Guangdong Key Laboratory of Hydrodynamic Research

Guangzhou, China

Guangdong Key Laboratory of Hydrodynamic Research

Guangzhou, China
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Liu D.,China Institute of Water Resources and Hydropower Research | Liu D.,Guangdong Key Laboratory of Hydrodynamic Research | Liao H.,University of Sichuan | Li L.,University of Sichuan | And 3 more authors.
Sichuan Daxue Xuebao (Gongcheng Kexue Ban)/Journal of Sichuan University (Engineering Science Edition) | Year: 2014

To testify whether large eddy simulation method can be applied to simulate the hydraulic characteristics in stilling basin with shallow-water cushion(SBSWC), a systematic comparison of calculation and experiment was conducted. It was shown that the flow regimes, velocity fields and pressures distributions obtained from LES are in good agreement with the experimental data, which indicated that it is reasonable to use LES to simulate the complex flow characteristics in SBSWC.


Liu D.,University of Sichuan | Liu D.,China Institute of Water Resources and Hydropower Research | Liu D.,Guangdong Key Laboratory of Hydrodynamic Research | Li L.-X.,University of Sichuan | And 3 more authors.
Shuili Xuebao/Journal of Hydraulic Engineering | Year: 2012

A new type of stilling basin with double shallow-water cushions was proposed based on a model for the Luding Hydropower Project. The hydraulic performances of the new type stilling basin such as flow pattern, water surface profile, velocity and pressure distributions were studied by means of numerical simulation using 3D RNG k-ε turbulence model, which are in good agreement with the experimental data. Both numerical and experimental results indicate that the proposed double shallow water cushions can make full advantages of water-cushion to reduce the velocity near the bottom effectively, redistribute the pressure on stilling basin floor, and significantly improve the energy dissipation rate.


Liu D.,University of Sichuan | Liu D.,China Institute of Water Resources and Hydropower Research | Liu D.,Guangdong Key Laboratory of Hydrodynamic Research | Li L.-X.,University of Sichuan | And 4 more authors.
Sichuan Daxue Xuebao (Gongcheng Kexue Ban)/Journal of Sichuan University (Engineering Science Edition) | Year: 2012

Complex sand-flushing system results in the disproportion of discharge through each outlet and the disparity of each funnel range. Simultaneously, hydraulic characteristics in connection part between sand-discharging outlet and the gallery is very complicated. Therefore, it is very difficult to achieve wide funnel range and good pressure characteristic by the simple operation schemes while keeping the form of sand-flushing structure. Based on hydraulic model test of sand-flushing system in the intakes of Longtoushi hydropower station in Dadu River, operation schemes were studied by physical models. The results revealed that the funnel range can be wide and pressure characteristic be good by means of changing operation scheme of the sand flushing system, which has important engineering and economic impacts for designing operation scheme of similar sand-flushing system of water intake.


Liu D.,China Institute of Water Resources and Hydropower Research | Liu D.,Guangdong Key Laboratory of Hydrodynamic Research | Huang B.-S.,China Institute of Water Resources and Hydropower Research | Huang B.-S.,Guangdong Key Laboratory of Hydrodynamic Research | And 2 more authors.
Shuili Xuebao/Journal of Hydraulic Engineering | Year: 2013

Complex sand-flushing system results in the disproportion of discharge through each outlet and the disparity of each funnel range. Simultaneously, hydraulic characteristics in connection part between sand-discharging outlet and the gallery are very complicated. Therefore, it is very difficult to achieve the wide funnel range and the good pressure characteristic at the same time by the simple operation schemes while keeping the form of sand-flushing structure. Based on hydraulic model test of sand-flushing system in the intakes of Longtoushi hydropower station in the Dadu River, operation schemes were studied by numerical simulation method. The results revealed that the funnel range can be wide and pressure characteristic can be good by means of changing operation scheme of the sand flushing system, which has important engineering and economic impacts on operation scheme design for similar sand-flushing system of water intake.


Liu D.,University of Sichuan | Liu D.,China Institute of Water Resources and Hydropower Research | Liu D.,Guangdong Key Laboratory of Hydrodynamic Research | Li L.-X.,University of Sichuan | And 3 more authors.
Procedia Engineering | Year: 2012

Slope approximation method is generally used in numerical simulation of SKM that contains channel cases with vertical wall. However, systemic study on the influences to the precision of SKM method by slope approximation can be hardly found. In order to tackle the issue, sensitivity analysis by using slope approximation method with different approximated angles has been conducted. The result showed that impact on the velocity distribution by the approximated angle is local, but disparity of the velocity distribution in main channel is obvious. It comes to the conclusion that slopping approximation algorithm neither solves the discontinuity at interface with vertical wall nor obtains accurate depth-averaged velocity and shear stress distribution in lateral direction. © 2012 Published by Elsevier Ltd.

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