An extraordinary technological effort to define propulsion systems of the future that minimise environmental impact and energy consumption

Challenge/Domain
Challenge: 
Protecting the environment and the energy supply
Domain category: 
Technology
Enabler
Enabler: 
An extraordinary technological effort to define propulsion systems of the future that minimise environmental impact and energy consumption
Cluster of enablers: 
An extraordinary technological effort to define the air vehicles of the future that minimise environmental impact and energy consumption
Capability
Capability: 
To dramatically reduce the environmental impact and fuel consumption of aero gas turbines
Sub capability: 
To dramatically reduce Aircraft Noise associated with the propulsion systems in the vicinity of airports
R&I needs: 
- Close remaining gaps in the understanding of all noise generation mechanisms at source level - Develop high fidelity CAA modelling capability and integrate into desgin optmization capability at system and subsystem level - Evaluate and verify technologies at subsystem level for noise source reduction and noise attentuation devices - Adaptive/Active noise control - morphing structures
Achievements
2020: 
* Development of noise prediction and integrated system capability for Open Rotors * Development of noise prediction and integrated system capability for VHBR powerplants: - Low speed / low PR fan - Fan design for reduced broadband noise * Intake, bypass and exhaust duct optimisation - Low noise intake designs: - Zero and negative scarfed - Minimised fan noise component of cabin noise - Acoustically-lined intake lip - Advanced acoustic liners : thin, effective, heat resistant, light weight, extension of effective liner area - Optimised lean burn combustion noise dampers - Multi-dimensional optimisation of bypass system for noise, performance and structural effectiveness * Low noise bleed valve design capability * Low Jet Noise : Installed 3D nozzles * Maturity of RANS CFD / CAA for use within noise design systems (fans, LPT, open rotor, intakes, bypass and exhaust ducts, jet noise and installation effects (on fuselage, wing, pylon & empennage) for low noise
2035: 
* Airframe/nacelle/engine multi-disciplinary optimisation * Development of noise prediction and integrated system capability for UHBR powerplants * Wake control to reduce interaction noise for fans (e.g. trailing edge passive) and open rotor (e.g. pylon blowing adaptive) * Flow control for reduced broadband noise * Variable pitch fan * Combustion and IP System Noise Control * Variable area nozzle noise performance * Acoustic adaptive control : Morphing structures (Airframe/Nacelle/Engine), Adaptive Nozzles (Moving Chevrons), Chevrons with microjets, adaptive exhaust system (nozzle/mixer), HLD technologies * Acoustic active control : Active stators, liners * Maturity of LES CFD / CAA for use within noise design systems
2050: 
. Low Noise Aircraft Configurations (Blended Wing Body)
Key Performance Indicator: 
-50%(-10 EPNdB per op) in 2020 -53% (-11 EPNdB per op) in 2035 -65% (-15 EPNdB per op) in 2050 + TBD % improvement on NAP Implementation Progress Indicator

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