High efficiency, reduced fuel consumption and decreased noise and CO2 emissions can be achieved by the ultra-high-bypass ratio (UHBP) geared turbofan engine. The UHBP turbofan uses a planetary gear stage to decouple the fan RPM from the RPM of the turbine. However, moving parts generate friction and heat and therefore require lubrication systems. In-flight loss of lubrication could potentially lead to catastrophic damage.
The goal of LUBGEAR is to combine
- optimized gear geometry to provide low power loss conditions
- surface and material combinations providing low friction and surface treatment which can withstand off-design conditions
This new gear design can withstand off-design conditions without additional means such as secondary or auxiliary lubrication system through reduced friction losses and frictional heat.
This developed technology will advance over TRL 2 over Simulations and experiments at contact level up to TRL 3 through validation in an experimental component test rig.
- Gear coatings offered the highest increase in gear lifetime under loss of lubrication,
- Nitriding increased performance compared to carburizing,
- Superfinishing might have negative impact on LOL performance.
ADTs role in LUBGEAR:
- Elaboration of manufacturing plans and specification
- Analysis of results related to the manufacturing of gears
- Evaluation of results related to manufacturing, aviation operation and certification
- Overview of potential uses of project results, risk assessment, identification of market barriers and contact with potential users
- Dissemination activities (workshops, conference presentations)
LUBGEARs consortium consist of five strategic industrial and university partners who bring together their expertise in engineering, tribology, mechanics, and advanced chemistry.
Contact: Lorenz Braumann
Clean Sky 2 (Horizon 2020 – European Union funding for Research and Innovation
Project period: 01.01.2021 – 31.10.2023