Experimental Research on Structure Optimization of Energy Dissipation of Myitsone Hydropower Station

摘要

On weir surface and middle orifice local physical model with geometry scale of 1:60, energy dissipation capacity, velocity and flow pattern* pressure distribution and related hydraulics problem of Myitsone hydropower station discharging structure layout were tested. Basic practicable discharging structure pattern and stilling pool pattern were put forward, though comparison and optimization of more than ten schemes. The stud-y result shows that the surface orifice adapt proper pattern of flaring gate pier was favorable to increase the energy dissipation efficiency and shorten the length of stilling pool, but had no effect on the phenomenon of water wing hitting both sides of sidewall caused by flaring gate pier, the schemes of canceling flaring gate pier of surface orifice and adapting the declined pattern stilling pool could decrease the stilling pool base slab velocity of under flow energy dissipation efficiently, at the same time diminish the phenomenon of water wing hitting sidewall of both sides caused by flaring gate pier and obtain certain satisfying energy dissipation effect. The more than ten energy dissipation research schemes in this paper have reference value for all similar engineering project design and science research.