| 摘要: |
| 研究发现诸多鱼类会在休息池内,特别是转弯段休息池内出现滞留或上溯困难然。本文通过建立三维RNG k-ε紊流模型,分析了竖缝位置、池室长度、休息池内加辅助隔板等对直段休息池、转弯段休息池水动力特性的影响,获得如下主要结论：(1)休息池内水流紊动能、紊动耗散率远低于普通池室,且休息池池长越长,紊动能及紊动耗散率越低,休息空间越大；(2)竖缝位置对直段休息池影响不大；对29°弯段休息池,异侧竖缝布置更有利；对于180度弯段休息池,同侧竖缝更有利；(3)180°弯段休息池,池室中央存在大范围高流速回流区,应给与充分重视。在池室内加辅助隔板能有效破除池室中央大回流区,且大幅增加低流速区面积,值得推广应用。 |
| 关键词: 鱼道休息池 三维紊流模型 紊动能 紊动耗散率 |
| DOI： |
| 分类号:TV 131 |
| 基金项目:水利部公益性行业科研专项项目“仿生态鱼道建设的核心技术研究”（201201028）；南京水利科学研究院基本科研业务费基金项目（Y117004）。 |
|
| Study on the flow characteristics of resting pools in vertical slot fishway |
|
WANG Xiaogang,LI Yun,He Feifei,XUAN Guoxiang,WANG Biao
|
|
Nanjing Hydraulic Research Institute
|
| Abstract: |
| Several studies have identified fishes have problems of delay or ascent with resting pools in fishways, especially in turning resting pool. A 3D numerical model using the RNG k–ε turbulent closure was applied to study the influences of vertical slot position, pool length, and auxiliary baffle on hydraulic characteristics of resting pools located in straight section and turning section. According to the research, the main conclusions were as follow:(1) The turbulent kinetic energy and energy dissipation rate in resting pools were far smaller than those in regular pools. The longer the length of resting pool was, the smaller the turbulent kinetic energy and energy dissipation rate were, and the bigger the resting areas were in resting pools.(2) The position of vertical slot has no influence on the flow of resting pool located in straight section. The layout of opposite side vertical slot was better than same side vertical slot for resting pool located in 29°turning section. (3) It should be paid more attention to resting pools located in 180° turning section because there was a big circulation in the center of pool. Adding an auxiliary baffle was useful to eliminate the big circulation and increase the areas of slow water flow which should be extended and applied. |
| Key words: resting pool 3D turbulence model turbulent kinetic energy energy dissipation rate |
