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![Page 1: National Aeronautics and Space Administration NASA’s approach for quiet and efficient subsonic air transportation Prepared for Lynne Pickard,](https://reader030.fdocuments.net/reader030/viewer/2022032707/56649e165503460f94b01575/html5/thumbnails/1.jpg)
National Aeronautics and Space Administration
www.nasa.gov
NASA’s approach for quiet and efficient subsonic air transportation
Prepared for Lynne Pickard, FAAAugust, 2010
Fayette Collier, Ph.D., M.B.A.Project ManagerEnvironmentally Responsible Aviation(ERA) Project, NASA
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ERA Goals, Objectives & System Level MetricsOver the next 5 years:
• Goal – develop and mature technology/advanced aircraft designs that SIMULTANEOUSLY meet community noise, fuel burn, and NOX emission midterm goals as described in the National Aeronautics R & D Plan
– Determine potential impact of these aircraft designs and technologies if successfully implemented into the Air Transportation System
– Determine potential impact of these technologies on advanced “tube and wing” designs
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Noise(cum below Stage 4)
-60% -75% better than -75%
-33% -50%** better than -70%
-33% -50% exploit metro-plex* concepts
N+1 = 2015***Technology Benefits RelativeTo a Single Aisle Reference
Configuration
N+2 = 2020***Technology Benefits Relative
To a Large Twin Aisle Reference Configuration
N+3 = 2025***Technology Benefits
LTO NOx Emissions (below CAEP 6)
Performance:Aircraft Fuel Burn
Performance:Field Length
-32 dB -42 dB -71 dB
CORNERS OF THE TRADE SPACE
***Technology Readiness Level for key technologies = 4-6. ERA will undertake a time phased approach, TRL 6 by 2015 for “long-pole” technologies** RECENTLY UPDATED. Additional gains may be possible through operational improvements* Concepts that enable optimal use of runways at multiple airports within the metropolitan area
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Technology “Collectors”Assessing Technology Benefits
Advanced Tube and WingModerate noise and fuel burn reductions possible
Hybrid Wing BodySignificant noise and fuel burn reductions possible
• Potential ERA airframe and engine technology packages installed on both traditional and advanced configurations
• Fuel burn, noise and emissions are estimated using models developed in NASA’s standard toolset (NPSS/WATE, FLOPS, ANOPP) which has been integrated into Ga Tech’s Environmental Design Space (EDS) tool
• EDS can feed global tools in AEDT for fleet level global impact estimates
• Collaborate between FAA CLEEN and NASA FAP and ISRP
Engine Options:Advanced direct driveGeared TurbofanOpen Rotor
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Addressing Fuel Burn – 1 of 2
N+1 Timeframe (Goal = -33 percent. Reference = B737/CFM56)
Re-engine Only (-20 percent). Less Development- Geared Turbo Fan. Fuel burn and sig. noise reduction- Direct Drive. Fuel burn reduction and minor noise reduction- Open Rotor. Sig. fuel burn reduction and no noise reduction
Replacement (-33 percent). More Development- New engines as above- With new airframe
- Drag reduction through laminar boundary layer flow- Weight reduction through new low weight, damage tolerant structure
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Addressing Fuel Burn - 2 of 2N+2 Timeframe (Goal = -50 percent. Reference = B777/GE90)
Re-engine Only (-20 percent). Less Development- Geared Turbo Fan. Fuel burn and sig. noise reduction- Direct Drive. Fuel burn reduction and minor noise reduction- Open Rotor. Sig. fuel burn reduction and no noise reduction
Replacement Tube and Wing (- 40 percent). More Development- New engines as above- With new airframe
- Drag reduction through laminar boundary layer flow- Weight reduction through new low weight, damage tolerant structure
Configuration Change (- 50 percent). Much More Development- New engines as above- With new airframe
- Drag reduction through laminar boundary layer flow- Weight reduction through new low weight, damage tolerant structure- Much higher chance to significantly reduce community noise
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NRA – Vehicle Concept/Preliminary Design Study (2010 – 2012)
• NASA has released a BROAD solicitation this month to:
– Seek up to 4 subsonic transport vehicle concepts capable of simultaneous achievement of the N+2 noise, NOX and fuel burn system level metrics
– Develop 15-year technology maturation roadmaps – addressing propulsion and airframe and integration requirements
– Determine initial system readiness levels, and plot expected system readiness maturation with execution of the 15-year technology roadmaps
– Explore two additional options - • Option 1 – Select up to 2 of subsonic transport vehicle concepts to
develop preliminary designs (of sufficient scale to demonstrate goals)
• Option 2 – Identify risk reduction testing and assessment programs associated with the scaled vehicles.
– Period of performance is 27 months. Available funds = 36.6M
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7For Internal NASA Use Only 7