Share
VIDEOS 1 TO 50
GEnx Overview | GEnx Engine Family | Commercial Jet Engines | GE Aviation
GEnx Overview | GEnx Engine Family | Commercial Jet Engines | GE Aviation
Published: 2011/10/31
Channel: GE Aviation
The GEnx Jet Engine | GE Aviation
The GEnx Jet Engine | GE Aviation
Published: 2015/10/01
Channel: GE Aviation
GEnx -2B | Boeing 747-8 Aircraft Engine | GE Aviation
GEnx -2B | Boeing 747-8 Aircraft Engine | GE Aviation
Published: 2010/04/19
Channel: GE Aviation
GEnx-1B vs. GE90-115B
GEnx-1B vs. GE90-115B
Published: 2017/01/17
Channel: Dj's Aviation
GEnx Theatre | Introduction to the GEnx Commercial Jet Engine | GE Aviation
GEnx Theatre | Introduction to the GEnx Commercial Jet Engine | GE Aviation
Published: 2012/01/30
Channel: GE Aviation
{TrueSound}™ GEnx vs. CF6 Takeoff Sound Comparison! Boeing 747 Showdown!
{TrueSound}™ GEnx vs. CF6 Takeoff Sound Comparison! Boeing 747 Showdown!
Published: 2016/04/26
Channel: Horizon Productions SFL
GE GEnx-1B 3D Printed B787 Jet Engine Model with Thrust Reverser
GE GEnx-1B 3D Printed B787 Jet Engine Model with Thrust Reverser
Published: 2015/06/07
Channel: Punk Rocker
GE90 and GEnx Composite fan blades
GE90 and GEnx Composite fan blades
Published: 2012/12/06
Channel: GE Aviation
General Electric GEnx
General Electric GEnx
Published: 2014/11/17
Channel: Audiopedia
First Boeing 787 with GE GEnx engines
First Boeing 787 with GE GEnx engines
Published: 2010/06/17
Channel: andyh246
Genx VS. Trent 1000
Genx VS. Trent 1000
Published: 2010/09/10
Channel: ivanchiang827
GEnx | Weather Proof | Aircraft Engine Testing
GEnx | Weather Proof | Aircraft Engine Testing
Published: 2010/04/19
Channel: GE Aviation
See inside the GE9X, GE
See inside the GE9X, GE's newest game-changer
Published: 2014/07/13
Channel: GE Aviation
GEnx & GE90 | Big Brother & Little Brother
GEnx & GE90 | Big Brother & Little Brother
Published: 2010/04/19
Channel: GE Aviation
BOEING 747-8 ENGINE (GEnx engine)
BOEING 747-8 ENGINE (GEnx engine)
Published: 2014/12/05
Channel: Fady Sarofiem
747-8 GEnx Power So Quite Amazing!
747-8 GEnx Power So Quite Amazing!
Published: 2012/06/12
Channel: Airlineatlas
GEnx-1B - VFSG Alignment Tool - GE Aviation Maintenance Minute
GEnx-1B - VFSG Alignment Tool - GE Aviation Maintenance Minute
Published: 2016/09/08
Channel: GE Aviation
How a jet engine works
How a jet engine works
Published: 2012/02/23
Channel: oisiaa
General Electric Turbofan GENX  con esploso
General Electric Turbofan GENX con esploso
Published: 2015/12/22
Channel: Alessandro Chessa
GEnx-2b engine on the GE test Boeing 747
GEnx-2b engine on the GE test Boeing 747
Published: 2009/12/16
Channel: wa22030
Fantastic Business Class HD Boeing 787 Dreamliner Takeoff From Frankfurt On Qatar Airways!!!
Fantastic Business Class HD Boeing 787 Dreamliner Takeoff From Frankfurt On Qatar Airways!!!
Published: 2014/05/27
Channel: Mah584jr HD Aviation
GEnx Aircraft Engine | TAPS Combuster Technology | GE Aviation
GEnx Aircraft Engine | TAPS Combuster Technology | GE Aviation
Published: 2009/07/20
Channel: GEreports
GEnx engine
GEnx engine
Published: 2013/08/09
Channel: mtrain999
General Electric GEnx
General Electric GEnx
Published: 2014/10/04
Channel: Universidad Aeronáutica UNAQ
GEnx - Delivering Performance
GEnx - Delivering Performance
Published: 2014/06/30
Channel: GE Aviation
United 787-9 GEnx BusinessFirst Takeoff NRT-LAX - Great Engine Noise, Wing Flex and Condensation!
