Modeling and Validation of the Oil Control Ring Performance of a Rotary Engine

The Wankel rotary engine has long been seen as a good engine for aeronautical application, but sealing problems is still a challenge that limits its utilisation. Minimizing oil consumption in rotary engine is essential to limit hydrocarbon emissions and minimize overall mass of the engine. Internal oil leaks from the crankcase to the combustion chamber represent about half the oil consumptions in rotary engines and thus represent the low hanging fruit to minimize oil consumptions. This project aims at improving oil sealing of the rotary engine to enable its use in aircraft applications.

Data fusion strategies for reducing the uncertainty of point cloud data

For decades, contact probes on coordinate measuring machine (CMM) have been widely used for data acquisition in coordinate metrology, mainly because of their high accuracy. However, the acquired data is a low-density set of points, because sampling using a contact probe is a slow process. Nowadays, optical 3D scanning technologies such as structured-light scanners or laser scanners are increasingly included in metrology applications for rapidly capturing high-density point clouds enabling holistic measurements of a manufactured part.

oN DuTy! – Innovative Program on NonDestructive Testing (NDT) – Part 2

NonDestructive Testing (NDT) is a key discipline in major industrial sectors to ensure quality and safety. Several methods are regularly employed in areas ranging from x-ray or ultrasound testing of metallic or composite components in the automotive and aerospace industries, to the inspection of petrochemical ducts using eddy currents or acoustical emissions. The present proposal combines different NDT-related subjects under the oN DuTy!

Development of Computational Fluid Dynamics Methodology for Management of Oil Tanks and the Separation of Air and Oil in an Aero-Engine

Oil is used in aircraft engine applications to lubricate and carry the associated parasitic heat generated away from the moving components. Inefficient lubrication can cause an increase of heat transferred to the metal components by friction while too much oil can cause an increase of the heat generation by churning. The churning of oil leads to the entrainment of air. Oil temperature rise leads to generation of foam.

Création de stratégies démonstratrices hybrides de conception et fabrication d'outillages aérospatiaux

La fabrication de pièces aérospatiales présente plusieurs défis importants, dont ceux du délai et du coût de réalisation. Dans le contexte économique d'aujourd'hui, `bien faire du premier coup` est impératif pour maintenir la compétitivité des entreprises. La recherche de l'efficience est alimentée par diverses opportunités provenant de technologies émergentes telles que l'assemblage par métrologie 3D, la fabrication additive (FA) et la fabrication hybride (FH) lesquelles proposent une multitude de possibilités ayant un potentiel significatif.

Étude de l’erreur humaine dans le processus d’assemblage de moteurs d’avions

Tout au long de l’histoire de l’humanité le progrès scientifique et technique a été un moteur de notre évolution comme espèce. Ce progrès pousse l’humain constamment à reconsidérer ses propres limites tant du point de vue physique que cognitif. Bien que les conséquences des actions erronées des humains soient connues depuis l’antiquité, industrie 4.0 mène à un changement de paradigme de production. Il s’ouvre à nous, entre autres, de nouvelles possibilités pour réduire l’occurrence des dites erreurs via diverses technologies numériques.

Desensitization of axial compressor performance and stall margin to tip clearance gap increase

The degradation in performance and operating envelope of aero-engines with age and during critical transient operating conditions such as take-off is a well-known phenomenon. It is mainly caused by the increase in size of the tiny gap between the tip of the compressor rotor blades and the shroud, called tip clearance, from wear and/or shroud thermal expansion, which results in a drop of compressor pressure rise, efficiency and safety margin against aerodynamic instabilities.

Desensitization of aero-engine performance and stall margin to tip clearance gap increase

The degradation in performance and operating envelope of aero-engines with age and during critical transient operating conditions such as take-off is a well-known phenomenon. It is mainly caused by the increase in size of the tiny gap between the tip of the compressor rotor blades and the shroud, called tip clearance, from wear and/or shroud thermal expansion, which results in a drop of compressor pressure rise, efficiency and safety margin against aerodynamic instabilities.

Développer et calibrer un outil de prédiction aéroélastique d'ailettes assujetties à des excitations vibratoires induites par les sillages amont et aval des redresseurs adjacentes dans un compresseur

PWC effectue des tests sur les compresseurs lors du développement de ses moteurs afin de mieux connaître les niveaux vibratoires des ailettes en fonctionnement. Le but de ce projet de recherche est de développer une méthode numérique basée sur des considérations aéroélastiques et capable de prédire efficacement ces niveaux vibratoire afin de limiter la voie expérimentale. Des logiciels performants de dynamique des structures et dynamique des fluides seront mis à contribution pour le calcul des effets d’un écoulement d’air sur une structure vibrante.

Evaluation of Cryogenic Machining and High Pressure Cooling in Turning of Hard-To-Cut Materials

The main objective of this project is to investigate the performance of LiN-cryogenic technologY, as well as, high pressure cooling (HPC) in turning of hard-to-cut aerospace materials. The performance of cryogenic machining and HPC will be compared to flood coolant to establish the optimum conditions for each cooling technique, in terms of material removal rate, tool life, and surface integrity (surface finish, microstructure and residual stresses).

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