体积力法在船舶自由直航数值计算中的影响因素研究

摘要

In order to explore the applicability of body force method and its influencing factors in numerical simulation of ship model with free direct route, the body force method is applied to establish a virtual propeller model to investigate the influence of inflow plane radius and offset on the navigational speed of a double tail fin ship.The simulation results are compared with the free-running model test results.The results show that: the inflow plane radius has a greater impact on the navigational speed, while the offset has little effect on the navigational speed;based on the body force method, the errors of the numerical result can be limited to 0.5% and the maximum deviation is less than 5%.%为了探索体积力法在船模自由直航数值计算中的适用性及影响因素,针对某双尾鳍船型,采用体积力法建立虚拟桨模型,探讨了进流盘面的半径、偏移量等对航速的影响规律,并与自航模试验结果进行对比.结果表明,进流盘半径对航速的影响较大,而偏移量对航速影响较小;采用体积力法建立虚拟桨模拟船模自由直航,航速计算精度可达0.5%,最大偏差不超过5%.