船舶摆线推进器敞水性能优化仿真研究

摘要

One of the difficulties in optimization of open water performance of cycloidal propulsion is to solve multi -degree-of-freedom motion problem of cycloidal propulsion blades and obtain the complex hydrodynamic interaction of blades accurately in the motion of multi degrees of freedom.In the paper,a cycloidal propulsion numerical solution is established.The solution consists of RANS equations,finite volume method,SST turbulence model,integrated with sliding mesh,as well as dynamic mesh technique,.Taking NACA3412 airfoil two-dimensional model as example,its accuracy and effectiveness were verified.Based on the numerical solution,the numerical simulation of open water performance of cycloidal propulsion in the viscous flow field was carried out,and the influence law of open water performance was obtained by different advance coefficient and eccentric point location.Research results show that the numerical solution can effectively solve the numerical simulation of open water performance of cycloidal propulsion blade multi-degree-of-freedom movement under the same advance coefficient.The cycloidal propulsion with large eccentricity has higher open water efficiency and can provide useful reference for cycloidal propulsion optimization design.%在摆线推进器叶片多自由度运动情况下,多叶片间复杂的水动力干扰处理是敞水性能优化的难点问题之一.采用RANS方程、有限体积法和SST湍流模型相结合,并借助滑移网格和动网格技术,建立了摆线推进器数值计算方案,以NA-CA3412翼型二维模型为算例,验证了其准确性和有效性;基于上述数值计算方案,对摆线推进器在粘性流场中的敞水性能进行了数值仿真,得到了不同进速系数和偏心点位置对敞水性能的影响规律.研究结果表明,上述数值计算方法能够有效解决摆线推进器叶片多自由度运动敞水性能数值仿真问题,在相同的进速系数下,偏心率较大的摆线推进器具有更高的敞水效率,为摆线推进器优化设计提供有益参考.