scholarly journals Concrete Construction of Flood Discharge and Sand-washing Sluice Bottom Slab of Angu Hydropower Station

2019 ◽  
Vol 300 ◽  
pp. 022108
Author(s):  
Jie Chen ◽  
Xiaoyi Xu
Keyword(s):  
Hydropower Station ◽  
Concrete Construction ◽  
Flood Discharge ◽  
Bottom Slab

Experimental Research on Structure of Surface Orifice Flood Discharge and Energy Dissipation of Hydropower Station with Large Discharge

2012 ◽  
Vol 212-213 ◽  
pp. 1048-1056
Author(s):  
Jing Li ◽  
Bo Le Jiang
Keyword(s):  
Energy Dissipation ◽  
Hydropower Station ◽  
Design Flood ◽  
Structure Pattern ◽  
Flow Energy ◽  
Flood Discharge ◽  
Guide Wall ◽  
Energy Dissipation Capacity ◽  
Large Discharge ◽  
Structure Layout

Normally, it is much complicated and difficult to design flood discharge and energy dissipation with large discharge. In this paper, twelve designed schemes of a curtain hydropower station were compared and analyzed repeatedly. It provides better reference scheme for engineering design. On weir surface and middle orifice local hydraulic model with geometry scale of 1:60, the writer tested and researched on energy dissipation capacity ,velocity and flow pattern, pressure distribution and related hydraulics problems of the curtain hydropower station discharging structure layout. Basically practicable discharging structure pattern and stilling pool pattern were put forward, through comparison and optimization of more than ten schemes. The study result showed that the surface orifice adapting proper pattern of flaring gate pier was favorable to increase the energy dissipation efficiency and shorten the length of stilling pool, but had no effect on the phenomenon of water wing hitting both sides of guide wall caused by flaring gate pier, the schemes of canceling flaring gate pier of surface orifice and adapting the declined pattern stilling pool could decrease the stilling pool floor plate velocity of under flow energy dissipation efficiently ,at the same time diminish the phenomenon of water wing hitting guide wall on both sides caused by flaring gate pier and obtain certain satisfying energy dissipation effect, moreover it had much heuristic and inspirational effect on similar projects.

scholarly journals Research on Design and Operation Method of Dewater and Filled System for Cushion Pool of High Dams ——Taking the project of BHT hydropower plant in China as an example

2021 ◽  
Vol 248 ◽  
pp. 03066
Author(s):  
Fang Jie ◽  
Cao Chunjian ◽  
Li Shengbing
Keyword(s):  
Energy Dissipation ◽  
Water Level ◽  
Electric Energy ◽  
Hydropower Plant ◽  
Hydropower Station ◽  
Flood Discharge ◽  
Filling System ◽  
Filling Device ◽  
Large Water ◽  
High Dams

Dam is set in large hydropower station. Cushion pool is built behind the dam for the flood discharge and energy dissipation of the reservoir. Operation of flood discharge and energy dissipation for some time, Cushion pool is dewatering and structure safety of which is study, then cushion pool is filled. Temporary dewater and filled system is used by previous engineer, but is arranged and controlled hard. Based on need of the cushion pool dewatering and filling, for an example of Baihetan hydropower station, necessity and feasibility are study. Then a permanent dewatering and filling system is designed for cushion pool. Design principle and arrange method are described. Many technical difficulties are study and resolved such as effect of valley deformation on the control system of dewatering and filling, demand of dewatering and filling device parameter, performance quota formulate based on large water level amplitude, protective measures in the working condition of much silt on the downstream and humidity in the equipment room of the second-dam and project of dewater drainage outlet under the water. By gravity drainage and filling based on water level difference and pump drainage, much electric energy is saved and personnel operating environment and working conditions are improved.

