基于粘性CFD软件STAR-CCM+的结构化笛卡尔网格和重叠网格技术,通过改变船体表面和加密区网格大小,形成四种不同密度的网格形式,对过渡型艇在静水中从排水到过渡航行阶段(F r▽=0.664,0.860,1.934)进行数值模拟,对其阻力和纵倾角在数值模拟中对网格的不确定度进行分析,采用两种方式对结果随网格的收敛情况进行分析,并采用试验结果对其进行验证.由校核与验证的结果看,在排水航行阶段,笛卡尔网格在一定程度上能够满足模拟需求;但在过渡航行阶段,重叠网格具有十分明显的优势.
For an accurate simulation ,four different kinds of grids are formed by changing the grid of hull surface and refinement areas based on the structured cartesian grid and overset grid technique in viscous CFD software STAR-CCM+ .The numerical simulation from the navigation phases of place-ment to transition (Fr▽ =0 .664 ,0 .860 ,1 .934) in the static water is carried out and the uncertainty a-nalysis for mesh of the resistance and trim angle is conducted .Two different approaches to evaluate the convergence of the results with the mesh are used for the verification and the experiment results are adopted to verify the numerical results .From the results of verification and validation ,the carte-sian grid can meet the requirements to a certain extent in the navigation phase of placement ,while in the navigation phases of transition ,the overset grid has very obvious advantages .