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Desired
Compressor Properties
·
The
compressor must be light/strong structure.
· Aerodynamic loads will fluctuate with operating conditions
and blade/vane interactions are important. Fatigue
issues must be considered.
· Temperatures increase
through the compressor, and later stages will need to stand high temperatures
under tensile loads due to the rotation. Creep may need to be considered.
Materials
Selection Issues
·
Compressor blades are in tensile loading, and for a light/strong structure,
shape independent selection is based on (E/ρ) and (σy/ρ).
· Materials may
differ in different sections of the compressor. Titanium
may be a good choice
for the lower temperature early stages, and nickel
alloys for the higher temperature later
stages.
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