The Study of Solution to Relieve the Backwater of Aerator Structure of Spillway Tunnel

2019 ◽  
Author(s):  
LI JING ◽  
ZENG XIANG
Keyword(s):  
Spillway Tunnel

Flow-Induced Vibration Study of Tunnel Spillway Working Gate on One Reservoir

2012 ◽  
Vol 226-228 ◽  
pp. 13-16
Author(s):  
Xin Wang ◽  
Shao Ze Luo
Keyword(s):  
Dynamic Pressure ◽  
High Energy ◽  
Vibration Response ◽  
Analysis Method ◽  
Flow Induced Vibration ◽  
3D Fem ◽  
Fem Model ◽  
Tunnel Spillway ◽  
Partial Opening ◽  
Spillway Tunnel

In order to study the flow-induced vibration of the spillway tunnel working gate of one reservoir, hydraulic model test with scale 1:20 was conducted to obtain the dynamic pressure characteristics on the working gate. Experiment modal analysis method was employed to identify the structure dynamic characteristics through the 1:10 working gate mode test. The 3D FEM model of the gate was built to simulate the vibration response of the structure. The research showed the low order modal frequencies of the working gate were not fully breaking away from the high energy zone of the dynamic water, which would induce severe vibration. The vibration response of the gate became the biggest when it was operating at 0.5 partial opening.

Schematic study on temperature control and crack prevention during spillway tunnel concreting period

2014 ◽  
Vol 48 (11) ◽  
pp. 3517-3525 ◽  
Author(s):  
Zhenhong Wang ◽  
Yi Liu ◽  
Guoxin Zhang ◽  
Wenqian Hou
Keyword(s):  
Temperature Control ◽  
Spillway Tunnel

Pressure Distribution of Pressure and Non-Pressure Sections of a Hydropower Station Spillway Tunnel

2014 ◽  
Vol 716-717 ◽  
pp. 244-247
Author(s):  
Hong Qing Zhang ◽  
Wei Kai Tan ◽  
Yi Long Lou ◽  
Qian Zhao
Keyword(s):  
Pressure Distribution ◽  
Model Experiment ◽  
Hydropower Station ◽  
Maximum Pressure ◽  
Turbulent Model ◽  
Sudden Drop ◽  
Sudden Enlargement ◽  
High Head ◽  
Spillway Tunnel ◽  
Large Discharge

In this paper, we used VOF combining turbulent model to simulate pressure distribution of pressure section and non-pressure section in a hydropower station spillway tunnel with high head and large discharge in China. The results show that in the pressure section of the spillway tunnel, the values of pressure of emergency gate slot, working gate and the pressing slope, getting from physical model experiment and numerical simulation, are all positive. While in the non-pressure section, the No.1、2、3 aerators of the sudden enlargement and sudden drop occur the maximum pressure. And at the back of the No.1、2、3 aerators, where the values of pressure are negative, forms cavity. The conclusions obtained can improve the design of spillway tunnel.

Study on Hydraulic Characteristic of Aerator with Side-Walls Sudden Enlargement in Free-Flow Spillway Tunnel

2012 ◽  
Vol 614-615 ◽  
pp. 613-616 ◽  
Author(s):  
Hai Yun Wang ◽  
Qing Yang ◽  
Guang Qing Dai ◽  
Chao Liu
Keyword(s):  
High Speed ◽  
Air Entrainment ◽  
Free Flow ◽  
Bottom Cavity ◽  
Lateral Cavity ◽  
Sudden Enlargement ◽  
Side Walls ◽  
Spillway Tunnel ◽  
Forced Aeration ◽  
Engineering Practices

Engineering practices showed side-walls in free-flow discharge tunnels with high speed flows and low pressure tended to be damaged by cavitation, especially behind concave reach. In this paper through experiment an aerator with side-walls sudden enlargement and soleplate vertical dropping was introduced on the concave reach bottom of the Vertical-Bend free-flow spillway tunnel side-walls. By applying this type of aerator, air entrainment increases significantly and un-airflow areas disappear. Experimental observations show that lateral cavity and bottom cavity are linked to each other and the forced aeration forms behind the aerator, which protects sidewalls and soleplates against cavitation damage.

scholarly journals Investigation of the surface vortex in a spillway tunnel intake

2010 ◽  
Vol 15 (5) ◽  
pp. 561-565 ◽  
Author(s):  
Yingkui Wang ◽  
Chunbo Jiang
Keyword(s):  
Spillway Tunnel ◽  
Surface Vortex

Numerical Simulation of Ventilation Characteristics in a Hydropower Station Spillway Tunnel with High Head and Large Discharge

2014 ◽  
Vol 926-930 ◽  
pp. 3527-3530
Author(s):  
Hong Qing Zhang ◽  
Yi Long Lou ◽  
Wei Ping Xing ◽  
Jun Jun Tan
Keyword(s):  
Wind Speed ◽  
Hydropower Station ◽  
Aerated Flow ◽  
Speed Distribution ◽  
Vof Model ◽  
High Head ◽  
Spillway Tunnel ◽  
The Right ◽  
Ventilation Hole ◽  
Large Discharge

High wind speedandloudnoise usually occur in the hydropower station spillway tunnel, which will impact the producing environment of operators. In this paper, turbulent model and VOF modelwere combinedto simulate wind speed and the volume of ventilated airin ventilation holeandthreeaeratorsin the spillway tunnel on the right bank of a hydropower station in China. The results show thatVOF modelcan well simulate ventilated air induced by water drag, andthe volume of ventilated air in ventilation hole is the largest.Wind speed distribution on the longitudinal sectionof the inlet of ventilation hole is non-uniform,and loud noisewill occurthere. Wind speed on the left side of three aerators is higher than that on the right side. The results of the volume of ventilated airin threeaerators simulated by VOF modelare credible, but we should improve the VOF model to more accurately simulate aerated flow.

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