Low reynolds number, low drag, high lift airfoil
US6382921B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 30, 2001 |
| Grant date | May 7, 2002 |
| Priority date | — |
| Expiry date | Jan 30, 2021 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S416/05
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
Airfoils 10 having high lift to drag characteristics at low Reynolds number are disclosed. The airfoils including a leading edge 12, a trailing edge 14 spaced from the leading edge, an upper surface 16 extending from the leading edge to the trailing edge, and a lower surface 18 extending from the leading edge to the trailing edge. An airfoil designed for a tip region of a blade has a thickness in a range of 3% to 13%, a Reynolds number in a range from 120,000 to 400,000, and a maximum lift coefficient in a range from 1.0 to 1.2. An airfoil designed for a midspan region of a blade has a thickness in a range of 3% to 13%, a Reynolds number in a range from 90,000 to 200,000, and a maximum lift coefficient in a range from 1.4 to 1.6. An airfoil designed for a root region of a blade has a thickness in a range of 5% to 15%, a Reynolds number in a range from 60,000 to 120,000, and a maximum lift coefficient in a range from 1.8 to 2.0.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.