﻿ 竖缝式鱼道内部流场受加墩影响的数值模拟研究 Numerical Simulation on Flow Field of Vertical Slot Fishway with Plancon

Hans Journal of Civil Engineering
Vol.06 No.05(2017), Article ID:21945,8 pages
10.12677/HJCE.2017.65055

Numerical Simulation on Flow Field of Vertical Slot Fishway with Plancon

Mengqi Tian, Huiling Wu, Wenjie Ren, Junyu Zhou, Sifang Feng, Xi Mao*

College of Water Conservancy and Hydropower Engineering, Sichuan Agricultural University, Ya’an Sichuan

Received: Aug. 14th, 2017; accepted: Aug. 29th, 2017; published: Sep. 6th, 2017

ABSTRACT

This thesis is to make two dimensions numerical simulation on flow field of vertical slot fishway by standard k-ε turbulence model. The study is divided into three kinds of condition, that is, without plancon, with plancon, changing plancon’s position. The numerical simulation of flow field in these three cases is carried out, and the results of physical model test are compared and verified. The results indicate: adding the plancon to the mainstream path of vertical slot fishway can slow down the velocity in pool of fishway to a certain degree.

Keywords:Vertical Slot Fishway, Numerical Simulation, Flow Field

1. 引言

2. 数学模型

2.1. 控制方程

(1)

(2)

k-ε方程：

(3)

(4)

(5)

(6)

2.2. 求解方法、边界条件和划分网格

3. 数值模拟

3.1. 结构型式1的数值计算

Figure 1. Sketch of local meshes

Table 1. Numerical simulation of three different kinds of structure

Figure 2. The planar graph of fishway model

Figure 3. The pool diagram of structure 1 (unit: m)

3.2. 结构型式2的数值计算

3.3. 结构型式3的数值计算

Figure 4. The numerical simulation result of structure 1

Figure 5. The planar graph of fishway model with plancon

Figure 6. The diagram of structure 2 (unit: m)

Figure 7. The numerical simulation result of structure 2

Figure 8. The diagram of structure 3 (unit: m)

3.4. 数值计算结果分析

4. 模型试验

4.1. 模型实验结果与分析

4.2. 数值模拟计算结果与模型试验结果对比分析

Figure 9. The numerical simulation result of structure 3

(a) (b) (c)

Figure 10. Velocity diagram of structure 1, 2, 3; (a) Velocity diagram of structure 1; (b) Velocity diagram of structure 2; (c) Velocity diagram of structure 3

5. 结论

1) 竖缝式鱼道池室内的最大流速一般出现在竖缝处。

2) 加墩对竖缝式鱼道内部流场有较大的影响。

3) 加墩可以减小竖缝式鱼道竖缝处和池室内的流速值。

4) 墩的位置会影响其消能、减小流速值的能力。

Numerical Simulation on Flow Field of Vertical Slot Fishway with Plancon[J]. 土木工程, 2017, 06(05): 459-466. http://dx.doi.org/10.12677/HJCE.2017.65055

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