Propulsion Technology DirectionICAO HQ, Montréal, Canada 9 − 10 SEPTEMBER 2014 Propulsion...
Transcript of Propulsion Technology DirectionICAO HQ, Montréal, Canada 9 − 10 SEPTEMBER 2014 Propulsion...
9 − 10 SEPTEMBER 2014 ICAO HQ, Montréal, Canada
Propulsion Technology Direction
Wesley Lord Technical Fellow – System Architecture Functional Design
Pratt & Whitney © 2014 United Technologies Corporation This document has been publicly released
Fuelling Aviation with Green Technology, ICAO HQ, Montreal, Canada, 9 and 10 September 2014
Short/Medium Range
In Service
BPR 5
Fuel Burn Reference
2015-19
BPR ~12
-15%
Longer Term
BPR 15~18
-20~30%
Propulsion Trend to Big Fans/ Small Cores
Propulsion Technology Direction
© 2014 United Technologies Corporation
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Fuelling Aviation with Green Technology, ICAO HQ, Montreal, Canada, 9 and 10 September 2014
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BPR of Current Engines vs Thrust Size 2014 Production Engines / Best in Class
NASA “Generation N”
RJ/ Single Aisle
Twin Aisle
TAKEOFF THRUST SIZE (1000 LBF) © 2014 United Technologies Corporation
Fuelling Aviation with Green Technology, ICAO HQ, Montreal, Canada, 9 and 10 September 2014
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Twin Aisle
TAKEOFF THRUST SIZE (1000 LBF)
BPR vs Thrust Size Including New Engines EIS 2015-2020
New Turbofans
GTF Engines Generation N+1
© 2014 United Technologies Corporation
Fuelling Aviation with Green Technology, ICAO HQ, Montreal, Canada, 9 and 10 September 2014
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Generation N
Generation N+1 -15%
30 60 TAKEOFF THRUST SIZE (1000 LBF)
TSFC vs Thrust Size 15% Improvement for New Engines in RJ/Single Aisle Class
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© 2014 United Technologies Corporation
Fuelling Aviation with Green Technology, ICAO HQ, Montreal, Canada, 9 and 10 September 2014
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Noise -10dBcum Improvement for New Engines in RJ/Single Aisle
Max Takeoff Weight (1000lb)
Generation N
Generation N+1 -10 dBcum
RJ/ Single Aisle
Twin Aisle
© 2014 United Technologies Corporation
Fuelling Aviation with Green Technology, ICAO HQ, Montreal, Canada, 9 and 10 September 2014
Fuelling Aviation with Green Technology, ICAO HQ, Montreal, Canada, 9 and 10 September 2014
Fan Drive Gear System Compact High Efficiency
Low-PR Fan Low Tip Speed
High-Speed Low Spool Compact 3-stage LPC, LPT
New High-OPR core Low-Emissions Combustor
GTF Engine Architecture – 2015 Configuration BPR = 12
© 2014 United Technologies Corporation
Fuelling Aviation with Green Technology, ICAO HQ, Montreal, Canada, 9 and 10 September 2014
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High BPR ~ 5-10
LHV
VTSFC
ov erall
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35K/ 0.80/ ISA/ uninstalled
Ultra-High BPR
Performance Trend to Higher OPR , Lower FPR
© 2014 United Technologies Corporation
Thermal Efficiency -production of power from fuel heat release → increase Overall Pressure Ratio (OPR)
Propulsive Efficiency -conversion of power to thrust → lower Fan Pressure Ratio (FPR)
Fuelling Aviation with Green Technology, ICAO HQ, Montreal, Canada, 9 and 10 September 2014
5.7 core
“Core Size” Design Issue for High-OPR Engines
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OPR
FPR
Relative Core Size (const thrust)
1.0
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Compressor exit corrected flow “core size”
W
3.0 core
© 2014 United Technologies Corporation
Fuelling Aviation with Green Technology, ICAO HQ, Montreal, Canada, 9 and 10 September 2014
2-Spool Gas Generator All-Axial Compression System Reverse Angled Orientation
Power Turbine
Reduction Gear
Propulsor
Study GTF Engine at BPR=18
Design Issues: blade height at HPC exit fan drive shaft through small core backbone bending of case structure
Alternative Engine Architecture
Engine Architecture Design Issues for UHB propulsion
© 2014 United Technologies Corporation
Fuelling Aviation with Green Technology, ICAO HQ, Montreal, Canada, 9 and 10 September 2014
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FPR
Relative Fan Diameter (const thrust)
Current 5:1 BPR Future 18:1 BPR
Installation Challenge for Low-FPR/ High-BPR Engines
© 2014 United Technologies Corporation
Fuelling Aviation with Green Technology, ICAO HQ, Montreal, Canada, 9 and 10 September 2014
© 2014 United Technologies Corporation
Engine Takeoff Thrust Size 50K lbf GTF Engine Architecture BPR ~ 13
NASA N+2 Goals Fuel Burn -50% (Ref: 777/GE90) Noise Ch4 – 42 EPNdBcum LTO NOX CAEP/6 – 75%
EIS ~ 2025
Credit: Boeing
N+2 Boeing BWB Aft Fuselage Installation
Fuelling Aviation with Green Technology, ICAO HQ, Montreal, Canada, 9 and 10 September 2014
N+3 MIT D8 (Double-Bubble) Configuration
Ref: AIAA-2014-0906
© 2014 United Technologies Corporation
EIS ~ 2035
NASA N+3 Goals Fuel Burn -60% (Ref: 737-800/CFM56) Noise Ch4 – 52 EPNdBcum LTO NOX CAEP/6 -80%
Engine Takeoff Thrust Size 15K lbf Boundary Layer Ingesting Propulsion BPR ~ 20+
Fuelling Aviation with Green Technology, ICAO HQ, Montreal, Canada, 9 and 10 September 2014
Propulsion Technology Direction - Summary
▪ -15% fuel burn and -10 dBcum enabled by new technology engines on regional jet and single-aisle aircraft 2015-2020 ▪ Longer term goal -20 to -30% fuel burn contribution from engines (2025+) ▪ Future propulsion design challenges involve small cores and big fans -alternative architectures at engine and vehicle level may be required
© 2014 United Technologies Corporation