旋翼桨尖涡高精度数值模拟平台开发  

Development of High-accurate Numerical Simulation Platform for Capture of Blade-tip Vortex Over Rotors

作　　者：韩少强[1] 宋文萍[1] 韩忠华[1] Han Shaoqiang;Song Wenping;Han Zhonghua(Institute of Aerodynamic and Multidisciplinary Design Optimization,National Key Laboratory of Science and Technology on Aerodynamic Design and Research,School of Aeronautics,Northwestern Polytechnical University,Xi'an 710072,China)

机构地区：[1]西北工业大学航空学院,气动与多学科优化设计研究所,翼型叶栅空气动力学国家级重点实验室,陕西西安710072

出　　处：《气动研究与试验》2024年第2期66-77,共12页Aerodynamic Research & Experiment

摘　　要：针对旋翼流场涡尾迹的高精度数值模拟需求,本文进行了结构化运动嵌套网格技术、高阶精度数值格式、大规模分块并行计算技术、非定常RANS (Reynolds-Averaged Navier-Stokes)方法研究,开发了常规单旋翼/共轴双旋翼计算网格系统生成软件、运动嵌套关系辨识软件、嵌套网格任意分块及嵌套信息匹配软件、旋翼复杂流动高精度并行数值模拟软件,建立了可用于各类旋翼在悬停和前飞状态下的非定常涡流场高精度数值模拟的高效并行化自主软件平台。运用所发展的方法和软件平台,进行了常规单旋翼和共轴双旋翼涡尾迹结构的高精度数值模拟。结果表明,该数值模拟平台具有较高的计算效率和计算精度,同时能够捕捉到精细的桨尖涡结构及其非定常生成、发展和演化过程。In order to accurately capture the wake vortex of rotors,overset grid system consists of a cartesian background grid and several body-fitted blade grids,dynamic overset grid technique with multi-start distance decreasing method and a tri-linear interpolation method,arbitrary partition of grid system for parallel computation,and unsteady RANS(Reynolds Averaged Navier Stokes)method are studied.An efficient parallel software platform for high-accurate numerical simulation of unsteady vortex flow over rotors is established,which consists of four programs for achieving generation of structured overset grid system,identification of cell-types and search of donor cells,arbitrary partition for grid system and overset information matching and high-accurate parallel numerical simulation of complex flow over rotors.Using the developed method and software platform,high-accurate numerical simulation of vortex wake structure over conventional single rotor and coaxial rotor was carried out,and sophisticated tip vortex structure and its unsteady generation,development and evolution process were captured.

关 键 词：旋翼 桨尖涡 非定常流动 高阶格式 并行计算 RANS方法 

分 类 号：V211.3[航空宇航科学与技术—航空宇航推进理论与工程]