基于自适应网格技术的螺旋桨梢涡空泡数值模拟  

Numerical Simulation of Propeller Tip Vortex Cavitation Based on an Adaptive Mesh Refinement Method

作　　者：张雨新 刘洋浩 蒋曙晖 张磊 ZHANG Yuxin;LIU Yanghao;JIANG Shuhui;ZHANG Lei(Shanghai Merchant Ship Design and Research Institute,Shanghai 201203,China;CSSC SDARI-ECO(Shanghai)Co.,Ltd.,Shanghai 201203,China)

机构地区：[1]上海船舶研究设计院,上海201203 [2]中船斯达瑞节能科技(上海)有限公司,上海201203

出　　处：《船舶设计通讯》2024年第1期65-73,共9页Journal of Ship Design

摘　　要：基于自适应网格技术对敞水和船后螺旋桨梢涡空泡开展计算流体力学(Computational Fluid Dynamics,CFD)数值模拟研究,分析网格尺寸对梢涡空泡计算精度的影响。敞水计算结果表明:螺旋桨梢涡空泡对网格尺寸敏感;相对于传统的固定区域加密方法,采用的基于Q准则的自适应网格加密方法能够高效地加密梢涡区域,显著提高梢涡空泡计算精度,得出与试验相似的细长形梢涡空泡尾迹。螺旋桨叶下游不同位置的涡量和压力分布显示:自适应网格得到的梢涡中心涡量更强、压力更低。船后工况的模拟结果显示:自适应网格适用于船后工况,能够给出与模型试验一致的螺旋桨梢涡空泡形态。The Computational Fluid Dynamics(CFD)simulation combined with an adaptive mesh refinement(AMR)method is used to investigate the propeller tip vortex cavitation(TVC)problem for open water and hull-behind conditions.The main focus was the effect of mesh size on the simulation accuracy of TVC.Open water calculation results showed that TVC was strongly sensitive to mesh size,and the adopted Q-criterion based AMR method effectively improved TVC simulation and gave a much longer TVC trajectory compared with the results using a static mesh refinement region.Therefore,the computed TVC based on AMR method was in good agreement with model test results.The flow details,vorticity,and pressure distribution downstream from blade tips,showed that the simulation with AMR method gave a stronger vorticity and lower pressure inside the tip vortex core.The adopted AMR method was extended to a TVC simulation at hull-behind condition,and it gave a good prediction of the TVC compared with the model test result,implying its good adaptability for non-uniform inflow.

关 键 词：螺旋桨空泡 梢涡 计算流体力学(CFD) 自适应网格 

分 类 号：U664.33[交通运输工程—船舶及航道工程]