The second step of the article is to make hydrodynamics computation on double-hydrofoil flexible tail fin and find the contribution to propulsion performance mady by arch degree of tail fin.

• 本文的主要工作是:1、对现有的水下推进方式现状、优缺点等进行了回顾和分析,结合仿生学原理,论证了采用尾鳍式推进的优越性,并介绍了当前国内外对该领域的研究概况;