The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 06, 2017
Filed:
Mar. 21, 2014
Siemens Aktiengesellschaft, München, DE;
John M. Obrecht, Louisville, CO (US);
Arni T. Steingrimsson, Erie, CO (US);
SIEMENS AKTIENGESELLSCHAFT, München, DE;
Abstract
A wind turbine blade airfoil trailing edge (TE) with a first waveform profile (B,C,E) as seen from behind, formed by ruffles or alternating ridges () and valleys () formed on the airfoil () and ending at the trailing edge. The trailing edge may further include a second waveform profile (B,C,E) as seen from above, resulting from serrations formed by an oblique termination plane (B) of the trailing edge or by other geometry. The ridges and/or serrations may be asymmetric (E,E) to increase a stall fence effect of the ridges on the suction side (SS) of the trailing edge. The first and second waveforms may have the same period (B,B) or different periods (C,C).