Analysing and developing turbomachinery at off-design conditions requires the usage of robust and efficient Computational Fluid Dynamics (CFD) solvers. With the introduction of the computer, many advancements have been made in the field of numerical methods involving these flow problems. These numerical methods are used in order to solve these comp...
RANS turbulence models are assessed here in simulations of simplified configurations representative of geometries and flows found in tip shrouds of low-pressure turbines rotor blades. The complex flow inside a tip shroud is highly turbulent, its boundary layer separates at the sharp angled tangential fins and reattaches in the inter-fin cavity afte...
This article deals with the zonal detached eddy simulation of the fan module of a modern turbofan engine for the prediction of the broadband noise due to the interaction of the fan turbulent wakes with the stationary outlet guide vanes. The simulation relies on a hybrid RANS/LES approach with a zonal strategy: the core airflow is treated in RANS, w...
Le givrage est un des phénomènes atmosphériques les plus sévères pour les aéronefs et les moteurs. Les évolutions récentes de la réglementation ont étendu les exigences de certification au cas des cristaux de glace. Pour ces conditions, les moteurs d’avion doivent démontrer un fonctionnement robuste en vol. Contrairement aux gouttes en surfusion re...
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...
This paper presents a hybrid grid strategy for the CFD modeling of complex technological effects which can be encountered on turbomachinery applications. It consists in mixing within the computational domain structured and non structured zones which are connected with conformal matching frontiers. The main channel flow path is meshed with a classic...
Afin d'améliorer les caractéristiques d'une turbomachine, il est capital de prévoir correctement les écoulements secondaires et/ou transitionnels s'y développant. Ces écoulements peuvent être à l'origine de la réduction de ses performances et de son domaine de fonctionnement. A titre d'exemple la présence de tourbillons de jeu ou de décollements de...
Some possible future High Fidelity CFD codes for LES simulation of turbomachinery are compared on several test cases increasing in complexity , starting from a very simple inviscid Vortex Convection to a multistage axial experimental compressor. Simulations were performed between 2013 and 2016 b y major Safran partners (Cenaero, Cerfacs, CORIA and ...
The present study aims at characterizing the flow field and heat transfer for a schematic but realistic vane cooling scheme. Experimentally, both velocity and heat transfer measurements are conducted to provide a detailed database of the investigated configuration. From a numerical point of view, the configuration is investigated using isotropic as...
