Next Generation Engines

Rolls-Royce Proprietary information
Next Generation Engines
Mark Thomas CEng FRAeS
Chief Engineer – Technology and Future Programmes
© 2014 Rolls-Royce plc
The information in this document is the property of Rolls-Royce plc and may not be copied or communicated to a third party, or used for any purpose other
than that for which it is supplied without the express written consent of Rolls-Royce plc.
This information is given in good faith based upon the latest information available to Rolls-Royce plc, no warranty or representation is given concerning
such information, which must not be taken as establishing any contractual or other commitment binding upon Rolls-Royce plc or any of its subsidiary or
associated companies.
Trusted to deliver excellence
Rolls-Royce Proprietary Information
information
World air traffic growth
Rolls-Royce Proprietary
proprietary information
Information
3
2050 environmental goals
007204
Rolls-Royce Proprietary Information
information
A successful journey
Trent
engine
family
Rolls-Royce Proprietary
proprietary information
Information
Relentless pursuit of improvements
Rolls-Royce Proprietary Information
information
Efficiency improvements - cycle potential
0.7
0.700
Specific Fuel Consumption lb/hr / lbf @ 0.8Mn
0.65
Current High
Bypass ratio
Engines
0.6
Higher Pressures,
Temperatures,
Efficiencies
0.55
0.5
Novel Core
Systems
0.45
Higher bypass
ratios
Novel LP Systems
Approaching
Theoretical
Limit of
Propulsive
Efficiency
0.4
0.35
0.3
Propulsive
Efficiency
Approaching
Theoretical Limit of
Thermal Efficiency
Rolls-Royce Proprietary Information
information
Thermal “Cycle”
Efficiency
Rolls-Royce Proprietary information
Driving for higher efficiency
Can we align the video and the next slide
Rolls-Royce Proprietary Information
information
Rolls-Royce Proprietary information
UltraFanTM – further technology advances
Rolls-Royce Proprietary Information
information
Variable pitch UltraFanTM
Variable Pitch Fan Advantages
Nacelle and Fan Case
Slimline Nacelle
Thinner, Shorter
Outer Cowls
• Facilitates low pressure ratio fan
operability
• Eliminates requirement for VAN
• Enables deletion of thrust reverser
• Facilitates slimline nacelle
Very High
Bypass
Ratio
Pitch Change
Mechanism
Variable Pitch Fan Challenges
• Fan aerodynamics
• Complex rotating pitch change
mechanism
• Challenging reverse thrust
Reduction Gearbox
Reverse thrust mode requires
flow to turn sharp lips of cold
nozzle & core splitter
Rolls-Royce Proprietary Information
information
EXPORT CONTROLLED – NLR per EAR99
Next generation product evolution
Advance
UltraFan™ / Open Rotor
Technology EIS Readiness
2020+
2025+
Bypass Ratio
11+
15+
Overall Pressure Ratio
60+
70+
Efficiency relative to Trent 700
20%+
25%+
Trent XWB
World’s most
efficient engine
Rolls-Royce Proprietary Information
information
007638
Leading technologies and capabilities
Lightweight CTi Fan
System & Externals
Advanced
Materials
(CMCs, Ni Alloys)
Lean Burn
Combustion
VHBR
Enablers
Electrical,
Controls, EHM
& Systems
Integration
Advance Core
Architecture
Key Benefits
Fuel Burn
Advanced
Manufacturing
Research Centres
Virtual Engine
(Design & Validation
in the Computer)
Environment
Maintenance
Lifecycle Cost
Additive Layer
Manufacturing
Rolls-Royce Proprietary
proprietary information
Information
Aerothermal
Excellence
Comprehensive full scale demonstration
ALPS
Advance
EFE
Rolls-Royce Proprietary
proprietary information
Information
ALECSYS
UltraFan
Novel propulsion concepts
Image courtesy of NEWAC
Rolls-Royce Proprietary Information
information
Integration challenges and opportunities
Trent XWB
Advance
UltraFan™
Source: Boeing/NASA
Rolls-Royce Proprietary Information
information
Open Rotor
Source: Airbus
Hybrid turbo-electric propulsion
Gas turbine &
generator
Electrical energy
storage system
Electrically driven
Propulsive fans
E-Thrust Concept
Rolls-Royce Proprietary Information
information
Rolls-Royce Proprietary Information
information
Better Power for a Changing World
Rolls-Royce proprietary information