Underwater automatic gas capturing structure, testing device and design method

The invention discloses an underwater automatic gas capturing structure, a test device and a design method, the underwater automatic gas capturing structure comprises a water tank with an opening at the upper end, the bottom of the water tank is provided with a through hole, a semispherical super-hydrophobic closed cabin is arranged above the through hole, the bottom of the super-hydrophobic closed cabin is sealed with the edge of the through hole, and the super-hydrophobic closed cabin is provided with a plurality of air holes. A plurality of columns are uniformly arranged on the surface of the super-hydrophobic closed cabin and are perpendicular to the upper surface of the super-hydrophobic closed cabin; and a CNT adhesion layer is arranged on the surface of the cylinder. The design method comprises steps S1 to S9. According to the structure for automatically capturing the gas underwater, the structure is relatively simple, the super-hydrophobic closed cabin forms a net-shaped spherical shell, and columns a