Airfoiled blade

Details Airfoiled blade Airfoiled blade

1988-07-26

1989-05-30

Garrett, Robert E.

Fluid reaction surfaces (i.e., impellers)

Specific blade structure

Reverse curve surface

416DIG2, B64C 1118

Patent

active

048346179

ABSTRACT:
A blade has a plurality of relatively thick, super critical airfoil sections, each section having a parabolic leading edge, with a slight camber extending to about a 40% chord, a gradual upper surface pressure recovery region from the 40% chord to the trailing edge, and a concave lower surface from the 40% chord to the trailing edge to generate required lift. The sections, which have a thickness ratio from about 2% to 7.5%, each have a maximum thickness at approximately 0.36 x/c and a maximum camber at approximately 0.74 x/c, wherein x/c is a dimensionless length along the chord of each of said airfoil sections.

REFERENCES:
patent: 3952971 (1976-04-01), Whitcomb
patent: 4325675 (1982-04-01), Gallot et al.
patent: 4412664 (1983-11-01), Noonan
patent: 4413796 (1983-11-01), Bousquet
patent: 4455003 (1984-06-01), Hilbig
patent: 4519746 (1985-05-01), Wainavski et al.
patent: 4611773 (1986-09-01), Goldhammer et al.
patent: 4652213 (1987-03-01), Thibert et al.

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