Research On Hydrodynamic Configuration Of Hybrid Monohull With Bow-lifting-body

In recent years, with the rapid development of ship technology, people propose a higher demand for ship seakeeping. Because of its excellent performance, the high-performance ship has got the attention of national research institutions. As a kind of high-performance ship, the lifting body ship has attracted much attention because of its unique shape and excellent hydrodynamic performance. With numerical calculation and scale-model test, the paper makes a research on hydrodynamic interaction and matching of bow-lifting-body, fin/stern flap and hull. The following contents are mainly introduced:Firstly, the configuration of bow-lifting-body is designed and the numerical prediction of bow-lifting-body hydrodynamic performance is carried out. With the different aspect ratio, speed and submergence, research on lift, drag and free surface of bow-lifting-body is calculated to explore its influence rule. The calculation results show that the wave made by bow-lifting-body and the bow of ship can form favorable interference, which can reduce the ship wave resistance.Secondly, according to the hydrodynamic influence rule, research on position between bow-lifting-body and hull is carried out and the better position is obtained. With the fin installed on the bow-lifting-body, hydrodynamic interaction of bow-lifting-body, fin and hull is analysed. And the preliminary scheme of hybrid monohull is obtained. With the stern flap installed on the preliminary scheme, hydrodynamic interaction of bow-lifting-body, fin, stern flap and hull is discussed. And the optimization scheme of hybrid monohull is obtained. Then, the model test is carried out to verify the numerical method of rapidity performance.Thirdly, based on CFD numerical wave tank technology, numerical prediction of motion response in regular waves and comparative analysis of the bare hull and hybrid monohull are carried out. The calculation results show that the hybrid monohull generates a larger longitudinal moment with bow-lifting-body, fin and stern flap, which can inhibit the longitudinal movement and reduce longitudinal motion response of hybrid monohull. The stabilizing effect of hybrid monohull is also predicted. The calculation results show that the higher the speed, the more obvious the stabilization effect of hybrid monohull is. Then, the model test is carried out to verify the numerical method of seakeeping performance.