阶梯-深潭流场结构特征研究

doi:10.3969/j.issn.1674-0696.2014.05.17

重庆交通大学学报（自然科学版） ›› 2014, Vol. 33 ›› Issue (5): 77-80.DOI: 10.3969/j.issn.1674-0696.2014.05.17

阶梯-深潭流场结构特征研究

黄华东^1,2，漆力健²，余国安³，陈社鸿²

1.重庆交通大学土木建筑学院，重庆 400074；2.四川农业大学水利与建筑工程系，四川雅安 625014；3.中国科学院地理科学与资源研究所，北京 100101

收稿日期:2013-02-22 修回日期:2013-03-20 出版日期:2014-10-15 发布日期:2015-03-10
作者简介:黄华东(1990—)，男，重庆丰都人，硕士研究生，主要从事岩土工程及工程水力学方面的研究。E-mail:huadonghuangcqjtu@foxmail.com。
基金资助:
国家自然科学基金项目（41001008）；四川省教育厅资助项目（12ZB306）

Step-Pool Flow Field Structure Characteristics

Huang Huadong^1,2, Qi Lijian², Yu Guo’an³, Chen Shehong²

1.School of Civil Engineering & Architecture, Chongqing Jiaotong University, Chongqing 400074, China; 2. Department of Water Resources & Architectural Engineering, Sichuan Agricultural University, Ya’an 625014, Sichuan, China;3. Institute of Geographical Sciences & Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China

Received:2013-02-22 Revised:2013-03-20 Online:2014-10-15 Published:2015-03-10

摘要/Abstract

摘要： 以山区河流天然的阶梯-深潭结构为研究对象，采用k-ε双方程紊流数值模拟方法，研究了不同流量下的阶梯-深潭结构深潭底部流场结构与消能相关的性质。实验表明：阶梯-深潭结构的环流区发展可增加水流在深潭区的滞留时间，促进剩余能量的耗散，对河床的安全和稳定极为有利。在深潭区，主流转换为涡漩流的过程中紊动特别强烈，能量耗散高效且均匀，阻止了因能量的积聚而造成的河床直接被冲毁情形的发生。此外，阶梯-深潭结构通过感知不同的流量情形和结构的自稳状态，优化结构使水流形成平稳的流场且压力分布趋于均匀，促进了结构的稳定和安全。

关键词: 工程地质学, 阶梯-深潭, 数值模拟, 流场结构, 能量耗散, 河床稳定

Abstract: Taking the natural step-pool system in mountainous rivers as the research subject, the numerical simulation method of k-ε turbulence was used to research the related properties between flow structure and energy dissipation of the bottom of step-pool under different flow rates. The experiment results show that the development of the step-pool recirculation zone has increased the time for water circulation in the deep pit district, promoting the dissipation of residual energy, which is extremely beneficial to the security and stability of the riverbed. In the pit area, in the process of mainstream converting into vortex, turbulence is extremely strong and energy is dispersed into the mainstream around quickly and uniformly, which prevents the riverbed from directly destroying by increase of energy. In addition, step-pool automatically adjusts the step-pool structure to adapt the different flow conditions situation and optimizes the structure, so that the flow of water becomes smoothly and the pressure distribution becomes uniformly, which improves the stability and safety of the structure.

Key words: geology engineering;step-pool, numerical simulation, structure of flow field, energy dissipation, riverbed stability

中图分类号:

TV 143

黄华东，漆力健，余国安，陈社鸿. 阶梯-深潭流场结构特征研究[J]. 重庆交通大学学报（自然科学版）, 2014, 33(5): 77-80.

Huang Huadong, Qi Lijian, Yu Guo’an, Chen Shehong. Step-Pool Flow Field Structure Characteristics[J]. Journal of Chongqing Jiaotong University(Natural Science), 2014, 33(5): 77-80.

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阶梯-深潭流场结构特征研究

Step-Pool Flow Field Structure Characteristics

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