While running a CFD simulation comparison of 2 vs 3 blade propeller versions (48" diameter, 23" pitch, 3570RPM), I've come up with:
- 2-blade: 347N of static thrust @ 110Nm Torque
- 3-blade: 220N of static thrust @ 108Nm of Torque
What is the main destructive force seen in the 3-blade propeller particle flow?
Are these "not so tippy" blade tip losses, happening even 60% radius?
The number of particles shown is the same, but in the 3-blade version the same particles are being sucked-back into the flow, which explains the drop in the propeller performance.