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AVIATION OPERATIONAL MEASURES FOR FUEL AND EMISSIONS REDUCTION WORKSHOP ENGINE DETERIORATION AND

AVIATION OPERATIONAL MEASURES FOR FUEL AND EMISSIONS REDUCTION WORKSHOP ENGINE DETERIORATION AND ON-WING PROCEDURES TO RECOVER PERFORMANCE Robert E. Owens Manager of Vehicle Systems Analysis Pratt & Whitney. Presentation Outline. Engine Deterioration Mechanisms Effect on Performance

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AVIATION OPERATIONAL MEASURES FOR FUEL AND EMISSIONS REDUCTION WORKSHOP ENGINE DETERIORATION AND

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  1. AVIATION OPERATIONAL MEASURES FOR FUEL AND EMISSIONS REDUCTION WORKSHOP ENGINE DETERIORATION AND ON-WING PROCEDURES TO RECOVER PERFORMANCE Robert E. Owens Manager of Vehicle Systems Analysis Pratt & Whitney Aircraft Panel Madrid 21-22 May 2002

  2. Presentation Outline • Engine Deterioration • Mechanisms • Effect on Performance • On-Wing Maintenance Actions • Process and tools • Potential gains • Projected savings Aircraft Panel Madrid 21-22 May 2002

  3. Engine Components Are Affected by Their Operating Environment Aircraft Panel Madrid 21-22 May 2002

  4. Typical Deterioration Mechanisms Dirt Accumulation Increased Tip Clearances Airfoil Erosion Seal Leakage Aircraft Panel Madrid 21-22 May 2002

  5. Typical Engine Performance Deterioration(Un-refurbished) Specific Fuel Consumption or Exhaust Gas Temperature Cycles or Hours Aircraft Panel Madrid 21-22 May 2002

  6. EGT to Achieve Thrust is Measure of Deterioration Aircraft Panel Madrid 21-22 May 2002

  7. Scheduled Refurbishing Recovers SFC and EGT Aircraft Panel Madrid 21-22 May 2002

  8. Simple Procedures to Recover Performance Between Shop Visits • On-Wing Engine Washing • addresses dirt accumulation • On-Wing Engine Bleed Rigging • addresses leakage caused by bleed system wear Aircraft Panel Madrid 21-22 May 2002

  9. On-Wing Engine WashingRegular Intervals Ensure Fuel Economy • Simple procedure • Special tooling identified • 3-4 hours, two mechanics Hand wash fan and LPC stator vanes Payoff : Up to 1.5% SFC Benefit Aircraft Panel Madrid 21-22 May 2002

  10. SFC and EGT Recouped Between Shop Visits with Repetitive Engine Wash Sample Impact of Water Wash Frequency 4.0 % Delta TSFC 1000 Cycle Wash 1000 Cycle -Wash 3.5 Deterioration Curve 3.0 Unwashed 2.5 Un-Washed Deterioration Curve 2.0 500 Cycle Wash 500 Cycle-Wash Deterioration Curve 1.5 0.75% 500 Cycle Wash Cumulative Benefit 1.0 0.5% 1000 Cycle Wash Cumulative Benefit 0.5 0.0 0 1000 2000 3000 4000 5000 6000 Cycles Aircraft Panel Madrid 21-22 May 2002

  11. On-Wing Water Wash Cost - Benefit • Costs • 6-8 man-hours per wash • waste water disposal • airplane down time • Benefits (annual per engine) • fuel savings of $20000 to $30000 • CO2 reduction of 190 to 290 tonnes • maintenance cost savings of $4000 to $6000 Note: 777 type airplane, 6.5 hr cycle, 620 cycles/yr., $1.00/gallon fuel Aircraft Panel Madrid 21-22 May 2002

  12. On-Wing Engine Bleed RiggingRepair of Leaking Bleed Valves Saves Fuel • Simple Procedure • Start, Stability, Service Bleeds • Problem Noted from in-flight performance trends • Up to 2.5% SFC Benefit Aircraft Panel Madrid 21-22 May 2002

  13. On-Wing Engine MaintenanceSimple Procedures Can Save Fuel • On-Wing water wash saves fuel and recovers EGT, extending time between shop visits • Attention to bleed system rigging prevents excessive fuel consumption Aircraft Panel Madrid 21-22 May 2002

  14. AVIATION OPERATIONAL MEASURES FOR FUEL AND EMISSIONS REDUCTION WORKSHOP Thank you ! Aircraft Panel Madrid 21-22 May 2002

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