水平旋转内消能泄水道的流态序列、分区特性及临界条件

本文给出竖井进流水平旋转内消能泄水道的基本流态序列、过渡特性及临界水力条件。这种泄水道的流态可根据空腔环流内的气体压强、空腔直径和通气孔的通气量的变化规律分为淹没流流态、吸允流流态和自由流流态；空腔环流形成的水力条件为(H-h)／h大于2．5或Fr大于0．46；各流态转变过程中有明显的过渡段性质；在不同的流态分区内物理量的变化规律是不同的。

Basic flow pattern and critical hydraulic condition of rotary cavity flow in horizontal internal energy dissipation discharge tunnel with a shaft-inlet

This paper presents observed result of basic flow pattern and critical hydraulic condition of rotary cavity flow in a typical horizontal internal energy dissipation discharge tunnel with a shaft-inlet. According to air pressure inside rotary cavity flow, cavity diameter of rotary cavity flow and ventilation volume of air hole, basic flow pattern of this type of tunnel can be classified as submerged, absorbing and free flow patterns. There is obvious transition state between flow patterns. Physical variables vary with different flow patterns. The hydraulic condition of cavity rotary flow formation is that (H-h)/h is over 2.5 or F_(r) is over 0.46.