Numerical simulation of breast wall with pressure section of spillway sluice
YUE Shubo1, ZHANG Hongqing1*, DIAO Mingjun2, DAI Shangyi3
1. Zhejiang Institute of Hydraulic and Estuary, Hangzhou, Zhejiang 310020, China; 2. State Key Laboratory of Hydraulics and Mountain River Engineering, Sichuan University, Chengdu, Sichuan 610065, China; 3. Southwest Municipal Engineering Design and Research Institute of China, Chengdu, Sichuan 610065, China
Abstract The RNG k-ε turbulent numerical model was adopted to simulate the flow characteristic of the breast wall with different slope pressure sections at the exit of the spillway sluice. The streamline, the flow velocity and the pressure were obtained to analyze the different influences of the different slopes on the discharge capacity of the spillway, the phenomenon of current off the wall and the distribution of the negative pressure. The results show that the discharge capacity is weakened, the phenomenon of current off the wall is avoided, and the maximum and distribution area of the negative pressure are lessened, when the slope of the pressure section becomes sharp. Flat slope type should be avoided in the design process. By a reasonable way, we can select a suitable type for a project is beneficial to improve the efficiency of energy dissipation of stilling basin and avoid the cavitation erosion of the pressure slope section, so as to enhance the security of the project. The results and the methods can provide particular guidance to the optimization design and operation of the similar projects.
YUE Shu-Bo-,ZHANG Hong-Qing-*,DIAO Ming-Jun- et al. Numerical simulation of breast wall with pressure section of spillway sluice[J]. Journal of Drainage and Irrigation Machinery Engin, 2019, 37(6): 491-497.
NGUYEN C T, WANG L L. Physical and numerical model of flow through the spillways with a breast wall[J]. Journal of civil engineering, 2015,19(7 ): 2317-2324.
NGUYEN C T, WANG L L,Tang H W. The effect of a curved bed on the discharge equation in a spillway with a breast wall[J].Journal of hydrodynamics, 2015, 27(2):311-318.
LIU Shiyu.Discharge capacity study on the parapet walls with rectangular spillway[J].Journal of water resources and hydropower technology, 1980, 11(4): 15-17.(in Chinese)
LUO An, HUANG Zhimin, CHEN Zhuoying. Discharge capacity analysis and application to improve the parapet walls with orifice spillway[J].Journal of Guangdong water conservancy and hydropower, 1997, 25(4): 16 -18.(in Chinese)
LIAN Huiping, ZHAO Ting. Hydraulic calculation and model test on the sluice gate of Xixiayuan station on the Yellow River[J].Journal of yellow river conservancy technical institute,2012,24(1):4-6.(in Chinese)