Author(s): Caihuan Wang, Wengang Duan, Dongmei Hou
Linked Author(s): HOU Dongmei
Keywords: Multi-Level Intake Structure, low temperature water discharge, stoplog gate, hydropower station, experimental study.
Abstract: With the development of high dam hydropower station construction, the harmful effect of cold water cannot be ignored. MLIS (Multi-Level Intake Structures) are usually set up in front of the station inlet to take surface water of the reservoir, thus reducing the negative effect of the cold water to downstream ecological environment, which is widely used as an effective method to reconcile the contradiction between the project construction and environment protection. However, MLIS will significantly change the hydraulic characteristic of inlet. Thus, in this study, a model test study about the MLIS, the study on the height of the MLIS in different reservoir levels, the characteristic swirl of the inlet structure, the fluctuating pressure upon the stoplog gate and the effect of the stoplog gate to the head loss of the inlet and the pressure distribution, and the study on the characteristics of the water hammer pressure when the generator was shutdown were conducted. Then, a comprehensive understanding on MLIS was obtained, which have significant value for similar projects
Year: 2017