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Troposkien vs Straight VAWT – RPM vs TSR
Hello,
I am simulating a straight-bladed VAWT at TSR = 3.3, with D = 1.03 and blade span = 1.5m. Then I create a troposkien-shaped VAWT keeping the same swept area. The overall height of VAWT decreases and diameter increases (> 1.03m) at the equator, to create the troposkien shape. But for the same TSR = 3.3, RPM of straight-bladed is 550 and of troposkien-shaped is 366. How does QBlade calculate this number 366? Does it take some equivalent diameter for troposkien which is more than that of straight (that’s why RPM is less for troposkien for same TSR and same freestream velocity)?
Regards
Shubham
