مهندسی دریا
Moloud Ariyan; Ahmad Hajivand; Etemadodin Rabei Gholami
Abstract
Maneuverability is an important quality of marine vehicles. Hydrodynamic coefficients of ship and rudder should be derived to simulate maneuvering tests. These coefficients can be obtained by using captive model test and empirical formula. Accuracy of rudder hydrodynamic coefficients is important to ...
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Maneuverability is an important quality of marine vehicles. Hydrodynamic coefficients of ship and rudder should be derived to simulate maneuvering tests. These coefficients can be obtained by using captive model test and empirical formula. Accuracy of rudder hydrodynamic coefficients is important to calculate rudder force as the most influence force in ship maneuver, precisely. Empirical formula usually are correspond to single rudder ships and for twin rudder ships numerical or experimental method are used. In this paper, by using numerical method and simulation of static towing test in computational fluid hydrodynamic environment for different angles, linear and nonlinear rudder hydrodynamic coefficients are calculated. Also, fluid velocity field around rudder is obtained to investigate separation for high rudder angle. The comparison of simulated results with the available experimental shows a very good agreement among them.