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In order to study the hydraulic characteristics of staggered stepped energy dissipaters with different slopes, the flow pattern, flow field, pressure field and energy dissipation characteristics of staggered stepped and rectangular stepped energy dissipaters with slope of 1:2.0 and 1:2.5 under different flow rates were compared and studied by using the method of numerical simulation and model test. The results show that with the increase of the slope of the staggered step dissipator, the three-dimensional vortex scale formed at the step groove increases, the water flow is violent and the water depth is large. The absolute value of the vertical pressure of the step is larger, and the range of negative pressure zone increases. The horizontal pressure distribution of the step under the two slopes is similar, and the closer the step is, the smaller the pressure is. The energy dissipation rate of stepped energy dissipaters with a slope of 1:2.0 is larger. The energy dissipation rate of energy dissipaters with the same slope has a nonlinear relationship with the flow rate. The larger the flow rate is, the slower the energy dissipation rate changes. The staggered stepped energy dissipater is more fully aerated and has higher energy dissipation rate than the rectangular stepped spillway. The conclusions can provide a theoretical basis for the structural optimization of staggered stepped energy dissipater.

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为分析不同坡比下交错式阶梯消能工的水力特性,采用数值模拟与模型试验相结合的方法,对比研究了不同流量下1∶2.0、1∶2.5两种坡比交错式阶梯和矩形台阶消能工的流态、流场、压力场及消能特性等。结果表明,交错式阶梯消能工坡比增加,台阶凹槽处形成的三维漩涡尺度增加,水流旋滚剧烈,水深较大;台阶竖直面压强的绝对值较大,负压区范围增加。两种坡比下台阶水平面压强分布相似,均表现为越靠近台阶外沿压强越小。坡比为1∶2.0的阶梯消能工消能率更大,同一坡比消能工的消能率与流量呈非线性关系,流量越大消能率变化越缓慢。交错式阶梯消能工较矩形台阶溢洪道掺气更加充分,消能率更高。研究结果可为交错式阶梯消能工的结构优化提供理论依据。

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陈润(1997-),女,硕士,研究方向为河流动力学,E-mail:

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陈润(1997-),女,硕士,研究方向为河流动力学,E-mail:

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陈润(1997-),女,硕士,研究方向为河流动力学,E-mail:

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溢洪道交错式阶梯消能工的消能特性研究
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陈润 1 , 李永业 1 , 张乐元 2 , 田煜 1
水电能源科学 | 水利水电工程 2023,41(1): 120-123
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水电能源科学 | 水利水电工程 2023, 41(1): 120-123
溢洪道交错式阶梯消能工的消能特性研究
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陈润1 , 李永业1, 张乐元2, 田煜1
作者信息
  • 1.太原理工大学水利科学与工程学院,山西 太原 030024
  • 2.运城市河湖务管理中心,山西 运城 044099
  • 陈润(1997-),女,硕士,研究方向为河流动力学,E-mail:

Study on Energy Dissipation Characteristics of Staggered Stepped Energy Dissipaters in Spillway
Run CHEN1 , Yong-ye LI1, Le-yuan ZHANG2, Yu TIAN1
Affiliations
  • 1.College of Hydro Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, China
  • 2.Yuncheng City River and Lake Affairs Management Center, Yuncheng 044099, China
出版时间: 2023-01-25 doi: 10.20040/j.cnki.1000-7709.2023.20220575
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为分析不同坡比下交错式阶梯消能工的水力特性,采用数值模拟与模型试验相结合的方法,对比研究了不同流量下1∶2.0、1∶2.5两种坡比交错式阶梯和矩形台阶消能工的流态、流场、压力场及消能特性等。结果表明,交错式阶梯消能工坡比增加,台阶凹槽处形成的三维漩涡尺度增加,水流旋滚剧烈,水深较大;台阶竖直面压强的绝对值较大,负压区范围增加。两种坡比下台阶水平面压强分布相似,均表现为越靠近台阶外沿压强越小。坡比为1∶2.0的阶梯消能工消能率更大,同一坡比消能工的消能率与流量呈非线性关系,流量越大消能率变化越缓慢。交错式阶梯消能工较矩形台阶溢洪道掺气更加充分,消能率更高。研究结果可为交错式阶梯消能工的结构优化提供理论依据。

阶梯消能工  /  消能率  /  消能特性  /  水力特性

In order to study the hydraulic characteristics of staggered stepped energy dissipaters with different slopes, the flow pattern, flow field, pressure field and energy dissipation characteristics of staggered stepped and rectangular stepped energy dissipaters with slope of 1:2.0 and 1:2.5 under different flow rates were compared and studied by using the method of numerical simulation and model test. The results show that with the increase of the slope of the staggered step dissipator, the three-dimensional vortex scale formed at the step groove increases, the water flow is violent and the water depth is large. The absolute value of the vertical pressure of the step is larger, and the range of negative pressure zone increases. The horizontal pressure distribution of the step under the two slopes is similar, and the closer the step is, the smaller the pressure is. The energy dissipation rate of stepped energy dissipaters with a slope of 1:2.0 is larger. The energy dissipation rate of energy dissipaters with the same slope has a nonlinear relationship with the flow rate. The larger the flow rate is, the slower the energy dissipation rate changes. The staggered stepped energy dissipater is more fully aerated and has higher energy dissipation rate than the rectangular stepped spillway. The conclusions can provide a theoretical basis for the structural optimization of staggered stepped energy dissipater.

step energy dissipator  /  energy dissipation rate  /  dissipation characteristics  /  hydraulic characteristics
陈润, 李永业, 张乐元, 田煜. 溢洪道交错式阶梯消能工的消能特性研究. 水电能源科学, 2023 , 41 (1) : 120 -123 . DOI: 10.20040/j.cnki.1000-7709.2023.20220575
Run CHEN, Yong-ye LI, Le-yuan ZHANG, Yu TIAN. Study on Energy Dissipation Characteristics of Staggered Stepped Energy Dissipaters in Spillway[J]. Water Resources and Power, 2023 , 41 (1) : 120 -123 . DOI: 10.20040/j.cnki.1000-7709.2023.20220575
  • 国家自然科学基金项目(51179116)
2023年第41卷第1期
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doi: 10.20040/j.cnki.1000-7709.2023.20220575
  • 接收时间:2022-03-25
  • 首发时间:2026-01-28
  • 出版时间:2023-01-25
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  • 收稿日期:2022-03-25
  • 修回日期:2022-04-12
基金
国家自然科学基金项目(51179116)
作者信息
    1.太原理工大学水利科学与工程学院,山西 太原 030024
    2.运城市河湖务管理中心,山西 运城 044099
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2种不同金属材料的力学参数

Family
属数
Number of
genus
种数
Number of
species
占总种数比例
Percentage of
total species (%)

Genus
种数
Number of
species
占总种数比例
Percentage of total
species (%)
鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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