Journal of Zhejiang University

Journal of Zhejiang University SCIENCE A 2014 Vol.15 No.1 P.22-30

An investigation of flow characteristics in slope siphon drains*

Author(s): Yue-liang Cai¹,Hong-yue Sun²,Yue-quan Shang¹,Xiao-liang Xiong²
Affiliation(s): 1. 1. College of Civil Engineering and Architecture, Zhejiang University, Hangzhou 310058, China more
Corresponding email(s): shy@zju.edu.cn
Key Words: Siphon drainage, Wall pressing flow, Slug flow, Siphon hose diameter, Flow characteristics

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Yue-liang Cai, Hong-yue Sun, Yue-quan Shang, Xiao-liang Xiong. An investigation of flow characteristics in slope siphon drains[J]. Journal of Zhejiang University Science A, 2014, 15(1): 22-30.

@article{title="An investigation of flow characteristics in slope siphon drains",
author="Yue-liang Cai, Hong-yue Sun, Yue-quan Shang, Xiao-liang Xiong",
journal="Journal of Zhejiang University Science A",
volume="15",
number="1",
pages="22-30",
year="2014",
publisher="Zhejiang University Press & Springer",
doi="10.1631/jzus.A1300178"
}

%0 Journal Article
%T An investigation of flow characteristics in slope siphon drains
%A Yue-liang Cai
%A Hong-yue Sun
%A Yue-quan Shang
%A Xiao-liang Xiong
%J Journal of Zhejiang University SCIENCE A
%V 15
%N 1
%P 22-30
%@ 1673-565X
%D 2014
%I Zhejiang University Press & Springer
%DOI 10.1631/jzus.A1300178

TY - JOUR
T1 - An investigation of flow characteristics in slope siphon drains
A1 - Yue-liang Cai
A1 - Hong-yue Sun
A1 - Yue-quan Shang
A1 - Xiao-liang Xiong
J0 - Journal of Zhejiang University Science A
VL - 15
IS - 1
SP - 22
EP - 30
%@ 1673-565X
Y1 - 2014
PB - Zhejiang University Press & Springer
ER -
DOI - 10.1631/jzus.A1300178

Abstract
Chinese Summary
Academic Network
Reviewer Comment

Abstract: This paper presents a study of flow characteristics in high-lift siphon drains. A laboratory test was conducted to investigate the effects of hose diameter and flow velocity on siphon drainage. Three types of water flow were observed and analyzed. The experimental results show that the flow characteristics of siphon drainage are significantly influenced by the hose diameter. Water flows in the form of a wall pressing flow in a large diameter siphon hose (e.g., larger than 5.0 mm) under low flow velocity, which leads to discontinuous siphon drainage. However, water flows in the form of an integral slug flow in a small diameter siphon hose (e.g., smaller than 4.0 mm) under low flow velocity, which leads to continuous siphon drainage. Based on experimental observations, a thermodynamic derivation of the threshold of siphon hose diameter for continuous siphon drainage was analytically conducted. In slope engineering, a 3.6 mm polyurethane (PU) hose is recommended for siphon drainage.

边坡高扬程虹吸排水管流态特征研究

研究目的：从实验及理论角度阐述边坡高扬程虹吸排水容易断流造成虹吸中断的原因，并提供解决方案，实现虹吸排水的长期有效。
创新方法：利用物理模型实验，结合理论解析推导，得到了高扬程虹吸排水管顶部流态特征及其与管径的关系，解决了高扬程虹吸排水容易断流造成虹吸中断问题，保证了虹吸排水技术在边坡治理工程中的长期有效性。
研究手段：通过物理模型试验，揭示虹吸水流经过管顶区段的三种流型特征（见图4）；利用热力学理论推导，得到了虹吸水流经过管顶区段由贴壁流向弹状流转变的临界管径，见公式（23）。
重要结论：管中形成气液共同移动的完整弹状流是实现虹吸排水长期稳定的关键，虹吸水流经过管顶区段由贴壁流向弹状流转变时存在临界管径。保证边坡工程中虹吸排水长期稳定的管径以3.6?mm为宜。

关键词：虹吸排水；贴壁流；弹状流；虹吸管径；液面形状