沙漠空气预滤器导向叶片参数化造型及结构化网格划分

摘要

In order to ameliorate the intake quality of military machinery and equipment engine in the desert envi -ronment, extend the mean time between failure , and improve the service life and reliability of the whole ma-chine, it is necessary to improve the efficiency of the desert air pre-filter.According to the parametric design method, the mathematical model of desert air pre-filter guide vane's plane and cylindrical template are estab-lished.Based on the 3D coordinate value of the guide vane alignment at different radius , the 3D solid model is generated by UG .The inner flow channel of guide vanes is obtained by means of Boolean operations , while the periodically structured grid of guide vanes is completed by taking advantage of ANSYS ICEM CFD .The results show that the method can provide higher quality structured grid for numerical simulation of flow field within the air pre-filter, greatly reduce the CFD pre-processing time and meet needs of the engineering design .%为了改善沙漠环境下军用机械装备发动机的进气质量，延长其平均故障间隔时间，提高整机的使用寿命和安全可靠性，必须提高空气预滤器的效能。运用参数化设计方法，建立了沙漠空气预滤器导向叶片平面型样板和圆柱型样板的数学模型。基于不同半径下准线的三维坐标，利用UG（ Unigraphics ）软件建立了导向叶片的三维实体模型；通过布尔运算，求得了导向叶片内流道模型；利用ANSYS ICEM CFD软件，实现了其周期性结构化网格的划分。研究结果表明，该方法能够为空气预滤器内流场的数值模拟研究提供高质量的结构化网格，可大大缩短CFD （ Compu-tational Fluid Dynamics ）前处理时间，满足工程设计要求。