Abstract
Flow over a rotating cylinder is a complicated phenomenon. Many researchers studied boundary layer, for both laminar and turbulent flow and reported instabilities. Because of the difficulty in the determination of skin friction coefficient for flow over a rotating cylinder, the experimental and computational values obtained by different researchers are also widely not in agreement. The flow over a rotating cylinder has many applications such as in ship propulsion using Flettner rotor, motion of a missile, etc. Flettner rotor can be used as an auxiliary power source for ship propulsion. In this paper, using four different empirical relations for skin friction coefficient, power developed/consumed by Flettner rotor on a ship is calculated for different values of wind speed and ship speed. It is found that though, these empirical relations are differently proposed by authors, the numerical values obtained for power generated by Flettner rotor for ship propulsion using these four different formulae didn’t have significant difference.
Published Version
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