结构参数对跨介质飞行器近水面滑跳运动特性影响分析

Structure Parameter Effect on Skipping Movement Characteristics of Trans-Media Aircraft Near-Water Surface

跨介质飞行器可借助其特殊的滑板结构实现在不同介质中反复运动,为研究滑板参数对飞行器滑跳性能的影响,文中采用标准k-ε湍流模型和重叠网格技术,对具有不同滑板固定角以及滑板构型的飞行器近水面滑跳运动过程进行了数值计算研究.研究发现,当滑板固定角在10°左右时,该飞行器的近水面滑跳水动力性能最佳,稳定滑跳次数最多.而对于不同构型的滑板,矩形平滑板的砰击载荷最大,有利于飞行器的滑跳,但易对滑板造成损坏,而V型曲面滑板不仅具有优良的水动性能,同时兼具载荷适中的优点,最符合实际工程中飞行器滑板的设计要求.

Trans-medium aircraft can achieve repeated movement in different media based on its special sliding plate structure.To investigate the influence of sliding plate parameters on skipping performance,in this paper,a standard k-εturbulence model and an overlapping grid technology were used to perform numerical calculations on the skipping process of aircraft near water surface with different sliding plate inclinations and configurations.The results show that when arranging the sliding plate angle around 10°,the aircraft can get the best skipping performance and the highest stable skipping times.Analyzing the different sliding plate configurations,the results show that rectangular sliding plate can make for the aircraft to obtain the largest impact load,which is beneficial for skipping,but can easily damage sliding plate.In contrast,the V-shaped curved sliding plate not only shows excellent hydrodynamic performance but also is fit for a moderate load,being the most suitable design requirement for aircraft sliding plates in actual engineering.