小波动状况下简单式调压室水位波动分析

Water Level Fluctuation Analysis of Simple Surge Chamber under Small Fluctuation

计算电站微小负荷变化导致水位小幅波动时,由于调压室水位波动情况复杂,需编制相应体型非恒定流计算程序来解决。根据简单式调压室基本方程推导出了解析法,应用泰勒展开式将引水道和调压室的动量方程的摩阻损失线性简化,通过求解常微分方程即可得出流量瞬时改变或流量随时间改变时调压室中的水位波动方程,进而可分析水位波动振幅的衰减并验证了调压室的稳定性。

Water level fluctuation of the surge chamber is considerable complex, so the calculation of small fluctuation caused by samll variation load needs to be developed unsteady flow shape program. This paper deduces the analytical method in terms of the basic equations of simple surge chamber. Taylor expansion is used to simplify equation of friction loss linear model in momentum of derivation tunnel and surge chamber. Water level fluctuation can be obtained for instan- taneous flow change or flow variation with time by solving the differential equation. It can analyze the attenuation of water level fluctuation and verify the stability of the surge chamber.