Figure 2- 3 Blades
Figure 3- 4 Blades
Figure 4- 6 Blades
Figure 5- Effectivness due to the number of blades
- Figure 1.1- Tony's Turbine Blade
- Figure 1.2- Ben's Turbine Blade
- Figure 1.3- Lauran's Turbine Blade
- Figure 1.4- Braxton's Turbine Blade
- Figure 1.5- Ali's Turbine Blade
3 Comments
sgrace posted on October 10, 2012 at 2:13 pm
We need dimensions on these blades so that we can compare the chord length and span to other blades that were tested. Someone please post these.
Also, someone in the group should surmise why in the first graph 4 of the 5 blades didn’t seem to catch the wind at all.
barksdii posted on October 10, 2012 at 4:55 pm
Warning, for all graphs, the power should be measured in mirco-watts and not mili-watts.
Ali posted on October 10, 2012 at 4:58 pm
Figure 1.1
The blade in Figure 1.1 has a length of 5 inches and a maximum width of 1.5 inches, towards the middle of the blade.
Figure 1.2
Span: 5 in.
Chord Length: 1 in.
Figure 1.3
Span: 4.88 in.
Chord Length: 1.27 in at widest point.
Figure 1.4
Span: 4.51 in.
Chord Length: 2.53 in.
Figure 1.5
Span – 5 in.
Chord Length –
Thickest: 1.22 in.
Thinnest: 0 in. (Converges at two points)
Mean: .61 in.
Specific dimensions of curvature are found on the image.
Figure 2
The power curves show effectiveness of different chord variations on a turbine with three blades. The majority of the blades barely generated power for this set up. The small surface area caused the blades to not be able to catch wind from the fan. Tony’s blade had a larger surface area and as a result it was able to generate power for a larger range of wind speeds.
Figure 3
The four blade setup generated more power than the three blade setup. Tony’s, Ben’s, and Braxon’s blades produced more power than Ali’s and Lauren’s blades.
Figure 4
All blades produced power for the 6 blade setup. The same trends exist; the blades with larger surface area generate more power. However, Tony’s blades generate more power in a three and four blade setup. Also Braxon’s and Ben’s blades generate more power in a 4 blade setup as well. The six blade setup can generate power from blades with a smaller surface.
Figure 5
These power curves illustrate the effectiveness of the blades, based off the number of blades. Data was collected from the two sets of blades that generated the most power. At lower wind speeds, for both sets of blades, a 6 blade setup generated the most amount of power. However, as wind speeds increase the 4 blade setup proved to be more efficient.