Hydrodynamic Characteristics Research and Structure Optimization of Hadal Lander with Hydrofoil
In order to control the falling velocity and the motion trajectory of hadal lander,the hydrofoil is designed and installed on the hadal lander,which is of high efficiency and low energy consumption.The hadal lander with hydrofoil is taken as research object,the kinematics model and hydrodynamic model are established,the evolution law of flow field around hadal lander in the falling process is numerically analyzed by the commercial software Fluent,and the slow falling mechanism based on hydrofoil is clarified.Besides,the structural parameters and the opening angle of hydrofoil are optimized based on the optimal Latin hypercube sampling method,the Gaussian process regression method,the Sobol'global sensitivity analysis method and the NSGA-Ⅲ multi-objective optimization algorithm.It shows that the opening angle of hydrofoil is the major factor affecting the falling velocity.The hydrofoil could increase the additional mass of fluid around the hadal lander and weaken the conversion of the hadal lander's gravitational potential energy towards the hadal lander's kinetic energy,which is the mechanism of hydrofoil to reduce the falling velocity of hadal lander.The structure with hydrofoil will do favor in the design and application of hadal lander.
NETL
NSTL
万方数据
维普
