阻抗式调压室水位小波动稳定性研究  

Study on the Stability of Small Undulation in the Orifice Surge Tank

作　　者：杨玲霞[1] 吴建平[1] 

机构地区：[1]郑州工业大学水利与环境工程学院,河南郑州450002

出　　处：《郑州工业大学学报》1999年第3期4-5,44,共3页Journal of Zhengzhou University of Technology

基　　金：河南省自然科学基金

摘　　要：针对阻抗式调压室水位波动时底部水流的流态特性，分析了小波动情况下阻抗损失的变化规律，认为按阻抗损失与速度的一次方成比例来考虑阻抗作用较为合理．将其引入基本方程式中进行稳定性分析后，推导出阻抗式调压室水位在小波动情况下的稳定条件及临界稳定断面计算公式．结果表明，选择适当大小的阻抗型式，有助于提高调压室水位小波动的稳定性。According to the fluid characteristics of the bottom current about the water level undulation in the orifice surge tank, this paper discusses the orifice loss of the orifice surge tank in the case of small water level undulation,and considers it reasonable that orifice loss is proportional to the first power of velocity.Then, stability of small undulation is investigated by leading the above into the fundamental equation. Stability judgement term and the method for calculating the critical stable cross-sectional area in the case of small water level undulation in the orifice surge tank are given. The result indicates that, if suitable orifice loss of the orifice surge tank is selected,the stability of the orifice surge tank in the case of small water level oscillation is improved, and also the critical stable cross-sectional area is less than Thoma's critical stable cross-setional area.

关 键 词：调压室 阻抗式 稳定断面 水位波动 水流 

分 类 号：TV732.5[水利工程—水利水电工程]