Airfoiled blade

Details Airfoiled blade Airfoiled blade

1988-02-29

1989-05-16

Garrett, Robert E.

Fluid reaction surfaces (i.e., impellers)

Specific blade structure

Radial flow devices

416242, 416DIG2, B64C 1118

Patent

active

048305740

ABSTRACT:
A blade is comprised of a plurality of a family of airfoil sections, each section being characterized by a large leading edge radii, a camber having an apogee at approximately 45% of the airfoil section chord length and relatively blunt trailing edge. The airfoil sections taper in thickness ratio (h/b) from about 20% near the blade root to about 2% near the blade tip. The maximum thickness for each airfoil section increases along the chord length from about 39% of the airfoil section for a 20% airfoil section to about 42% of the airfoil section chord length of a 2% airfoil section. As such, the novel blade of the invention provides superior aerodynamic performance to the NACA Series 16 airfoil in the Mach 0.50 to 0.70 range with less susceptibility to foreign object damage and handling problems.

REFERENCES:
patent: 2709052 (1955-05-01), Berg
patent: 4325675 (1982-04-01), Gallot et al.
patent: 4412664 (1983-11-01), Noonan
patent: 4416434 (1983-11-01), Thibert et al.
patent: 4459083 (1984-07-01), Bingham
patent: 4519746 (1985-05-01), Wainauski et al.
patent: 4564337 (1986-01-01), Zimmer et al.
patent: 4569633 (1986-02-01), Flemming, Jr.
patent: 4611773 (1986-09-01), Goldhammer et al.

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