Wind turbine blade planforms with twisted and tapered tips

Details Wind turbine blade planforms with twisted and tapered tips Wind turbine blade planforms with twisted and tapered tips

2008-05-30

2011-11-22

Edgar, Richard (Department: 3745)

Fluid reaction surfaces (i.e., impellers)

Specific blade structure

Radial flow devices

Reexamination Certificate

active

08061996

ABSTRACT:
A blade for a wind turbine includes a total backward twist of between approximately 6 degrees and approximately 15 degrees between an outer approximately 1 percent to 10 percent of a rotor radius of the blade; and an approximate planform distribution within the following rangesr/Rc/R(LE)c/R(TE).960.60 to 0.65%−1.42 to −1.34%.9680.54 to 0.59%−1.31 to −1.34%.9740.39 to 0.58%−1.36 to −1.22%.98060.13 to 0.57%−1.45 to −1.06%.9856−0.23 to 0.56%  −1.56 to −0.74%.9906−0.76 to 0.55%  −1.74 to −0.24%.9956−1.44 to 0.54%  −1.99 to 0.23%  1.00−2.17 to 0.54%  −2.27 to 0.44%  where “r/R” is an approximate normalized distance outward from a center of rotation of the blade along a span of the blade; and “c/R(LE)” and “c/R(TE)” are approximate relative positions of a leading (LE) and trailing edge (TE) of a chord “c” expressed as a percentage of a distance outward from the center of rotation at each r/R.

REFERENCES:
patent: 2006/0002794 (2006-01-01), Moroz et al.
patent: 2006/0216153 (2006-09-01), Wobben
patent: 1832744 (2007-12-01), None
patent: 2006133715 (2006-12-01), None
“Design of Tapered and Twisted Blade for the NREL Combined Experiment Rotor”, Publication No. NREL/SR-500-26173 (Apr. 1999).

Affiliated with

Also associated with

Rating

Wind turbine blade planforms with twisted and tapered tips does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Wind turbine blade planforms with twisted and tapered tips, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Wind turbine blade planforms with twisted and tapered tips will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-4305513