# [1]杨乾,杨庆华.折板型竖井湍流耗散及消能机理分析[J].东南大学学报(自然科学版),2020,50(3):471-481.[doi:10.3969/j.issn.1001-0505.2020.03.009] 　Yang Qian,Yang Qinghua.Analysis on turbulent dissipation and energy dissipation mechanism of baffle-drop shaft[J].Journal of Southeast University (Natural Science Edition),2020,50(3):471-481.[doi:10.3969/j.issn.1001-0505.2020.03.009] 点击复制 折板型竖井湍流耗散及消能机理分析() 分享到： var jiathis_config = { data_track_clickback: true };

50

2020年第3期

471-481

2020-05-20

## 文章信息/Info

Title:
Analysis on turbulent dissipation and energy dissipation mechanism of baffle-drop shaft

Author(s):
School of Civil Engineering, Southwest Jiaotong University, Chengdu 610031, China

Keywords:

TU992.1
DOI:
10.3969/j.issn.1001-0505.2020.03.009

Abstract:
To study the turbulent dissipation characteristics and the energy dissipation mechanism of baffle-drop shafts during drainage, hydraulic model tests and numerical simulations were carried out for nine different structural parameters of shafts to analyze the turbulent kinetic energy, the turbulent dissipation rate and the hydrodynamic load distribution law at different flow rates. The calculation model of the baffle energy dissipation was established, and the energy dissipation mechanism of the shaft was explored. The results show that too dense or too sparse baffle spacing is not conducive to the discharge and energy dissipation. The minimum baffle spacing is the optimal structural design when the flow regime is free-drop flow on the shaft in the design flow. The baffle angle of 10° can improve the energy dissipation effect of the drop shaft and reduce the hydrodynamic load on the baffles. The calculation model of the baffle energy dissipation can accurately predict the energy dissipation rate on the baffles in the free-drop flow. The energy dissipation method for the baffle-drop shaft includes inlet energy dissipation, baffle energy dissipation and shaft bottom energy dissipation. The proportion of each energy dissipation method is different at different flows. The baffle energy dissipation plays a major role in the small flow. The proportions of inlet and shaft bottom energy dissipation increase with the increase of the flow.

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