The invention discloses a method for improving the stability of an underwater streamline cavity, which comprises the following steps of: firstly preparing a super-hydrophobic coating on the surface of a substrate, and then processing at the upper half part of the substrate around the surface of the substrate in a manner of removing a local super-hydrophobic coating to form a plurality of annular hydrophilic strips with equal intervals and equal widths so as to form a super-hydrophobic/hydrophilic surface structure; when the substrate is put into water, the substrate is put into water in a manner that the upper half part of the substrate faces upwards, a gas-liquid-solid three-phase contact line on the substrate is firmly pinned by utilizing a wetting phase step constructed by an anisotropic super-hydrophobic/hydrophilic surface structure, and meanwhile, part of bubbles which are easily sheared off by high-speed water flow are captured and locked; the stability of the streamline cavity is improved, and then underwater continuous drag reduction is achieved. According to the novel method for improving the stability of the underwater streamline cavity, the super-hydrophobic/hydrophilic structure is prepared on the surface of the base body, and the stability of the underwater streamline cavity is improved.
本发明公开了一种提高水下流线型空腔稳定性的方法,首先在基体表面制备超疏水涂层,然后在基体上半部分围绕基体表面通过去除局部超疏水涂层的方式加工形成数条等间距且等宽度的环形亲水性条带,形成超疏水/亲水表面结构;当基体下入水中时,以基体上半部分朝上的方式下入水中,利用各向异性的超疏水/亲水表面结构所构建的润湿相阶,牢固钉住基体上的气‑液‑固三相接触线,同时捕获并锁住部分易被高速水流剪切脱落的气泡,以实现提高流线型空腔稳定性,进而实现水下持续减阻。本发明提供了一种提高水下流线型空腔稳定性的新方法,通过在基体表面制备超疏水/亲水结构,提高水下流线型空腔的稳定性。
Method for improving stability of underwater streamline cavity
一种提高水下流线型空腔稳定性的方法
06.05.2025
Patent
Elektronische Ressource
Chinesisch
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