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基于ANSYS CFX 的细沟水流切应力分析
王友1; 王健1,2; 霍春平3; 马玉红3; 牛银环3
Source Publication农业机械学报

为探明细沟断面的发育过程,利用流体力学软件ANSYS CFX 15. 0. 7 对细沟的发育变化过程进行数值仿真,
体力学角度探索了细沟在水流冲刷情况下的断面发育机理。结果表明: 利用CFX 数值仿真建模的方法,得到了染
色法测定细沟水流流速时的修正系数为0. 78。宽浅式细沟断面切应力小于窄深式断面,细沟水流切应力主要集中
在1. 41 ~ 2. 10 Pa 之间。水流切应力决定着细沟断面的发育,断面各点的切应力与断面各点发育较为吻合,切应力

Other Abstract

In order to understand the relation between the developing process of rill erosion and flow
shear stress,the paper simulated the developing process of rill erosion applying hydrodynamics software
ANSYS CFX ( version 15. 0. 7) to explore the distribution of flow velocity and shearing stress in the rill
section. Based on flume experiment,6 m long flush tank was used and rill development in 8 sections was
measured. The experimental flow rate was 800 L /h. The paper anaylized the characteristics of flow
velocity and sheer stress combined with the measured value of rill section and it is a supplement in
computing hydrodynamics of the fracture mechanism of rills under water flow. The results showed that the
rill section average flow velocity was 0. 71 times of the surface velocity,the correction coefficient was
0. 78 with the dye method to determine the rill flow velocity when using the way of CFX numerical
simulate pattern method. Rill section shape affects the magnitude of shear stress. The sheer stress value
of broad-shallow section was less than the narrow-deep section which is between 1. 41 ~ 2. 10 Pa. The
shear stress determined the rill development,and the point sheer stress distribution of rill section was
normal distribution. The point sheer stress of rill section was consistent with the rill development and
sheer stress was tightly correlated with the development of each point in the section.

Keyword细沟侵蚀 水流切应力 断面发育 Cfx
Indexed By中文核心期刊要目总览
Document Type期刊论文
Recommended Citation
GB/T 7714
王友,王健,霍春平,等. 基于ANSYS CFX 的细沟水流切应力分析[J]. 农业机械学报,2016,47(9):154-160.
APA 王友,王健,霍春平,马玉红,&牛银环.(2016).基于ANSYS CFX 的细沟水流切应力分析.农业机械学报,47(9),154-160.
MLA 王友,et al."基于ANSYS CFX 的细沟水流切应力分析".农业机械学报 47.9(2016):154-160.
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