The rotating cylinder rudder: The effect of cylinder roughness and cylinder gap

Article type: Research Article

Authors: Edwards, P.J. | Wakeling, B.P. | Millward, A.

Affiliations: University of Liverpool, Dept. of Mechanical Engineering, U.K.

Abstract: Tests have been made in a water tunnel to determine the effect of cylinder roughness on the performance of a model of the rotating cylinder rudder. The measurements showed that the side force developed was increased by using a rough cylinder and an additional improvement was obtained by increasing the cylinder speed ratio above the ratio found to be the optimum with a smooth cylinder. Further tests showed that increasing the gap between the cylinder and the main body of the rudder decreased the efficiency of the rudder.

DOI: 10.3233/ISP-1984-3136101

Journal: International Shipbuilding Progress, vol. 31, no. 361, pp. 226-230, 1984