Power and speed prediction of KVLCC2 in head waves based on TEBEM

Abstract

This paper proposes a fast and effective method to predict ship speed and power in head waves. In the resistance prediction, this paper uses Taylor Expansion Boundary Element Method (TEBEM) to carry out the numerical simulation of the added resistance and motions in the regular wave; then obtains the added resistance in irregular waves under given sea conditions according to the principle of linear superposition. TEBEM is also used to predict the hydrodynamic performance of propellers. The influence of waves on the performance of the propeller, the wake fraction and the thrust deduction fraction is ignored. An iterative method is proposed to predict speed and power in head waves. The propulsion performances in waves including propeller rotating speed, thrust, torque, propeller advance coefficient, propeller-open-water efficiency, and delivered power are investigated.