Computational Prediction of Speed Performance for a Ship with Vortex Generators

Abstract The computational prediction method of speed performance for a ship with vortex generators is proposed. The Reynolds averaged Navier-Stokes equation has been solved together with the application of Reynolds stress turbulence mod el. The computations are carried out under identical conditions of the experimental method, i.e., towing and self-propulsion calculations without and with vortex generators. The speed performance in full scale is obtained through analyzing the computational results in model scale according to the revised model-ship performance analysis method of ITTC’78 with considering the vortex generators into account. The characteristics of resistan ce, self-propulsion and wake characteristics on the propeller plane are investigated. The proposed computational prediction clearly shows the effect of vortex generators and can be applicable to the design tool for vortex generators. ※Keywords: Vortex generator(와류생성기), Speed performance(속도성능), Computational prediction(수치적 추정), Revised ITTC’78 analysis method(수정된 ITTC’78 해석법), Resistance(저항), Self-propulsion(자항), Wake characteristics(반류특성)