Prop-fan with improved stability

Patent · Tue Mar 15 00:00:00 EST 1988

OSTI ID:5144411

Rothman, E A; Violette, J A

A prop-fan is described comprising swept, rotatable airfoil blades pivotally mounted to a hub for pitch change movement with respect thereto, and having a solidity ratio of 1.0 or greater at the roots of the blades and less than 1.0 at the tips of the blades. The prop fan is operable at or above critical Mach numbers and at transonic or supersonic tip speeds, and is characterized by: each of the blades having a leading edge. The leading edge, from a location thereon at approximately a midportion of the span and the blade, outwardly to the tip thereof, is curved in a chordal direction to define blade sweep while exhibiting no significant offset curvature in a span-wise direction.

• Assignee: United Technologies Corp., Hartford, CT
• Patent Number(s): US 4730985
• OSTI ID: 5144411
• Resource Relation: Patent File Date: Filed date 28 Jul 1986
• Country of Publication: United States
• Language: English

Related Subjects

32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
BLOWERS
DESIGN
FINS
AERODYNAMICS
AIRFOILS
CONFIGURATION
MACH NUMBER
STABILITY
FLUID MECHANICS
MECHANICS
VELOCITY
320106* - Energy Conservation
Consumption
& Utilization- Building Equipment- (1987-)