Impeller blade for axial flow fan having counter-rotating impellers
US6856941B2 · kind B2 · utility
5Cited by
52References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 21, 2003 |
| Grant date | Feb 15, 2005 |
| Priority date | — |
| Expiry date | Apr 27, 2023 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K29/00
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Method for determining the camber line and thickness distribution for blades used in a cooling fan with counter-rotating impellers. The camber lines and thickness distributions for the blades of each of the impellers are determined through use of Bezier curves and chosen to reduce boundary layer separation of airflow across the blades. The Bezier control points are altered to produce a set of distributions of the camber lines and thickness distributions, and the most favorable set is found with increased cooling efficiency.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.