Boundary layer ingesting blade

US9688395B2 · kind B2 · utility

Assignee

• SIKORSKY AIRCRAFT CORPORATION · US

Inventors

• Blake Almy Moffitt · South Windsor, US
• Thomas G. Tillman · Town of West Hartford, US
• Brian E. Wake · South Glastonbury, US
• Byung-Young Min · Glastonbury, US
• Claude G. Matalanis · Monroe, US

Key dates

• Filing date: Dec 4, 2013
• Grant date: Jun 27, 2017
• Expiry date: Aug 19, 2034

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F01D5/14
• WIPO field: Transport
• WIPO sector: Mechanical engineering

Abstract

A boundary layer ingesting (BLI) blade having a span is provided and includes a root section connectable to a hub, a tip section disposable at a distance from the hub and having a pitch and a body extending in a spanwise dimension from the root section to the tip section. The root section has a local pitch from the root section to about a 70% span location, which is less than the pitch at the tip section, to thereby reduce local angles of attack in a boundary layer region defined in and around the root section.