Engineering:General Electric CF34

From HandWiki
Revision as of 22:00, 3 February 2024 by Raymond Straus (talk | contribs) (change)
(diff) ← Older revision | Latest revision (diff) | Newer revision → (diff)
Short description: High bypass turbofan aircraft engine
CF34
Canadair CL-600-2B19 Regional Jet CRJ-200LR, UTair Aviation AN2213397.jpg
A CF34 installed on a Bombardier CRJ200
Type Turbofan
National origin United States
Manufacturer General Electric
First run 1982[1]
Major applications Bombardier Challenger 600 series
Bombardier Challenger 850
Bombardier CRJ
Comac ARJ21
Embraer E-Jets
Developed from General Electric TF34
CF34 engine mounted on an Embraer 190
Recent versions of the CF34 feature chevrons on the core nozzle outlet.

The General Electric CF34 is a civilian high-bypass turbofan developed by GE Aircraft Engines from its TF34 military engine. The CF34 is used on a number of business and regional jets, including the Bombardier CRJ series, the Embraer E-Jets, and Comac ARJ21.[2][3] In 2012, there were 5,600 engines in service.

Design and development

The original engine contained a single stage fan driven by a 4-stage low pressure (LP) turbine, supercharging a 14-stage HP compressor driven by a 2-stage high pressure (HP) turbine, with an annular combustor. Later higher thrust versions of the CF34 feature an advanced technology core, with only 10 HP compressor stages. Latest variants, the -10A and -10E, were derived from the CFM56 engine family,[citation needed] and have a radically different HP spool, containing a 9-stage compressor driven by a single stage turbine. The LP spool has 3 core booster stages behind the fan. Static thrust is 82 kilonewtons (18,500 lbf) for the -10E variant.

On wing times can reach 14,000 hours, an overhaul costs over $1.5 million and a set of LLPs $2.1 million for a 25,000 cycle life.[4] In 1995, GE invested $200 million to develop the -8C derivative for the CRJ700.[5]

GE had proposed updating the Boeing B-52 Stratofortress with CF34-10 engines, [6] but the Rolls-Royce F130 was selected in September 2021[7] instead.

Applications

CF34-1A
CF34-3A
CF34-3A1
CF34-3A2
CF34-3B
  • Bombardier Challenger 604
  • Bombardier Challenger 605
  • Bombardier Challenger 650
CF34-3B1
CF34-3B
CF34-8C1
  • Bombardier CRJ700 (Series 701)
CF34-8C5
  • Bombardier CRJ700 (Series 705)
  • Bombardier CRJ900
  • Bombardier CRJ900 NextGen
CF34-8C5A1
  • Bombardier CRJ1000 NextGen
CF34-8C5A2
  • Bombardier CRJ1000 NextGen
CF34-8C5B1
  • Bombardier CRJ700 NextGen
CF34-8E
  • Embraer 170
  • Embraer 175
CF34-10A
CF34-10E

Specifications

CF34 Engine Comparison[8]
CF34-3[9] CF34-8C[10] CF34-8E[11] CF34-10A[12] CF34-10E[13]
Application CL600/CRJ200 CRJ700/900/1000 E170/175 ARJ21 E190/195
Length 103 in (2.6 m) 128 in (3.3 m) 121 in (3.1 m) 90 in (2.3 m) 145 in (3.7 m)
Diameter 49 in (1.2 m) 52 in (1.3 m) 53 in (1.3 m) 57 in (1.4 m) 57 in (1.4 m)
Dry weight 1,670 lb
(760 kg)
2,400–2,450 lb
(1,090–1,110 kg)
2,600 lb
(1,200 kg)
3,700 lb
(1,700 kg)
3,700 lb
(1,700 kg)
Fan 44 in (110 cm) 46.2 in (117 cm) 53 in (130 cm)
Compressor 14 HP stages, 14:1 10 HP stages 3 LP + 9 HP stages
Turbine 4 LP + 2 HP stages 4 LP + 1 HP stage
Thrust (SL) 9,220 lbf (41.0 kN) 13,790–14,500 lbf (61.3–64.5 kN) 14,500 lbf (64 kN) 17,640 lbf (78.5 kN) 20,360 lbf (90.6 kN)
Thrust/weight 5.52:1 5.7-6:1 5.6:1 5.1:1 5.2:1
OPR (max. power) 21:1 28-28.5:1 28.5:1 29:1
Bypass ratio 6.2:1 5:1 5.4:1
SFC (Cruise) 0.69 lb/lbf/h
(20 g/kN/s)
0.67–0.68 lb/lbf/h
(19–19 g/kN/s)
0.68 lb/lbf/h
(19 g/kN/s)
0.65 lb/lbf/h
(18 g/kN/s)
0.64 lb/lbf/h
(18 g/kN/s)

See also

Related development

Comparable engines

Related lists

References

External links