United 787-9 GEnx BusinessFirst Takeoff NRT-LAX - Great Engine Noise, Wing Flex and Condensation!
Published: 2015/09/17
Channel: Clay Sollers
360 Degree General Electric GEnx Engine 360Fly 4K
360 Degree General Electric GEnx Engine 360Fly 4K
Published: 2016/07/12
Channel: AIRBOYD
Take a Tour of GE Aviation’s Engine Overhaul Shop in Brazil
Take a Tour of GE Aviation’s Engine Overhaul Shop in Brazil
Published: 2014/10/29
Channel: GE Aviation
Fonctionnement d
Fonctionnement d'un turboréacteur GEnx
Published: 2013/07/25
Channel: Studi-sharing
GE
GE's Big Bet on Goliath Engines
Published: 2013/11/14
Channel: GE Aviation
Testing The GE9X Jet Engine, the World’s Largest Jet Engine
Testing The GE9X Jet Engine, the World’s Largest Jet Engine
Published: 2015/06/16
Channel: GEreports
Discover the GEnx engine family from GE Aviation
Discover the GEnx engine family from GE Aviation
Published: 2012/09/25
Channel: GE Middle East, North Africa & Turkey
Testing the GEnx engine to ensure safety.
Testing the GEnx engine to ensure safety.
Published: 2011/11/04
Channel: thegeshowchannel
Boeing 747 8F   General Electric GEnx
Boeing 747 8F General Electric GEnx
Published: 2017/04/07
Channel: Sergio Mazzi
GEnx - Unstaged Fuel Manifold Removal & Installation - GE Aviation Maintenance Minute
GEnx - Unstaged Fuel Manifold Removal & Installation - GE Aviation Maintenance Minute
Published: 2016/11/29
Channel: GE Aviation
GEnx-2B Training - GE CTEC
GEnx-2B Training - GE CTEC
Published: 2017/03/28
Channel: UPS Airlines
GEnx - Boroscope Plug Installation - GE Aviation Maintenance Minute
GEnx - Boroscope Plug Installation - GE Aviation Maintenance Minute
Published: 2016/11/15
Channel: GE Aviation
GE Aviation | 747 Test Aircraft | GEnx Testing | Jet Engine
GE Aviation | 747 Test Aircraft | GEnx Testing | Jet Engine
Published: 2009/04/29
Channel: GEreports
The Ultimate 777 Engine Comparison Video!!!  Choose Your Favorite!!!
The Ultimate 777 Engine Comparison Video!!! Choose Your Favorite!!!
Published: 2014/12/05
Channel: Mah584jr HD Aviation
Firing Up the First GE9X Engine | GE Aviation
Firing Up the First GE9X Engine | GE Aviation
Published: 2016/04/11
Channel: GE Aviation
GEnx - Oil Servicing - GE Aviation Maintenance Minute
GEnx - Oil Servicing - GE Aviation Maintenance Minute
Published: 2016/04/14
Channel: GE Aviation
Inside Innovation / GE
Inside Innovation / GE's GEnx: A Leaner, Cleaner Jet Engine
Published: 2011/10/06
Channel: GEreports
TAPS Combustor Technology | GEnx Jet Engine | GE Aviation
TAPS Combustor Technology | GEnx Jet Engine | GE Aviation
Published: 2010/04/19
Channel: GE Aviation
B787 Take-off, GEnx engines in action
B787 Take-off, GEnx engines in action
Published: 2014/07/04
Channel: Colin Musschoot
GE
GE's GEnx Large-Scale Interactive Hologram Experience
Published: 2012/05/10
Channel: GEreports
GENERAL ELECTRIC BOEING 747-446 N747GF
GENERAL ELECTRIC BOEING 747-446 N747GF
Published: 2013/03/01
Channel: linjeflyg
GE Aviation and the Ceramic Matrix Composite Revolution
GE Aviation and the Ceramic Matrix Composite Revolution
Published: 2015/10/29
Channel: GE Aviation
GEnx Aircraft Engine | Test Flight | Flight Testing | GE Aviation
GEnx Aircraft Engine | Test Flight | Flight Testing | GE Aviation
Published: 2008/10/23
Channel: GEreports
GEnx™ Engine
GEnx™ Engine
Published: 2011/09/19
Channel: aptechnology4595
GEnx-1B Engine Unveiling
GEnx-1B Engine Unveiling
Published: 2009/06/17
Channel: GEreports
NEXT
GO TO RESULTS [51 .. 100]

