仿蝠鲼水下滑翔机外形设计与水动力特性研究

Biomimetic technology is a major development direction for new underwater vehicles. Manta rays have excellent hydrodynamic shapes and gliding migratory characteristics, and the hydrodynamic mechanisms behind them are in urgent need of being explored for their high efficiency and energy saving. In order to improve the design efficiency of manta ray⁃like underwater glider shape, a digital modeling method based on a real biological model is established, which can flexibly control and generate three⁃dimensional models with different body lengths, body thicknesses, swept⁃back angles, trailing edge fullness, and cross⁃sectional shapes. Numerical computation methods are adopted to investigate the hydrodynamic performance of manta ray⁃like underwater gliders with different shape parameters. The results show that the relative body length, swept⁃back angle and trailing edge fullness of the manta ray⁃like underwater glider should be increased as much as possible, the body thickness should be reduced, and the original biological cross⁃section should be used to construct the shape of its shape in order to get the optimal gliding performance. The relevant results provide the theoretical support for the shape design of this underwater vehicle.