CALCULATION OF SCALE EFFECT ON TORQUE AND THRUST OF SCREW PROPELLER OF SHIPS

Abstract

The values of torque and thrust coefficients of any propeller are different from the corresponding values of its model. This difference is known as scale effect. The significant fraction of this scale effect results from the fact that the friction conditions of the model and those of the propeller are different from each other. Based on this, there is a simple method for calculation of the correction of torque and thrust coefficient of screw propeller.