WIKIPEDIA ARTICLE

From Wikipedia, the free encyclopedia
Jump to: navigation, search
GEnx
Salon du Bourget 20090619 254.jpg
General Electric GEnx at the Paris Air Show 2009
Type Turbofan
Manufacturer GE Aviation
First run 2006
Major applications Boeing 747-8
Boeing 787 Dreamliner
Developed from General Electric GE90

The General Electric GEnx (General Electric Next-generation) is an advanced dual rotor, axial flow, high-bypass turbofan jet engine in production by GE Aviation for the Boeing 787 and 747-8. The GEnx is intended to replace the CF6 in GE's product line.

Design and development[edit]

GEnx on 747-8I prototype

The GEnx and the Rolls-Royce Trent 1000 were selected by Boeing following a run-off between the three big engine manufacturers. The GEnx uses some technology from the GE90 turbofan, including composite fan blades, and the smaller core featured in earlier variants of the engine. The engine carries composite technology into the fan case.

Both engine types will have a standard interface with the aircraft, allowing any 787 to be fitted with either GE or RR engines at any time.[1][2] The engine market for the 787 is estimated at US$40 billion over the next 25 years. A first is the elimination of bleed air systems using high temperature/high pressure air from the propulsion engines to power aircraft systems such as the starting, air-conditioning and anti-ice systems. Both engines enable the move towards the More Electric Aircraft, that is, the concept of replacing previously hydraulic and pneumatic systems with electrical ones to reduce weight, increase efficiency, and reduce maintenance requirements.

The GEnx was expected to produce thrust from 53,000 to 75,000 lbf (240 to 330 kN) with first tests commencing in 2006 and service entry by 2008 (delayed by 787 deliveries). Boeing predicts reduced fuel consumption of up to 20% and significantly quieter engines than current turbofans. A 66,500 lbf (296 kN) thrust version (GEnx-2B67) will be used on the 747-8. Unlike the initial version, for the 787, this version has a traditional bleed air system to power internal pneumatic and ventilation systems. It will also have a smaller overall diameter than the initial model to accommodate installation on the 747.

General Electric began initial test runs of the bleedless GEnx variant on 19 March 2006.[3] The first flight with one of these engines took place on 22 February 2007, using a Boeing 747-100, fitted with one GEnx engine in the number 2 (inboard left hand side) position.

