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Rolls-Royce Proprietary information


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© 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.

Mark Thomas CEng FRAeS

Chief Engineer – Technology and Future Programmes

Next Generation Engines

Rolls-Royce Proprietary Information

Rolls-Royce proprietary information

3

World air traffic growth



2050 environmental goals

007204



Trent

engine

family

A successful journey



Relentless pursuit of improvements



0.3

0.35

0.4

0.45

0.5

0.55

0.6

0.65

0.7Sp

ecif

ic F

uel

Co

nsu

mp

tio

n lb

/hr

/ lb

f @

0.8

Mn

Thermal “Cycle”

Efficiency

Propulsive

Efficiency

0.700

Current High

Bypass ratio

Engines

Approaching

Theoretical

Limit of

Propulsive

Efficiency

Higher bypass

ratios

Novel LP Systems

Higher Pressures,

Temperatures,

Efficiencies

Novel Core

Systems

Approaching

Theoretical Limit of

Thermal Efficiency

Efficiency improvements - cycle potential



Driving for higher efficiency

Can we align the video and the next slide



UltraFanTM – further technology advances



Nacelle and Fan Case

Slimline Nacelle Thinner, Shorter

Outer Cowls

Pitch Change

Mechanism

EXPORT CONTROLLED – NLR per EAR99

Very High

Bypass

Ratio

Reduction Gearbox

Reverse thrust mode requires

flow to turn sharp lips of cold

nozzle & core splitter

Variable Pitch Fan Advantages

• Facilitates low pressure ratio fan

operability

• Eliminates requirement for VAN

• Enables deletion of thrust reverser

• Facilitates slimline nacelle

Variable Pitch Fan Challenges

• Fan aerodynamics

• Complex rotating pitch change

mechanism

• Challenging reverse thrust

Variable pitch UltraFanTM



Next generation product evolution

Trent XWB Advance UltraFan™ / Open Rotor

World’s most

efficient engine

11+ 15+ Bypass Ratio

60+ 70+ Overall Pressure Ratio

20%+ 25%+ Efficiency relative to Trent 700

2020+ 2025+ Technology EIS Readiness

007638



Leading technologies and capabilities

Lightweight CTi Fan

System & Externals

Additive Layer

Manufacturing

Advanced

Materials

VHBR

Enablers

Advance Core

Architecture

(CMCs, Ni Alloys)

Aerothermal

Excellence

Lean Burn

Combustion

Fuel Burn

Environment

Maintenance

Key Benefits

Lifecycle Cost

Virtual Engine

(Design & Validation

in the Computer)

Advanced

Manufacturing

Research Centres

Electrical,

Controls, EHM

& Systems

Integration



Comprehensive full scale demonstration

ALPS Advance ALECSYS

EFE UltraFan



Novel propulsion concepts

Image courtesy of NEWAC



Integration challenges and opportunities

Trent XWB Advance UltraFan™ Open Rotor

Source: Boeing/NASA Source: Airbus



Gas turbine &

generator

Electrical energy

storage system

Electrically driven

Propulsive fans

Hybrid turbo-electric propulsion

E-Thrust Concept


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