Yunnan Jinsha River Hydropower Development Corporation Ltd

Kunming, China

Yunnan Jinsha River Hydropower Development Corporation Ltd

Kunming, China

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Zhang S.,Kunming University of Science and Technology | Hu X.,Yunnan Jinsha River Hydropower Development Corporation Ltd | Li X.,Kunming University of Science and Technology
Advanced Materials Research | Year: 2013

Ring gate of Ahai hydropower Station is known to the highest ring gate in the world. In this paper, it is calculated to the driving loads of the Ahai ring gate by six hydraulic servomotors during a closure without automatic control (i.e. in case of a breakdown of the electrical control system), analyzed the behavior of the operating system of the ring gate closure in balanced conditions with the permanent loads, and finally shown to how the six servomotors are synchronized on the basis of the driving loads. There are proved to The feasibility and the credibility of this system of ring gate to a case by using ANSYS. © (2013) Trans Tech Publications, Switzerland.


Zhang S.,Kunming University of Science and Technology | Hu X.,Yunnan Jinsha River Hydropower Development Corporation Ltd | Zhang L.,Kunming University of Science and Technology | Yu F.,Kunming University of Science and Technology | Li C.,Kunming University of Science and Technology
Shuili Fadian Xuebao/Journal of Hydroelectric Engineering | Year: 2011

Three-dimensional turbulent flows through turbine runner with long and short blades of a Francis turbine HLA351 were numerically simulated with FLUENT that uses the Reynolds equations and a realizable k-ε turbulent model in a general coordinate frame. The results show that the details of full-passage flow can be well predicted, and that hydraulic performance of the runner with long and short blades is better in terms of its velocity and pressure distributions. These results would be useful for hydraulic design and optimization of Francis turbine. © Copyright.


Zhang S.,Kunming University of Science and Technology | Hu X.,Yunnan Jinsha River Hydropower Development Corporation Ltd | Zhang L.,Kunming University of Science and Technology | Yu F.,Kunming University of Science and Technology | Li C.,Kunming University of Science and Technology
Shuili Fadian Xuebao/Journal of Hydroelectric Engineering | Year: 2012

CFD simulation of three-dimensional unsteady turbulent flow through a Francis turbine HLA351 runner with long and short blades was conducted with initial steady flow conditions, and the simulation data of pressure fluctuations on various components were analyzed in details. The results show the details of wellpredicted flow field in the runner and the pattern of fluctuating pressure generation and propagation in the turbine. These results would provide a guideline for turbine design and optimization.


Zhang S.,Kunming University of Science and Technology | Li X.,Kunming University of Science and Technology | Hu X.,Yunnan Jinsha River Hydropower Development Corporation Ltd | Ma G.,Kunming University of Science and Technology
Applied Mechanics and Materials | Year: 2013

The protective effect of isolated operation Mode on Micro-grid was studied in this paper employing the method of contrast analysis. A model of Micro-grid system powered by wind and hydro was built using Matab/Simulink to simulate the two modes of isolation and connection under the circumstance of public power grid fault. Results show that the isolated operation mode of micro-grid is effective and necessary. © (2013) Trans Tech Publications, Switzerland.


Jiang B.-H.,University of Sichuan | Hou J.,University of Sichuan | Yang K.-J.,University of Sichuan | Cao S.-Y.,University of Sichuan | And 2 more authors.
Sichuan Daxue Xuebao (Gongcheng Kexue Ban)/Journal of Sichuan University (Engineering Science Edition) | Year: 2014

Based on the Shiono and Knight method(SKM) and the secondary flow motion characteristics, the determination of the lateral distribution of depth-averaged velocity in compound channels with one-line vegetation along the edge of the floodplain was proposed. The results showed that there is large disagreement between the computed results and the experiment data, especially in the main channel, when the secondary flow is ignored. When using the traditional divisions of sub-region, the prediction doesn't largely agree with the experiment data. However, the results showed that by considering the effect of secondary flow, increasing the division of sub-regions and adjusting the available parameters for each region, the proposed method can be capable of predicting the lateral distributions of depth-averaged velocity in this type of channel.


Jiang B.-H.,University of Sichuan | Yang K.-J.,University of Sichuan | Cao S.-Y.,University of Sichuan | Chen L.,Yunnan Jinsha River Hydropower Development Corporation Ltd
Shuili Xuebao/Journal of Hydraulic Engineering | Year: 2012

Compound channels composed of the main channel and its associated floodplains widely exist in natural rivers. When water in the main channel flows in an out-of-bank manner onto the adjoining floodplain, the flow structure is usually very complex. However, in natural rivers, floodplains and river banks are often home to many kinds of vegetation. Generally, such vegetation increases stabilization for banks and channels, but also increases the flow resistance and changes the velocity distribution and affects the discharge capacity. Hence, how to determine the velocity distribution and discharge become very important. In this paper, based on the equivalent balance of flow resistance, the equivalent additional resistance coefficient and equivalent composite resistance coefficient of vegetated channels are proposed. Then using the Shiono and Knight method (SKM) together with the proposed equivalent composite resistance method, the lateral distribution of depth-averaged velocity in compound channels with vegetated floodplains are determined. The results show that the computational method for composite resistance coefficient in the vegetated compound channel is feasible and can give good predictions for the velocity distribution for the type of channel, combining the SKM.


Hu X.,Yunnan Jinsha River Hydropower Development Corporation Ltd
Applied Mechanics and Materials | Year: 2012

Ring gate of Ahai hydropower Station is known to the highest ring gate in the world. In this paper, it is calculated to the driving loads of the Ahai ring gate by six hydraulic servomotors during a closure without automatic control (i.e. in case of a breakdown of the electrical control system), analyzed the behavior of the operating system of the ring gate closure with the water discharge and closure with three wicket gates not synchronized (i.e. three wicket gates remained accidentally in open position), and finally shown to how the 6 servomotors are synchronized on the basis of the driving loads. There are proved to The feasibility and the credibility of this system of ring gate by using ANSYS to a case. copy; (2012) Trans Tech Publications, Switzerland. © (2012) Trans Tech Publications, Switzerland.

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