### 波浪情况下民机水上迫降性能数值分析

1. 1.中国航空研究院，北京　100012 2．南京航空航天大学 航空学院，南京 　210016
3.中国特种飞行器研究所，荆门 　448001
• 收稿日期:2023-02-24 修回日期:2023-04-10 接受日期:2023-08-17 出版日期:2023-09-04 发布日期:2023-09-04
• 通讯作者: 童明波 E-mail:tongw@nuaa.edu.cn
• 基金资助:
国家自然科学基金(11672133);江苏高校优势学科建设工程资助项目

### Numerical analysis of civil aircraft ditching performance in wave condition

Meng LI1, Xingyi CHEN1, Jichang CHEN2, Bin WU2, Mingbo TONG2()

1. 1.Chinese Aeronautical Establishment，Beijing 　100012，China
2.College of Aerospace Engineering，Nanjing University of Aeronautics and Astronautics，Nanjing 　210016，China
3.China Special Vehicle Research Institute，Jingmen 　448001，China
• Received:2023-02-24 Revised:2023-04-10 Accepted:2023-08-17 Online:2023-09-04 Published:2023-09-04
• Contact: Mingbo TONG E-mail:tongw@nuaa.edu.cn
• Supported by:
National Natural Science Foundation of China(11672133);A Project Founded by the Priority Academic Program Development of Jiangsu Higher Education institutions

Abstract:

To study the ditching performance of civil aircraft in wave conditions， the finite volume method of computational fluid dynamics is used to solve the unsteady incompressible RANS equation. Based on the relevant requirements and suggestions of airworthiness regulations， VOF method， whole dynamic grid method， stokes fifth-order wave model and adaptive grid technology are used to construct the numerical simulation model. The research object is airbus A320-200. Firstly， the ditching process of aircraft in the calm water and wave condition is compared and analyzed. The results show that the maximum horizontal overload is 2.42 g in the wave condition， which is 1.09 times of that in the calm condition. The maximum vertical overload is 4.82 g， which is 2.82 times of that in the calm water condition. In both cases， cushion effect and diving phenomenon are obvious. In the initial stage of impact， the aircraft is affected by water suction. In the wave condition， jumping phenomenon appears， but does not have apparent effect on the ditching process. Secondly， the influence of wave factors on water ditching performance is studied. The results show that with the increase of the wave height， the maximum horizontal and vertical overload increase. With the increase of the wave length， the maximum vertical overload decreases. With the increase of the wave height and length， the maximum sinking velocity increases.