摘要
舰面流场对舰载直升机的起降安全性有显著影响,针对传统CFD方法在复杂模型仿真计算的不足,提出了以格子-波尔兹曼方法应用于舰面流场研究领域的课题。从基本原理和特性上介绍了格子-波尔兹曼方法,以美国船坞运输舰LPD-17为算例进行了计算仿真,分析了舰面流场的主要特征,通过对比以前的研究得出了相关结论。数值模拟表明,舰尾附近存在复杂的涡流影响,会给飞行器的起降造成困难。同时,基于格子-波尔兹曼方法的求解程序,具有较好的并行效率和计算精度,省去了复杂网格生成中人工作业,提高前处理效率,减少了网格处理中的不确定性,提高了复杂流场的分析效率和结果的可信度。
Shipboard airflow has significant influence on helicopter that taking-off from or landing on ship. In view of the limitations of CFD method used in complexity model, the Lattice Boltzmann method is proposed in the shipboard airflow study. The basic principle and characteristics of Lattice Boltzmann method are introduced. An example of LPD-17 is analyzed. Conclusions are obtained compared with research achievement in the past. The numerical simulation shows that large-scale par- allel computing can be used to numerical simulation, the effective in dear with complexity model is higher due to the good parallel character and the precision and reliability can be improved in the sim- ulation for the simple process of grid that no need manual work.
出处
《飞机设计》
2017年第2期11-14,18,共5页
Aircraft Design
关键词
舰面流场
格子-波尔兹曼方法
仿真
shipboard airflow
Lattice-Boltzmann method
simulation
