Turbine blade for use in the wet steam region of penultimate and

Details Turbine blade for use in the wet steam region of penultimate and Turbine blade for use in the wet steam region of penultimate and

1997-08-11

1999-12-21

Verdier, Christopher

Fluid reaction surfaces (i.e., impellers)

Specific blade structure

Tined or irregular periphery

416236R, 416241R, 416224, 416196R, F01D 528

Patent

active

060041021

ABSTRACT:
A turbine blade which is provided for use in a wet steam region of penultimate and ultimate stages of turbines and is subject to erosive wear caused by impinging water droplets, is treated in a region of leading edges and parts of a blade leaf in such a way as to reduce the erosive wear. In order to reduce the erosive effect of the water droplets, the blade leaf has a surface roughness in the region of its leading edge and its blade back or in at least a partial region thereof. The surface roughness is markedly increased in comparison with the surface roughness of a front side of the blade leaf.

REFERENCES:
patent: 1862827 (1932-06-01), Parsons et al.
patent: 3834833 (1974-09-01), Faber et al.
patent: 4720239 (1988-01-01), Owczarek
patent: 4869644 (1989-09-01), Takigawa
patent: 5074376 (1991-12-01), Powell
patent: 5209644 (1993-05-01), Dorman
patent: 5299915 (1994-04-01), Dinh et al.
patent: 5609470 (1997-03-01), Dodd

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