Axial fan, particularly for motor vehicles

Details Axial fan, particularly for motor vehicles Axial fan, particularly for motor vehicles

1986-05-01

1987-08-04

Garrett, Robert E.

Fluid reaction surfaces (i.e., impellers)

Rotor having flow confining or deflecting web, shroud or...

Axially extending shroud ring or casing

416238, 416DIG2, 415119, F04D 2938

Patent

active

046843248

ABSTRACT:
An axial fan in which the median line (B) of each blade (3) has a first radially-innermost, rearwardly-directed curved portion (B.sub.1) and a second radially-outermost, forwardly-directed curved portion (B.sub.2), the former portion being between 25% and 50% of the full radial extent of the blade. The profile of the blade is characterized in that its circular thickness (S) increases progressively from the interior to the exterior, and the pitch setting angle (W) of the profile decreases progressively from the interior to the exterior.

REFERENCES:
patent: 1542853 (1925-06-01), Callahan
patent: 2639886 (1953-05-01), Townhill et al.
patent: 2903076 (1959-09-01), Johannesen
patent: 3998567 (1976-12-01), Fried
patent: 4358245 (1982-11-01), Gray
patent: 4563622 (1986-01-01), Deavers et al.
patent: 4569631 (1986-02-01), Gray III
Report entitled "Some Advances in Design Techniques for Low Noise Operation of Propellers and Fans", Portion of Noise Con 77 Proceedings, published by the NASA Langley Research Center of Hampton Va., Oct. 1977.

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