Blades from Gas Turbines and Compressors
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Images From the Collection of Paolo Pisani
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Abbreviations:
HPT = High Pressure Turbine
LPC = Low Pressure Compressor
LPT = Low Pressure Turbine
NGV = Nozzle Guide Vane
Comparisons
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R-R Olympus 593
HPT and LPT Blades |
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R-R Olympus 593
Left to right: HPT Blade, LPT NGV, LPT Blade |
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HPT Blades
Left to right: R-R Olympus 593, R-R BR700 (first stage), R-R RB199 |
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Turbine Blades
Smallest to Largest: R-R RB199 HPT, R-R BR700 HPT, RR Olympus 593 HPT, R-R Olympus 593 LPT |
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Fan Blades
CF6 shrouded (top) and V2500 hollow wide-chord |
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Fan Blade Roots
V2500 (left), which lacks an annulus platform, and CF6 |
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Fan Blade Roots
Pegasus (left) and CF6
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Fan Blades
CF6 (top) and Pegasus
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Fan Blades
CF6 (upper left), V2500 (lower left), GE CF34 (center), Pegasus (two on right) |
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Rolls-Royce Olympus 593 HPT Blade (from the Concorde)
Made of NIMONIC, it is really heavy. Notice the cooling holes running
through the length of the blade.
Rolls-Royce Olympus 593 LPC 2nd Stage Blade
About 40 cm long, it has no midspan shroud -- a great achievement for such an old engine!
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Foreign Object Damage on Surface
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Foreign Object Damage on Surface
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Rolls-Royce Olympus 593 LPC 5th Stage(?) Blade
It is peculiar for its fir tree root and double locking pin.
Rolls-Royce Olympus 593 Low Pressure Turbine Nozzle Guide Vane
Notice the green color in areas where heat has most affected the material.
Rolls-Royce RB199 Turbine Blade
Although the blade is very small there are plenty of cooling holes for both film and convection cooling.
Rolls-Royce BR700 Turbine Blade
This blade is really intricate! Notice more than 130 cooling holes even in places you wouldn't imagine.
General Electric CF34 3A Fan Blade
Made of titanium, it is about 35 cm long and weighs 1.1 kg. The complex root shape is fully machined.
Tungsten carbide inserts, used to reduce wear, are visible in the last two images.
General Electric CF6-50 Fan Blade from an Airbus A300
Made of titanium, it is about 71 cm long and weighs 3.5 kg.
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Surface Foreign Object Damage and Tip Profile Changes |
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Note Refined Shape of Midspan Shroud |
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International Aero Engines V2500 Fan Blade
The wide-chord hollow titanium blade is about 60 cm long and it weighs 4.5 kg. Note the highly twisted shape.
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Red arrow indicates traces of the annulus filler; green arrows indicate vibrations dampers. |
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Arrow indicates internal hollow-to-solid transition. |
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Rolls-Royce Pegasus 1st Stage Fan Blade
About 45 cm long, it weighs 1.6 kg.
