关键词: 水工模型实验, 消能效率, 消能比重, 井底压强,  , 消力井

Abstract:

With indoor experiment on the hydraulic model of square baffle well, the energy dissipation ratio of square baffle and the well bottom pressure variation law are analyzed to provide reference for the application of baffle well. The experiment shows that the energy dissipation ratio between baffle well and gate valve tends to be a stable value when the pipe flow reaches a certain degree. It reveals that most of the energy in pipeline is dissipated in the gate valve, so the gate valve plays a key role in the process of energy dissipation. Meanwhile, the bottom central pressure is greater than hydrostatic pressure in the well, while the bottom pressure near the wellwall is less than the hydrostatic pressure in the well, which verifies that the bottom central area is in a scouring state, and the bottom hole near the wall is in a state of negative pressure.

Key words: hydraulic model experiment, energy dissipation efficiency, energy dissipation ratio, bottom central pressure, energy baffle well