Engine Module Validators.
The ENOVAL project will provide the next step of engine technologies to achieve and surpass the ACARE 2020 goals on the way towards Flightpath 2050. ENOVAL completes the European 7th Framework Programme (FP7) roadmap of Level 2 aero engine projects and will focus on the low pressure system of ultra-high by-pass ratio propulsion systems (12 < BPR < 20) in conjunction with very high overall pressure ratio (50 < OPR < 70) to provide significant reductions in fuel consumption (-3% to -5%), CO2 emissions (-3% to -5%) and noise (-1.3 dB). ENOVAL concentrates on ducted geared and non-geared turbofan engines being among the best candidates for the next generation of short/medium range and long range commercial aircraft applications with an entry into service date of 2025 onward. The expected fan diameter increase of 20 to 35% (vs. year 2000 refernece engine) is significant, but can be accommodated within the limits of a conventional aircraft configuration. It is therefore in line with the roadmap of the Strategic Rearch and Innovation Agenda for 2020 to have the technologies ready for “Optimised conventional aircraft and engines using best fuel efficiency and noise control technologies”. ENOVAL will be established in a consistent series of Level 2 projects in conjunction with LEMCOTEC for core engine technologies and E-BREAK for system technologies.
The global objective of the ENOVAL project is twofold: reducing the CO2 emissions and the perceived noise of future aero engines:
- To contribute to the aero engine CO2 reduction by 5% alone achieving, compared to technologies representative of year 2000, a cumulated CO2 reduction of 26% for long range applications including the achievements of past and currently ongoing projects such as EEFAE, VITAL, NEWAC, DREAM, LEMCOTEC and E-BREAK. For short/medium range turbofans the CO2 reduction will be 3% alone.
- To contribute to the overall reduction of engine noise emission by 1.3 EPNdB alone achieving a cumulated reduction of 9.3 EPNdB including the achievements of SILENCER, VITAL, DREAM and OPENAIR.
In order to achieve these overall objectives, innovative low-spool technologies with their specific individual contributions have been defined, which – as an overall purpose of ENOVAL – are to be successfully validated at a component level up to TRL5.
ENOVALs high level fuel burn and noise objectives will be enabled by the following three breakthroughs and contributing technologies:
- Expanding the design space for turbofans up to BPR 20
by novel very low pressure ratio fan module design features, such as advanced fan blades optimized in numbers, shape and weight together with new light weight Intermediate Case and new passive acoustic devices in the fan module
holistic design concepts for shorter and thinner nacelle with enhanced integration of engine, pylon and airframe to counter the penalties of additional weight and drag
Improved LP-turbine designs for direct drive solutions including novel aerodynamics, noise liners and materials for increased temperature.
- Enabling a geared fan drive system for the very large, long range engines
optimized gearbox heat management to reduced windage losses
advanced high load high speed booster including casing treatments
integrated improved aerodynamic, noise and mechanical design of Inter Turbine Case(ITC), high speed Low Pressure Turbine (LPT) and Turbine Exit Case (TEC) for reduced module length and increased performance
- Introduction of Variable Area Fan Nozzle (VAFN) to allow low pressure ratio fans
Integrated aerodynamic and mechanical optimization
Optimized control strategies for operability and performance