不同风舷角下的航空母舰气流场特性研究

Research on airflow field of aircraft carrier under different wind angles

航空母舰气流场变化的研究对航空母舰的总体设计以及舰岛构型布局具有重要意义。本文基于RANS法对不同风舷角下的航母气流场进行数值模拟,同时也采用了Isherwood经验公式对其风载荷进行计算,并将数值模拟结果与经验公式对比,考察RANS法及Isherwood法对航母风载荷预报的适用性。结果表明,RANS法能够获得相对合理的数值预报结果,而Isherwood法在部分风舷角下的适应性较差。本文还分析了不同风舷角下的航母气流场特性。研究表明,航母外飘舷台和舰岛等结构的绕流场在一定风舷角下会发生强烈的相互影响。本文的结论对航母气流场的研究及总体设计有一定的参考价值。

The study of aircraft carrier airflow field is of great significance to the overall design of aircraft carrier.In this paper,the airflow field of the aircraft carrier under different wind angles is numerically simulated based on RANS method.The Isherwood empirical formula is also used to calculate the wind load.The numerical simulation results are compared with the empirical formula to investigate the applicability of RANS method and Isherwood method to the prediction of aircraft carrier wind load.The results show that the RANS method can obtain reasonable numerical prediction results,while the Isherwood method has poor adaptability under some wind side angles.This paper also analyzes the characteristics of aircraft carrier airflow field under different wind side angles.The researches show that the flow field around aircraft carrier floating platform and ship island will have a strong interaction at a certain wind side angle.The conclusion has a certain reference value for the study of aircraft carrier airflow field.