Presented to:

By:Date:

Fede

Continuous Lower AdmEnergy, Emissions and Noise (CLEEN) Program

Program Update

REDAC E&E Subcommittee

Levent Ileri, CLEEN Program Manager

March 26, 2014
Federal AviaAdministrat

Outline

• Aviation Environmental Goals• CLEEN Overview and Goals• Completed Technology Demonstration• CLEEN Technologies Updates• CLEEN II Update• Summary
Federal AviaAdministrat

P1: Improved Scientific Kno

Integrated Modeling

P2: New Aircraft TechnologiP3: Sustainable Alternative P4: Air Traffic Management 

and Operational Improv

P5: Policies, Environmental 

Market Based Measures

• Absolute reduction of significant community 

noise and air quality emissions impacts

• Improve NAS energy efficiency and, supply of 

and access to, alternative fuel sources

• Limit or reduce the impact of aviation 

Greenhouse Gas (GHG) emissions on the global climate

• Reduce significant aviation impacts 

associated with water quality

NextGen Environmental Goals NextGen 5 Pillar Env

Aviation Environmental Goals and So

NOISE AIR QUALITY WATER QUALITY ENERGY 
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• 5 yr effort to accelerate technology comm• Reduces aircraft fuel burn, emissions and • Renewable alt fuels, and alt fuel engine te• 50% cost share; total FAA budget: ~$125

Continuous Lower Energy, Emissions and Noise 

Boeing-Ceramic Matrix Composite (CMC) Nozzle

-Adaptive Trailing Edge

General Elec-Twin AnnulaSwirler (TAPNOx Combus-Open Rotor-Flight ManaSystem / Air Integration-Flight ManaSystem / EngIntegration

Pratt & Whitney -Ultra-high Bypass Ratio Geared Turbofan Rolls-Royce

-Ceramic Matrix Composite (CMC) Blade Tracks-Dual-Walled Turbine Airfoils

Honeywell-Increase engine efficiency, reduce engine weight, higher temp engine, improved higher turbine cooling 
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CLEEN Program Goals

CORNERS OF THE 

TRADE SPACE

CLEEN (N+1)

(EIS 2015-18)

N+2

(2020)*

Noise

(cum below Stage 4) -32 dB -42 dB 

LTO NOx Emissions 

(Below CAEP 6) -60% -75% be

Aircraft Fuel Burn -33% -50% be

Ref: B737/CFM56-7B

Develop and demonstrate (TRL 6-7) certifiable aircraft 

* Technology Readiness Level (TRL) for key technologies = 4-6

Ref: B777-200/GE-90

Advance use of “drop-in” renewable alternative 

Bio feedstock Fuel Production 
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Completed Technology Demos

Dec Jan Sep

2011 2012 

TAPS II Core Engine 

Test (TRL 6)

Open Rotor Wind 

Tunnel Tests (TRL 5)

Landing and 

Takeoff NOx

reduced 60% re 

CAEP 6

Met CLEEN Goal

Ceram

Compos

Ground T

Adaptive Trailing EdgeFlight Demonstration(TRL 7)

Fe
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CLEEN Technology Assessment Crit

• Vetted tools 

compatible w/ AEDT

• Environmental 

perf & benefits at aircraft & fleet level

• Can identify 

synergistic technologies

• Can refine 

models with proprietary data

Subsystem 

Technology 

Impacts

Technology 

Effects on 

Vehicle

+

+

Single-Aisle

Regional Jet

Small Twin-Aisle

Large Twin-Aisle

Very Large Aircraft
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Role of Technology Assessm

• Develop tools for effective technology assess• Assess suitability, environmental benefits and 

of aircraft technologies & alternative fuels on

– Aircraft performance – Fleet operations– Environmental and economic policy – Global climate change

• Evaluate production costs & timeframes for n

aircraft designs

• Compare tool results with CLEEN company es• Foster collaboration and consensus among a

commercial and governmental institutions
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GE CLEEN Technologies Updates

TAPS II Combustor• Completed design, manufacture, 

lab rig, sector, full combustor rig, and engine core test (TRL 6)

• Demonstrated in rig and core 

engine test > 60% NOx margin to CAEP/6, exceeding CLEEN goal.

