricant-cooling requirements. Installed in the by-pass duct, the SACOC are usually composed of a series of staggered fins dissipating the heat load of the engine oil through forced convection with the by-pass flow. Due to th...
van Ghèle, Loïc
Les modèles développés pour l'étude des rentrées atmosphériques sont essentiellement basés sur des mesures en soufflerie. Bien que ces dernières soient riches en enseignements, elles ne sont pas représentatives de l'ensemble des conditions rencontrées lors d'une rentrée atmosphérique. Pour combler ce manque de données il est nécessaire de traiter d...
Laroche, Emmanuel Reulet, Philippe Donjat, David Deliancourt, Frédéric Chassagne, Amélie Boutaleb, Mohamed
In the context of the ever increasing need to enhance engine cooling capability, a new heat exchanger/OGV architecture was defined and evaluated in CS2 framework. The design was validated based on wind tunnel tests carried out at ONERA Modane on two heated configurations. The numerical modelling of those tests confirms the expected thermal performa...
Durand, Jean-Etienne Raynaud, Florent Lestrade, Jean-Yves Anthoine, Jérome
A new fuel regression model, based on the mass/energy balance at the fuel surface, is implemented in the computational fluid dynamics software CEDRE. The modeling aims at generalizing a practical use of the fuel regression model to improve, by means of numerical simulations, the knowledge about aerothermochemical phenomena in hybrid rocket engines....
Crouzy, Gaétan Desarnaud, Fabien Laroche, Emmanuel Millan, Pierre
An experimental test campaign has been conducted by Safran and ONERA in order to generate a database on an annular effusion cooling system. Different effusion cooling patterns have been tested in various flow field conditions, representative of those encountered in real aeronautical combustors in terms of Reynolds number in the perforations, blowin...
Collette, Jean-Paul Rochus, Pierre Steelant, Johan Peyrou-Lauga, Romain Nutal, Nicolas Andro, Jean-Yves Nadalini, Ricardo Romero Fernandez, Pedro
From the launchers to the spacecrafts, various on-board systems have to be maintained within specified temperature limits. Phase Change Materials (PCM) offer the possibility to store thermal energy directly as latent heat of fusion. Among the advantages of a PCM device are the stability of temperature control, the absence of moving parts and a redu...
Salem, Rami Marty, Julien Errera, Marc
The high-pressure (HP) turbine and compressor blades are subjected to severe aero-thermal loads either caused by high inlet temperature resulting from the combustion chamber or by the shock wave at the blade surface. In this paper, a partitioned conjugate heat transfer (CHT) approach is used to assess 3D cases with high temperature gradient. On one...