How to calculate tip speed ratio of a savonius rotor with only known parameter of wind speed 5m/s?

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Pete Bachant

Are you asking how to calculate the ideal tip speed ratio, or the angular velocity?

Tony Maine

You don't state what the rotational speed of the rotor is. It could be anything between some maximum where the device produces zero useful power, and stalled where it again produces zero useful power. Do you mean at the maximum power point?

Jose Ignacio Rojas Gregorio

I am sorry but more data and technical specifications are necessary for establishing the tip speed ratio (TSR)