Tip structure for cooled turbine rotor blade

Fluid reaction surfaces (i.e. – impellers) – With fluid passage in working member communicating with... – Discharge solely at periphery normal to rotation axis

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Details

416 96R, 416 97R, 415172A, F01D 518, F01D 520

Patent

active

044240015

ABSTRACT:
The invention comprises a cooled turbine rotor blade having an improved blade tip structure. A recessed tip is provided at the leading edge end of the blade tip on downstream turbine blades which are too narrow to support a blade tip cavity over the entire exterior surface of the blade tip without interfering with cooling airflow from apertures in the exterior surface. The recessed tip structure protects apertures therein from blockage by a blade tip smear and does not substantially reduce the performance efficiency of the blade.

REFERENCES:
patent: 3533712 (1970-10-01), Kercher
patent: 3635585 (1972-01-01), Metzler
patent: 3876330 (1975-04-01), Pearson et al.
patent: 3885886 (1975-05-01), Richter
patent: 3994622 (1976-11-01), Schultz et al.
patent: 4073599 (1978-02-01), Allen et al.
patent: 4224011 (1980-09-01), Dodd et al.
patent: 4326833 (1982-04-01), Zelahy et al.

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