摘要
不同网格类型的使用对螺旋桨不同问题数值模拟的各个方面都有重要影响。在STAR-CCM+平台上,使用RANS方法 SST kω模型对第27届ITTC指定螺旋桨进行了数值模拟,并从网格生成效率、网格计算效率、预报准确性等3个方面对3种主流的非结构网格进行比较。预报准确性的比较又从宏观(螺旋桨推力和扭矩)和微观(涡结构、尾流压力场、局部流场)2个方面进行。使用3套不同粗细的网格分析了3种网格数量变化对数值结果的影响。结果表明:四面体网格具有最高的网格生成效率和网格计算效率,但细节预报最差,网格数量变化对结果影响大;修剪网格的生成效率和计算效率处在二者之间,但对流场细节的预报最好;多面体网格的生成效率和计算效率都最低,而细节的预报处在二者之间,网格数量变化对结果影响最小。
The use of different mesh types has an important influence on all aspects of numerical simulation of propeller problems. On the STAR-CCM＋ platform, numerical simulations were carried out for the 27 th ITTC designated propeller using RANS method（SST kω model）, and a comprehensively comparison between three main unstructured mesh types was made from three aspects： mesh generation efficiency; mesh calculation efficiency; prediction accuracy. The comparison of prediction accuracy was carried out in two aspects： macroscopic quantities（thrust and torque） and microscopic quantities（vortex, wake pressure and local turbulence）. The influence of mesh number variation on numerical results is analyzed by using three sets of meshes with different resolutions. Results show that： the tetrahedral mesh has the highest mesh generation efficiency and computing efficiency, but the prediction of details is the worst and the mesh number change has the greatest impact on the numerical results; two kinds of efficiency of the trimmed mesh are second to the tetrahedral mesh, but the prediction of details is the best; the polyhedral mesh has the lowest mesh generation and calculation efficiencies, and the level of details prediction is second to the trimmed mesh, but the mesh number change has minimal impact on the numerical results.
作者
姚慧岚
张怀新
YAO Hui-lan;ZHANG Huai-xin(Shanghai Jiaotong University, State Key Laboratory of Ocean Engineering, Shanghai 200240, China;Collaborative Innovation Center for Advanced Ship and Deep-Sea Exploration （CISSE）, Shanghai 200240, China)
出处
《舰船科学技术》
北大核心
2018年第4期33-38,共6页
Ship Science and Technology
基金
国家自然科学基金资助项目(51479116
11272213)
关键词
螺旋桨
数值模拟
网格类型
效率
预报准确性
propeller
numerical simulation
mesh type
calculation efficiency
prediction accuracy
