连接管速度头和动量项对调压室稳定面积的影响

• 作 者: 杨建东 赖旭 陈鉴治
• 机 构: 武江水利电力大学水力发电工程系
• 出 处: 水利学报
• 发表日期: 1995年07期
• 关键词: 调压室 动量交换 分岔管 断面积 连接管 量项 尾水隧洞 电能损失 水头损失 计算公式

本文运用Ｇａｒｄｅｌ的Ｔ型分岔管水头关系式，分析了连接管处速度头和动量交换项对下游调压室稳定断面积的影响．在托马假定的前提下，导出了相应的计算公式．从而在理论上证明了连接管处速度头对下调稳定不利，而动量交换项则是有利的，两者作用可大致抵消，结果接近简单式调压室的托马断面．若合理选取连接管的尺寸和型式，可进一步减小下调水位波动稳定所需的断面积．

In this paper, Gardel’s T-type bifurcation head-head relationship is used to analyze the influence of velocity head and momentum exchange on the stable cross-sectional area of ​​the downstream surge chamber. Under the assumption of Toma, the corresponding formulas are derived. It proves theoretically that the velocity head of the connecting tube is disadvantageous to the stabilization of the downward regulation, while the momentum exchange term is beneficial. The two effects can be counteracted and the result is close to the simple horse-type section of the surge chamber. If the size and type of connecting pipe are reasonably selected, the cross-sectional area needed to reduce the fluctuation of water level can be further reduced.