Rotor blade of axial-flow machines

Details Rotor blade of axial-flow machines Rotor blade of axial-flow machines

1990-10-24

1992-07-21

Denion, Thomas E.

Fluid reaction surfaces (i.e., impellers)

Specific blade structure

Radial flow devices

416DIG2, 416223R, 416242, B63H 126

Patent

active

051318156

ABSTRACT:
The known rotor blade for use with axial-flow machines is improved. The improvement resides in a novel configuration of the blade body of the rotor blade. A leading edge of a tip end portion of the blade body is inclined forward (in the upstream direction of flow) and also advances in a direction of rotation, towards a tip end surface of the blade body. In the tip end portion between the tip end surface and a cross section displaced from the tip end surface towards the central portion of the blade body by 1/2 of a chord length of the tip end surface, the configuration of the leading edge of the tip end portion is such that an angle S of skew thereof over which the leading edge of the tip end portion advances in the direction of rotation and an effective skew amount .THETA..sub.s eff thereof of the angle over which the leading edge of the tip end portion is inclined forward in the upstream direction falls in a particular region in a graph of S vs. .THETA..sub.s eff delimited by 4 specific points determined through experiments.

REFERENCES:
patent: 4585395 (1986-04-01), Nourse et al.
patent: 4682935 (1987-07-01), Martin
patent: 5035578 (1991-07-01), Tran
patent: 5044885 (1991-09-01), Oddul et al.

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