Open Rotor• Completed design, fabrication, and 

wind tunnel testing of modern scaled blades in partnership w/ NASA

• Fuel burn & noise significantly 

reduced for M=0.8 flight quieter than current single aisle aircraft

Images courtesy of GE Aviation

Targeburnand nreduc
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GE CLEEN Technologies Updates

FMS/ATM Integration• Completed Dynamic Quiet Climb & 

Wind Input Optimization

• Completed Trajectory Sync 

Simulation (TRL 6)

2014 Activities:• Trajectory optimizationFMS/Engine Integration• Adaptive engine control• Vehicle health management• Flight-propulsion control2014 Activities: • Further development, preparation 

for engine testing Targeted fuel burn and noise 

Images courtesy of GE Aviation and Aviation Systems
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Boeing CLEEN Technologies Updates

Accomplishments:• Adaptive trailing edge project 

complete (TRL 7), including flight demo

• CMC nozzle ground test 

complete (TRL 6)

• Alternative fuel material 

compatibility testing complete

2014 Activities:• CMC exhaust nozzle flight test 

(TRL 7)

• CMC exhaust nozzle second 

design cycle and fabrication trials

Targeted fuel burn and noise 

Ph

Images courtesy of Boeing
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P&W CLEEN Technologies Updates

Wind Tunnel Tests G

Ultra High Bypass G

Turbofan (GTF

Ultra High Bypass Geared Turbofan with Advanced Fan System• Completed technology and 

demonstrator engine detailed design

2014 Activities:• Hardware fabrication, test planning 

for demonstrator engine

• Fan rig test preparationAlternative Jet Fuels• Engine and combustor testing of 

alternative jet fuels from multiple production pathways

Targeted fuel burn and noise 

Images courtesy of Pratt & Whitney
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Honeywell CLEEN Technologies Updates

High T3 

Impeller

• Low leaka• Advanced 

Fuel Burn Reduction Technologies• Achieved TRL 6 for alloy 10 

turbine disk material

2014 Activities:• Core and engine tests to bring 

other technologies to TRL 6

• Alt fuel testingAlternative Jet Fuels• Completed study on impact of 

aromatics on materials

• Completed biofuel Life Cycle 

Analyses (LCA) with MIT Targeted fuel burn re

Images courtesy of Honeywell
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Rolls-Royce CLEEN Technologies Updates

Blade and dairfoils• Incre• Redu• Impr

Dual Wall Turbine Airfoils• Completed casting trials• Completed preliminary design2014 Activities:• Detailed design• Initial hardware deliveryCMC Blade Tracks• First ground engine test complete2014 Activities:• Further testingNovel Alternative Fuels Project• Lab, rig, and APU testing complete

Targeted fuel burn re

Images courtesy of Rolls-Royce
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• CLEEN has already successfully accelerated 

environmentally beneficial technology develo

– TRL 5 wind tunnel tests demonstrated open rotor signif

reduces fuel burn and noise without reducing cruise sp

– TRL 6 engine demo shows TAPS II combustor meets N

reduction goal and is expected to enter service in 2016 

– TRL 6 engine demo of CMC exhaust nozzle showed go

structural performance (i.e., RR blade tracks)

– TRL 6 simulation of flight management system / air traf

trajectory synchronization was a success

– TRL 7 flight test shows ATE improved aero performanc

• Based on success FAA plans to pursue CLEE• CLEEN II could provide additional interagenc

collaboration opportunities

CLEEN and Next Steps
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CLEEN vs CLEEN II Program Go

CORNERS OF THE 

TRADE SPACE

CLEEN 

2010-2015 

CLEEN II

2015-2020 

Noise

(cum below Stage 4) -32 dB -32 dB

LTO NOx Emissions 

(Below CAEP 6) -60% -75%

Aircraft Fuel Burn -33% -40%

Develop and demonstrate (TRL 6-7) certifiable aircraft 

* Technology Readiness Level (TRL) for key technologies = 4-6

Advance use of “drop-in” renewable alternative 

Bio feedstock Fuel Production 
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CLEEN II

• Program model based on successful CLEEN I

– Requires cost share and tech maturation from TR

demonstration at TRL 6-7

– Program work conducted 2015-2020– Requires industry to show path to commercial pr

tech realizes benefits in the fleet with EIS 2020-2

• Milestones:

– Market survey conducted May-July 2013– Draft solicitation released publicly November 201– Industry day held in Washington D.C. December – Obtaining internal approvals for planned release 

solicitation early summer 2014

– Contract award and work planned to begin May 2
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Questions