OCTOBER 10-12, 2013 AOPA AVIATION SUMMIT - Home - Aircraft Owners
Hughes Green Aviation Summit
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Transcript of Hughes Green Aviation Summit
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Geared Turbofan Technology
Chris Hughes
NASA EnvironmentallyResponsible Aviation Project
Green Aviation Summit
NASA Ames Research Center
September 8-9, 2010
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Geared Turbofan Technology Enables a Step-Changein Ultra High Bypass Propulsion
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Courtesy Pratt & Whitney
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Propulsion System Fuel Burn Drivers
Thrust Specific Fuel Consumption Need Higher Propulsive Efficiency,
Which is Achieved with Higher Bypass Ratio
WeightNeed Advanced, Lighter
Materials; Advanced , Smaller
Components; More Compact
Designs
Nacelle DragNeed Thinner,
Shorter Nacelles as Engine Bypass
Ratio and Fan Diameter Grow
InstallationNeed Special
Designs to Integrate BiggerEngines and Minimize Impact
on Aircraft Performance
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Propulsive Efficiency Trend with Fan Pressure Ratio
Courtesy Pratt & Whitney
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Geared Turbofan Technology Enables Paradigm Shifts
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NASA/P&W Partnership on Geared Turbofan Technology
Low-Speed
Low-PressureHigh-Bypass-Ratio
Fan
Fan Drive Gear SystemGear Ratio ~ 3
Low-Emissions Combustor
High-Speed,
Compact,
Low Spool
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Ultra High Bypass Technology Development Roadmap
GTF Gen 1 GroundTest Demo
GTF Gen 2 Aero/AcousticWind Tunnel Test
2008 2009 2011 2012 2013 2014 2015
GTF Gen 1 EntryInto Service FAA/NASA/P&W
CLEEN Engine Demo
GTF Gen 1 Flight Test DemoUHB Nacelle/Wing
Installation Test
UHB Shaped MemoryAlloy Variable AreaNozzle Development
UHB TechnologyEngine Demo
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Summary
Ultra High Bypass Technology has the potential for significant
reductions in fuel burn, noise and emissions
Geared Turbofan Technology can enable these benefits while
allowing a reasonable engine and core size
The first generation Geared Turbofan was successfullydemonstrated by NASA and P&W partnership, and P&W will
enter it into service with aircraft manufacturers in 2013
A second generation technology to further improve performance
is being investigated collaboratively by NASA/P&W, with aplanned FAA/NASA/P&W engine demonstration in 2014
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