基于CFD的双艉船型阻力数值预报

摘要

A method of resistance prediction for ships with twin-skeg is outlined based on CFD theory, with different types of ship resistance obtained by solving the viscosity resistance in the viscous flow theory and the wave making resistance in the potential flow theory. Both numerical simulation and resistance prediction for a typical bulk cargo ship with twin-skeg and a liquid cargo ship with twin-skeg, advancing with differ-ent speeds in SHIPFLOW, are conducted,respectively. Comparisons between the theoretical results with experimental data are made, and it is observed that the prediction error can be controlled bellow 4%, which successfully validates the applicability and efficiency of the proposed method in engineering applications.%根据船体阻力成因和预报方法的讨论分析，提出一种应用计算流体动力学（CFD）理论进行双艉船型阻力数值预报的方法。该方法采用势流理论计算兴波阻力，基于粘性流理论计算粘性阻力。通过对某典型散货双艉船与液货双艉船在不同航速下的阻力预报及其试验数据的比对分析，结果显示，预报误差基本控制在4%以内。研究表明，该方法计算效率较高、易于实现、经济性较好，且预报精度能满足工程需要，具有较强的工程实用性。