Pratt & Whitney PW1000G
| PW1000G | |
|---|---|
| Type | Geared turbofan |
| Manufacturer | Pratt & Whitney |
| Major applications | Airbus A320neo Bombardier CSeries Mitsubishi Regional Jet Irkut MS-21 |
The Pratt & Whitney PW1000G is a high-bypass geared turbofan engine currently selected as the exclusive engine for the Bombardier CSeries, Mitsubishi Regional Jet (MRJ) airliners, and Irkut MS-21, and as an option on the Airbus A320neo. The project was previously known as the Geared Turbofan (GTF), and originally the Advanced Technology Fan Integrator (ATFI).
A geared turbofan uses a bigger fan but rotates slower. This moves more air at a lower speed, allowing the same thrust as a non-geared fan but with less energy expended. There is also a drag saving due to slower blades. However some energy will be lost as heat in the gear mechanism, and the bigger fan will cause some extra drag.
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[edit] Development
 External videos |
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PW1000G |
Pratt & Whitney first attempted to build a geared turbofan starting around 1998, known as the PW8000.[1] This essentially was an upgrade of the existing Pratt & Whitney PW6000 that replaced the fan section with a gearing system and new single-stage fan[2]. After several years of development the PW8000 essentially disappeared.[3] Soon after the ATFI project appeared, still using the PW6000 turbomachinery but with a new gearbox and a single-stage fan.
This led to the Geared Turbofan (GTF) programme, which was based around a newly designed core jointly developed with MTU Aero Engines of Germany. The german company provides the high-speed low-pressure turbine and various stages of the high-pressure compressor.
In addition to the geared turbofan, the current design includes a variable-area nozzle, which offers significant economic benefits.[4]
In July 2008, the GTF was renamed the PW1000G, the first in a new line of "PurePower" engines.[5] Pratt & Whitney claims the PW1000G is 10% to 15% more fuel efficient than current engines used on regional jets and single-aisle jets, as well as being substantially quieter.[6]
The engine was tested on the Pratt & Whitney 747SP,[6] and the second phase of flight testing for the PW1000G was conducted on an Airbus A340-600. The testbed aircraft, with the engine in the number two pylon position, flew for the first time in Toulouse on October 14, 2008.[7]
Testing of the PW1524G model began in October 2010.[8]
Final versions are expected to be in production in 2013.[6]
[edit] Applications
[edit] Specifications
Source: Pratt&Whitney,[9] flightglobal.com,[10][11] Airbus[12]
| Model | PW1124G/1127G/1133G | PW1215G/1217G | PW1400G | PW1521G/1524G |
|---|---|---|---|---|
| Fan diameter | 81 in (2.1 m) | 56 in (1.4 m) | 81 in (2.1 m) | 73 in (1.9 m) |
| Bypass ratio | 12:1 | 9:1 | 12:1 | 12:1 |
| Thrust | 24,000–33,000 lbf (110–150 kN)[13] | 15,000–17,000 lbf (67–76 kN) | 24,000–33,000 lbf (110–150 kN) | 21,000–23,300 lbf (93–104 kN) |
| Fuel burn (vs. current engine) | -15% | −12% | −14% | |
| Noise (vs. Stage 4) | −15 dB | −20 dB | ||
| Emissions–CO2 Reduction per aircraft per year | −2,700 t | −3,000 t | ||
| Emissions–NOx (margin to CAEP 6) | −50% | −55% | ||
| Weight (vs current engine) | ||||
| Stage count | 1-G-3-8-2-3 | 1-G-2-8-2-3 | 1-G-3-8-2-3 | 1-G-3-8-2-3 |
| Application | A320neo | MRJ | MS-21 | CSeries |
| Entry into service | 2015 | 2014 | 2016 | 2013 |
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This aircraft engine article is missing some (or all) of its specifications. If you have a source, you can help Wikipedia by adding them. |
Data from MTU[14]
General characteristics
- Type: Turbofan
- Length:
- Diameter: 1,422–2,057 millimetres (56.0–81.0 in)
- Dry weight:
Components
- Compressor: Axial flow,1-stage geared fan, 2-3 stage LP, 8 stage HP
- Combustors: Annular combustion chamber
- Turbine: Axial, 2-stage HP, 3-stage LP
Performance
- Maximum thrust: 14,000–23,000 lbf (62–100 kN)
- Power-to-weight ratio:
[edit] See also
- Related development
- Comparable engines
- Related lists
[edit] References
- ^ Pratt & Whitney's surprise leap.
- ^ Pratt & Whitney's next leap in engine technology
- ^ The Short Life and Untimely Demise of the PW8000
- ^ "P&W readies for CSeries “third knob” engine testing". http://www.flightglobal.com/articles/2011/02/23/353585/pw-readies-for-cseries-third-knob-engine-testing.html. Retrieved 2011-02-27.
- ^ "P&W launches geared turbofan plane engine". The Gazette. 2008-07-14. http://www.canada.com/montrealgazette/news/business/story.html?id=9cc6e7ad-d38b-4882-9ada-15ce26ee31b8. Retrieved 2008-07-14.
- ^ a b c Garvey, William. Pratt Gears Up for PW1000G Aviation Week. Accessed: 9 January 2011.
- ^ Airbus-owned A340 flies P&W geared turbofan engine
- ^ "Pratt & Whitney geared PW1524G testing underway". http://www.flightglobal.com/articles/2010/10/29/349133/pratt-whitney-geared-pw1524g-testing-underway.html. Retrieved 2010-10-31.
- ^ PurePower PW1000G
- ^ P&W seals deal to begin design on GTF for Russia's MS-21
- ^ Airbus set to launch A320 NEO
- ^ Airbus offers new fuel saving engine options for A320 Family
- ^ http://www.pw.utc.com/products/commercial/purepower-pw1000g.asp
- ^ http://www.mtu.de/en/products_services/new_business_commercial/programs/pw1000g/index.html
- Gunston, Bill (2006). World Encyclopedia of Aero Engines, 5th Edition. Phoenix Mill, Gloucestershire, England, UK: Sutton Publishing Limited. ISBN 0-7509-4479-X.
[edit] External links
- Pratt & Whitney PurePower(R) Engines
- Pratt & Whitney PW1000G page
- Pratt & Whitney Launches Geared Turbofan Engine with Mitsubishi Regional Jet
- Pratt & Whitney Geared Turbofan engine selected to power Mitsubishi Regional Jet
- MTU Aero Engines designs high-speed turbine for P&W's GTF geared turbofan
- First phase of GTF flight testing complete
- P&W readies for CSeries “third knob” engine testing
- Jets Gear up to Fly Greener
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