This approach was considered through various testing and prototyping to try and increase the efficiency of the wind turbine.
NOTE****Test video at step six****
Step 1: Materials
MDF(Medium Density Fibreboard)
PVA Glue 'polyvinyl acetate'(any preferable adhesive)
PVC pipe(poly-vinyl chloride)
coupling(preferably oldham coupling or any good chosen connection)
U-pol(or some kind of filler)
multimeter and variable resistor
Step 2: Making the nozzle/diffuser
in this case a bucket was used by cutting the base out.
from testing it was found that having a lip converging to the nozzle increases the wind intake, and having one diverging from the diffuser draws the wind out by increasing the pressure.
the lip was made by vacuum forming around a wooden base( if vacuuum forming is out of the question try using a bucket that you can bend to create the shape).
the lip is then glued onto the bucket ,using upol fill and sand off to smooth the lip over the bucket
Step 3: Making the frame
in this case Mdf was used.
using PVA 'polyvinyl acetate ',glue stacks of mdf to the required depth necessary to support both the nozzle and diffuser.
saw off the ends and inside to shape creating a support in the middle of the frame(for the gear and blade aasembly)