03 Engine performance deterioration
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Transcript of 03 Engine performance deterioration
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04/02/2006RXCF
THE POWER�OF FLIGHTENGINE PERFORMANCE ENGINE PERFORMANCE
DETERIORATIONDETERIORATION
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04/02/2006RXCF
THE POWER�OF FLIGHT
? AIRCRAFTperformance deterioration
ENGINEperformance deterioration
66 %
EGT MARGIN
FUEL BURN
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04/02/2006RXCF
THE POWER�OF FLIGHT
ENGINEperformance deterioration
THERMAL Loads
PRESSURE & AERODYNAMIC Loads
CENTRIFUGAL Loads
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04/02/2006RXCF
THE POWER�OF FLIGHT
High Load Value
Cycle FrequencyTime
Load
ENGINEperformance deterioration
CYCLE FATIGUE
ROTATING PARTS
• HPT Blades and Disks
• LPT Blades and Disks
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04/02/2006RXCF
THE POWER�OF FLIGHT
ENGINEperformance deterioration
STEADY FATIGUE
FIX PARTS
• Combustion Chamber
• Nozzles, Vanes, Valves
Time
Load
Time At a Given Load
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04/02/2006RXCF
THE POWER�OF FLIGHT
ENGINEperformance deterioration
BLADES / CASING CLEARANCES
EXCESSIVE
• Possible EGT over-temperature
• Fuel over-consumption
+ 10° EGT=
+ 0.7% SFC
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04/02/2006RXCF
THE POWER�OF FLIGHT
ENGINEperformance deterioration
BLEED AIR
AIR LEAKAGES
• 1% leakage, 9Th stage HPTCC bleed+ 0.5% SFC
• 1% leakage, 9Th stage CUSTOMER bleed+ 1.6% SFC
• VBV leakage, open 10°+ 0.7% SFC
• Bleed Valves
• VBV
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04/02/2006RXCF
THE POWER�OF FLIGHTCREW POINT OF VIEW
• ENGINE START UP MONITORING
• DERATE TAKE OFF
• BLEED OFF TAKE OFF
• ROLLING TAKE OFF
• PROGRESSIVE POWER SETTING
• AVOID SLAM ACCELERATION & DECELERATION
• AWARENESS OF WARM UP & COOL DOWN PERIODS
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04/02/2006RXCF
THE POWER�OF FLIGHT
TAKE CARE OF YOUR ENGINES…
AND KEEP YOURAIRCRAFT SAFE !!!
YOU WILL SAVEMONEY …