防污贝壳表面纹理特征减阻效应仿真分析

Simulation Analysis on Drag Reduction Effect of Shell Surface Texture with Function of Anti-Fouling

论文聚焦于船体表面仿生减阻这一提高船舶运行效率的热点方法,以海洋中常见的能够防止海洋污损生物附着的日本镜蛤为仿生对象,探讨其表面纹理的减阻性能。通过对矩形、三角形、半圆形贝壳沟槽纹理表面的流场进行仿真模拟,分析了三种具有相同几何特征尺寸的不同沟槽纹理表面的流场特性。仿真结果表明三种沟槽表面均具有减阻效果,其中矩形沟槽表面减阻效果最佳。研究结论可为最佳减阻沟槽设计提供理论依据。

This study focused on ship hull drag reduction based on surfhce biomimetic which is a hot spot approach to improve the ship operational efficiency Dosinia japonica, a kind of common shell in ocean, can prevent the attachment of marine fouling organisms on ship hull. Therefore, dosinia japonica was adopted as the bionic object for studying the drag reduction performance. Triangle, rectangle and semicircle grooves whose sizes are similar to surface texture features of dosinia japonica were designed and their flow field characteristics were investigated using FLUENT simulation analysis. The simulation results showed that the rectangle groove had the best drag reduction effect while three kinds of grooves all had the drag reduction effects. The knowledge gained in this study will provide reduction groove. a theoretical reference for design of the optimal drag