Spiral grooves in a turbine rotor

Details Spiral grooves in a turbine rotor Spiral grooves in a turbine rotor

1988-02-08

1989-05-16

Powell, Jr., Everette A.

Fluid reaction surfaces (i.e., impellers)

With heating, cooling or thermal insulation means

416174, 416193A, 4151737, 4151744, F01D 518

Patent

active

048305758

ABSTRACT:
A spiral groove machined in the end face of a turbine rotor disc accelerates boundary layer fluid flow from the interior of the turbine rotor to the compression chamber. This flow cools the rotor disc and vanes. A transverse axial passageway may be provided beneath the vane roots. Radial extensions from this transverse passageway act to divert cool air through the rotor vanes. Abradable rings may be provided to the stator assemblies adjacent the spiral grooves which act to minimize wear between the sharp edges of the spiral grooves and the stator assemblies.

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