仿生非光滑表面管道的设计及有限元分析

仿生非光滑表面的减阻作用由于其在工程中的应用价值而被广泛关注。为了减小油气管道运输摩擦阻力损失,将蚯蚓体表的生物学特征引入管道中,设计了凸包型、凹包型2种非光滑壁面管道。结合理论分析、仿真模拟两种手段研究了仿生管道的高性能机理。通过对比仿生管道与普通管道内流体的流动特性,得到了性能最高的非光滑结构:凸包非光滑内壁管道。该管道相对于普通光滑管道,具有更高的减阻率,运输能量更强,流速更高,可为运输管道仿生减阻的深入分析提供参考。

Design and Finite Element Analysis of Bionic Non-smooth Surface Pipes

Drag reduction effect of bionic non-smooth surfaces receives wide attention due to its use in engineering applications. We introduce the biological characteristics of earthworm body surface into pipelines, and design two non-smooth wall pipes of convex hull type and concave type. High performance mechanism of bionic pipeline is studied by theoretical design and simulation. By comparing the flow characteristics of the designed bionic pipe and ordinary pipe, we obtain the non-smooth structure with the highest performance: the convex hull non-smooth inner wall pipe. Compared with ordinary smooth pipes, the pipe has higher drag reduction rate, stronger transportation energy and higher flow rate. It can provide a reference for in-depth analysis of bionic drag reduction of transport pipelines.