Technical problems[edit]

In the summer of 2012, three engines suffered Low Pressure Turbine (LPT) failures; one was caused by an assembly problem, which led to inspections of all other engines then in service.[4] During the spring and summer of 2013, GE learned of four 747-8F freighters that suffered icing in their engines at altitudes of 40,000 feet and above. The most serious incident involved an AirBridge Cargo freighter. On July 31, while at an altitude of 41,000 feet over China, the flight crew noted two engines surging while a third lost substantial power. The pilots were able to land the plane safely, but the engines were found to have sustained damage. Among the possible factors GE cited in an interview with the Wall Street Journal was "'unique convective weather systems' such as unusually large thunderstorms reaching high altitudes."[5] Boeing told the newspaper that it is working with GE on software solutions to the problem.[5]

In March 2016, the Federal Aviation Administration of the United States ordered emergency fixes on the GEnX-1B PIP2 turbofan engine system, due to issues met on in-service aircraft flying in icing conditions.[6] The airworthiness directive affects 43 Boeing 787 Dreamliners in the US, and other nations are expected to follow suit. The fix involves using fan-grinding machinery.[7]

Technology[edit]

Fan blades and inlet guide vanes of GEnx-2B
Detail of GEnx core

Despite being derived from the GE90, the GEnx features a number of weight-saving features:

  • Fan diameter of 111 in (2.8 m) for the 787-8 and 105 in (2.7 m) for the 747-8.
  • Composite fan blades with steel alloy leading edges.
  • Fan case of composite material which reduces weight and thermal expansion.
  • Titanium aluminide stage 6 and 7 low-pressure turbine blades.

Fuel burn reduction technologies include:

  • Fan bypass ratio of 9.6:1, which also helps reduce noise.
  • High-pressure compressor based on GE90-94B, with 23:1 pressure ratio and only 10 stages. Also, shrouded guide vanes reduce secondary flows.
  • Counter-rotating spools for the reaction turbines to reduce load on guide vanes.
  • Lean TAPS (twin annular premixed swirler) combustor to reduce environmentally-harmful emissions with improved airflow to prevent back flash.[clarification needed][8]

Among features to reduce maintenance cost and increase engine life are:

  • Spools with lower parts count achieved by using blisks in some stages and low blade counts in other stages and by using a low number of stages.
  • Internal engine temperatures reduced by using more efficient cooling techniques.
  • Debris extraction within the low-pressure compressor guards high-pressure compressor.

All of these yield a fuel burn said to be 15% better than GE's CF6-80C2 engines for widebody aircraft.

Applications[edit]

Specifications[edit]

Data from.[9][10]

This engine is a dual rotor, axial flow, high bypass ratio turbofan. The 10-stage high-pressure compressor is driven clockwise (Aft Looking Forward) by a 2-stage high-pressure turbine. The single-stage fan and 4-stage low-pressure compressor are driven counterclockwise (Aft Looking Forward) by a 7-stage low-pressure turbine. The engine control system includes a Full Authority Digital Engine Control (FADEC), which has an aircraft connection for digital communication. An engine monitoring unit (EMU) provides vibration level signals to the aircraft.

GEnx specifications
Engine
version
Arrangement Performance Dimensions (inch)
and Weight (lb)
Certified
(FAA)
Application Entry Into Service
Fan
diameter
(in)
Fan LPC HPC LPT HPT Thrust max
(lbf)
Flat-Rated Temp C Overall
Pressure Ratio
(OPR)
Fan
Bypass Ratio
(BPR)
Air flow
(kg/s)
SFC
(max power)
T/W
ratio
Length Max Envelope Weight
(Dry)
Take-off
(5 min)
Max
Cont.
Take-off Max
Cont.
Width Height
-1B54 111 1 4 10 7 2 57,400 56,300 ISA+15 ISA+10 36.0     4.48 194.0 139.0 137.0 12,822 Mar 31, 2008 B787-3
-1B58 111 1 4 10 7 2 61,000 56,300 ISA+15 ISA+10     4.76 194.0 139.0 137.0 12,822 Mar 31, 2008 B787-3,-8
-1B64 111 1 4 10 7 2 67,500 61,500 ISA+15 ISA+10 41.0     5.23 194.0 139.0 137.0 12,822 Mar 31, 2008 B787-8,-9
-1B67 111 1 4 10 7 2 69,400 61,500 ISA+15 ISA+10 43.0     5.41 194.0 139.0 137.0 12,822 Mar 31, 2008 B787-8,-9
-1B70 111 1 4 10 7 2 72,300 66,500 ISA+15 ISA+10 43.0 9.6:1     5.64 194.0 139.0 137.0 12,822 Mar 31, 2008 B787-8,-9,-10
-2B67 105 1 3 10 6 2 67,400 58,500     43.0 8.6:1     5.44 185.0 127.0 127.0 12,400 July 22, 2010 B747-8

