【摘要】 论文采用CFD方法结合重叠网格技术对船舶的回转性进行了仿真,采用自研CFD软件HUST-Ship求解RANS方程和物体的6自由度耦合运动。RANS方程采用有限差分法和PISO算法求解,湍流模型采用(SST)k-ω模型。还采用了基于UBET方法的改进体积力方法。对一艘43.4m长的高速巡逻艇在实尺度雷诺数下的回转运动进行了数值仿真,避免了尺度效应对计算精度的影响。将计算结果与实船试验数据进行对比,误差较小,表明了自研的CFD软件计算实尺度船舶回转运动的结果是可靠的。更多还原

【Abstract】 Turning performance is an important indicator to measure the maneuverability of ships. This paper presents a numerical simulation of the turning motion for a high-speed patrol boat at the full-scale Reynolds number. A CFD-based method coupled with an overset grid technique is applied to simulate the turning performance of the ship. All the computations are carried out by the in-house CFD code to solve RANS equations coupled with six degrees of freedom of solid body’s motion. RANS equations are solved by the finite difference method and PISO arithmetic, while the anisotropic two equations of shear stress transport(SST) k-w model and the improved body force based on the UBET method are used. A sensitivity analysis is performed on the grid to ensure the use of less mesh on the premise of meeting the accuracy. Comparing computational results with the test data of full-scale ship, it is found that the result is satisfactory, and the code is reliable.更多还原