基于Star-CCM+二次开发的飞机外流场数值模拟

为了在飞机气动外形设计中获得较为理想的气动性能,必须经过多次的几何建模、模型优化、网格划分、CFD流场数值模拟以及数据采集与分析等过程,其过程耗时耗力且易出错。以DLR-F6翼身组合体为例,基于Star-CCM+软件对飞机外流场数值模拟流程进行二次开发,并给出了部分功能的关键代码。二次开发程序包括以下主要功能:模型导入以及几何处理、网格划分、物理模型选择、边界条件设置、监测点以及监测面设置、计算参数设置以及计算结果查看等等。研究结果表明,使用Star-CCM+二次开发的方法可使飞机外流场的数值模拟按照规范而简单的流程进行,实现一键设置,提高飞机外流场数值模拟的工作效率,保证计算精度以及迭代计算结果的一致性,避免了模拟过程中的遗漏或错误。

Numerical simulation of aircraft outflow field based on secondary development of Star-CCM+

In order to obtain an ideal aerodynamic performance in the aircraft aerodynamic shape design, it is necessary to go through multiple processes such as geometric modeling, model optimization, meshing, numerical simulation, and data acquisition and analysis, which are time-consuming, labor-intensive and error-prone. Therefore, this paper takes the DLR-F6 wing-body as an example, the numerical simulation process of aircraft outflow field was re-developed based on Star-CCM+ software, and the key codes of some functions were given. The program includes model import and geometric processing, meshing, physical model selection, boundary condition setting, monitoring point and monitoring surface setting, calculation parameter setting and calculation result viewing, etc. The results show that the method of Star-CCM+ re-development in this paper can make the numerical simulation of aircraft outflow field conduct in order and in regular, realize one-key setting, improve the efficiency of the numerical simulation of aircraft outflow field, ensure the accuracy of calculation and the consistency of the iterative calculation the results, and avoid the omission or mistakes in the simulation process.