Stability analysis of the slope around flood discharge tunnel under inner water exosmosis at Yangqu hydropower station

2013 ◽  
Vol 51 ◽  
pp. 1-11 ◽  
Author(s):  
Tao Wang ◽  
Hegao Wu ◽  
Yang Li ◽  
Huizhong Gui ◽  
Yong Zhou ◽  
...  
Keyword(s):  
Stability Analysis ◽  
Hydropower Station ◽  
Discharge Tunnel ◽  
Flood Discharge

A Hydropower Station Energy Dissipation Shape Optimization Test

2013 ◽  
Vol 477-478 ◽  
pp. 825-828
Author(s):  
Yang Chen ◽  
Bole Jiang ◽  
Hui Chen
Keyword(s):  
Energy Dissipation ◽  
Power Plant ◽  
Flow Rate ◽  
Side Wall ◽  
Hydropower Station ◽  
Body Type ◽  
Fluctuating Pressure ◽  
Exit Side ◽  
Stilling Basin ◽  
Flood Discharge

In this study, hydraulic model testing is used to optimize the flood discharge and energy dissipation body type of some power plant. Compared from the flow regime, bottom velocity, dynamical pressure and so on, it is found that the fluctuating pressure and bottom velocity at the exit side wall stilling pool bottom, are impoved by surface outlet contraction and intermediate outlet contraction, the largest bottom flow rate of surface outlet is about 13.6m/s, the maximum fluctuating pressure of stilling basin is approximately 6.7×9.81kPa. The problem of large bottom flow rate and fluctuating pressure are solved by this testing result, the result provided references for design.

Test on the Shape Schemes of Jilintai-I Hydropower Station Flood Discharge System

2012 ◽  
Vol 490-495 ◽  
pp. 2902-2905
Author(s):  
Wen Xin Zheng
Keyword(s):  
Local Structure ◽  
Hydropower Station ◽  
Shape Design ◽  
Test Results ◽  
Bottom Slope ◽  
Discharge System ◽  
Flood Discharge ◽  
Sudden Enlargement ◽  
Original Scheme ◽  
Spillway Tunnel

According to the original scheme, the surface spillway tunnel of the Jilintai-I hydropower station flood discharge system was designed to be arranged separately, but not to be combined with diversion tunnel; the radial gate of the lower level spillway tunnel was designed not to have the vertical drop and lateral sudden enlargement, and the discharge structures at oblique tunnel were designed to be cancelled. In this paper, through the test on the hydraulic model, the analysis on the test results and many advisory demonstrations, multiple modifications and optimizations are made for the shape design of the axis, bottom slope and local structure of bottom slope and local structure, and also an analysis is conducted on the test results of the main shape scheme of surface spillway tunnel, and then the related opinions and suggestions are proposed according to the existing problems. The way of the pressured vertical drop and lateral sudden enlargement was ultimately used in lower level spillway tunnel of the hydropower station flood discharge system. Also, in this paper, the author makes a hydraulic test on the main shape design of lower level spillway tunnel based on the original scheme, and then an analysis is conducted on the test results and a final scheme is proposed according to the actual problems.

scholarly journals Study on Structure Design of Generator of Flood Discharge Tunnel with Level Swirling Flow

2021 ◽  
Vol 276 ◽  
pp. 02013
Author(s):  
Heng Zhou ◽  
Hui Li ◽  
Jing Liu ◽  
Xinlei Guo ◽  
Weiguo Wang ◽  
...  
Keyword(s):  
Swirling Flow ◽  
Yellow River ◽  
Water Pressure ◽  
Northwest China ◽  
Internal Force ◽  
Structure Design ◽  
Hydropower Station ◽  
Discharge Tunnel ◽  
Flood Discharge ◽  
Spillway Tunnel

Through the design of the Generator of the spillway tunnel, the safe operation efficiency of flood discharge tunnel with the level swirling flow is further improved. This paper takes the horizontal swirl spillway tunnel of Gongboxia Hydropower Station on the Yellow River as an example. First, the project hub facilities of the Gongboxia Hydropower Station are introduced. Moreover, the design of the gradient section and the spinning chamber section in the Generator is also studied. Based on the calculation scheme of structural mechanics, the internal force of the structure under various load combinations such as external water pressure and internal water pressure is calculated. According to Design Codes For Hydraulic Concrete Structure, the structural reinforcement is computed. These provide the basis for the design of the flood discharge tunnel with level swirling flow of large hydropower engineering facilities in Northwest China.

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