EXPERIMENTAL STUDY AND NUMERICAL CALCULATION OF HYDRODYNAMIC FORCES AND MOMENTS ACTING ON A HIGH-SPEED TRANSOMSTERN SHIP RUNNING OBLIQUE TO THE COURSE  

作　　者：Fan, Shang-yong  Lu, Shao-kang 

机构地区：[1] Acad of Naval Engineering, Wuhan, China

出　　处：《Journal of Hydrodynamics》1991年第1期1-10,共10页水动力学研究与进展B辑（英文版）

摘　　要：On the basis of oblique towing tests and flow visualizations of ship models, the flow pattern around a high-speed transom-stern ship, its motion attitudes (sinkage and trim) and the characteristics of hydrodynamic forces are analysed. It is concluded that the variation of ship motion attitudes, caused by ship speed, has a great influence over the coefficients of hydrodynamic forces and moments acting on the oblique running ship. Ship attitudes related to different speed and drift angles are calculated by Hess-Smith method. By distributing complex singularities over the surface of a double model and by considering separated vortex sheets in the wake at the lee side of the model, pressures and velocities of the fluid around the model may be calculated directly by solving a three-dimensional body with lift problem. The transom stern stream-lines are extended to form a virtual length. In this way, the hydrodynamic lateral forces, yaw moments and pressure distribution are calculated. The results show good agreement with those measured from model tests.On the basis of oblique towing tests and flow visualizations of ship models, the flow pattern around a high-speed transom-stern ship, its motion attitudes (sinkage and trim) and the characteristics of hydrodynamic forces are analysed. It is concluded that the variation of ship motion attitudes, caused by ship speed, has a great influence over the coefficients of hydrodynamic forces and moments acting on the oblique running ship. Ship attitudes related to different speed and drift angles are calculated by Hess-Smith method. By distributing complex singularities over the surface of a double model and by considering separated vortex sheets in the wake at the lee side of the model, pressures and velocities of the fluid around the model may be calculated directly by solving a three-dimensional body with lift problem. The transom stern stream-lines are extended to form a virtual length. In this way, the hydrodynamic lateral forces, yaw moments and pressure distribution are calculated. The results show good agreement with those measured from model tests.

关 键 词：Flow of Fluids Visualization Mathematical Techniques Matrix Algebra Mechanical Variables Measurement ANGLES Ship Models SHIPS Hulls 

分 类 号：TV131.2[水利工程—水力学及河流动力学]