Notes:

  • Data for sea level static, standard pressure, no customer bleed or customer horsepower extraction, ideal inlet, 100% ram recovery, production aircraft flight cowling, production instrumentation, fuel lower heating value of 18,400 BTU/lb.
  • The 787-3 variant was cancelled in December 2010 due to low demand by customers.[11]

Specifications (GEnx-1B64)[edit]

Rear view of a GEnx-1B on a Jetstar 787-8, showing noise-reducing chevrons

Data from [12]

General characteristics

  • Type: Turbofan
  • Length: 4.69 m (184.7 in)
  • Diameter: 2.82 m (111.1 in)
  • Dry weight: 5,816 kg (12,822 lb)

Components

  • Compressor: Axial, 1 stage fan, 4 stage low pressure compressor, 10 stage high pressure compressor
  • Combustors: Annular
  • Turbine: Axial, 2 stage high pressure turbine, 7 stage low pressure turbine

Performance

See also[edit]

Related development
Comparable engines
Related lists

References[edit]

  1. ^ "Boeing 787 Aircraft Facts, Dates and History". Flightlevel350.com. Retrieved 2013-05-09. 
  2. ^ "Boeing 787 Dreamliner Long-Range, Mid-Size Airliner". Aerospace Technology. Retrieved 2013-05-09. [unreliable source?]
  3. ^ "General Electric Performs First Run of New GEnx Engine." Flight International. 21 March 2006.
  4. ^ "GE identifies installation issue in GEnx, orders inspections". Flightglobal. Retrieved 6 October 2012. 
  5. ^ a b Pasztor, Andy (October 16, 2013). "Icing Hazards Surface on Boeing's Newest 747 Jet". Wall Street Journal. p. B3. Retrieved June 10, 2014. 
  6. ^ "FAA orders engine icing fixes for GEnx-powered Boeing 787 Dreamliners". Aviation Safety Network. 2016-04-23. Retrieved 2016-04-27. 
  7. ^ Patterson, Thom (April 23, 2016). "FAA Orders Urgent Fixes For Boeing 787 Dreamliners". Retrieved April 25, 2016. 
  8. ^ GE website for TAPS combustor
  9. ^ FAA TCDS E00078NE
  10. ^ "GE plans mid-July nod for GEnx siblings." Flight International. 16 June 2010
  11. ^ "Boeing raises aircraft prices 5.2%, cancels short-haul 787". Seattle Times. 13 December 2010. 
  12. ^ Gas Turbine Engines. Aviation Week & Space Technology Source Book 2009. p 118.

External links[edit]

Disclaimer

None of the audio/visual content is hosted on this site. All media is embedded from other sites such as GoogleVideo, Wikipedia, YouTube etc. Therefore, this site has no control over the copyright issues of the streaming media.

All issues concerning copyright violations should be aimed at the sites hosting the material. This site does not host any of the streaming media and the owner has not uploaded any of the material to the video hosting servers. Anyone can find the same content on Google Video or YouTube by themselves.

The owner of this site cannot know which documentaries are in public domain, which has been uploaded to e.g. YouTube by the owner and which has been uploaded without permission. The copyright owner must contact the source if he wants his material off the Internet completely.

Powered by YouTube
Wikipedia content is licensed under the GFDL and (CC) license