Fluid reaction surfaces (i.e. – impellers) – Specific blade structure – Irregular – flanged or channel forming blade surface
Patent
1998-01-23
2000-01-04
Verdier, Christopher
Fluid reaction surfaces (i.e., impellers)
Specific blade structure
Irregular, flanged or channel forming blade surface
416223R, 415146, 415147, 454351, 454353, F04D 2938
Patent
active
060103078
ABSTRACT:
An aerodynamic-shaped propeller blade. The blade has a cross-section which is essentially an inverted pan-shape with an intermediate section, a leading edge section, and a trailing edge section which form concave and convex surfaces. The trailing edge has a flange doubled back toward the leading edge within the concave envelope.
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Kentfield & Clavelle, "The Flow Physics of Gurney Flaps, Devices for Improving Turbine Blade Performance," (1993), pp. 24-34, 17 Wind Engineering #1, Brentwood, Essex, GB.
Gurney flap illustrations on automobile chassis, no date.
Benasutti Frank J.
Verdier Christopher
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