مهندسی دریا
Mohammadreza Negahdari; Ruhollah Karimpuor; Iman Khatami; Babak Ahmadpoor
Abstract
Motion control may be effective by reducing the heave and pitch of a high speed vessel especially in planing hull. In order to decrease these motions, the foil was effective technique rather than other methods. High speed crafts are known to have rough water problem is essentially one of compromise between ...
Read More
Motion control may be effective by reducing the heave and pitch of a high speed vessel especially in planing hull. In order to decrease these motions, the foil was effective technique rather than other methods. High speed crafts are known to have rough water problem is essentially one of compromise between speed and seakeeping performance. The objective of this research is to predict the performance of the planing craft M Hull in term of seakeeping before and after incorporating with stern foil. Prototypes of the hull have been modeled in 3D using Rhino and is running at the head sea of the regular wave and its responses are obtained by unsteady RANS simulations using StarCCM+ software. The obtained results of RAO heave and pitch motions are presented at various Speed Cofficient. Basically, there are advantages by incorporating the stern foil at aft of the vessel to achieve the planing mode which it gives significant effect to motion reduction by increase of speed in special region. For example, at speed 40 knots by adapting with Stern foil the heave & pitch RAO trim down by 19.31% and 26.44% respectively.