叙泸段河道非恒定流作用下水力参数的变化

发布时间：2018-06-02 21:05

  本文选题：向家坝水电站 + 非恒定流　； 参考：《水运工程》2017年10期

【摘要】：金沙江与岷江干支流上水电站调峰发电下泄非恒定流引起下游叙泸段河道水流条件显著变化。结合一维非恒定流数学模型和实测资料分析研究叙泸段河道内代表性非恒定流传播过程及其造成水力参数相对于概化恒定流条件时的变化情况。结果表明:叙泸段河道内典型非恒定流波长为218 km,传播速度3 m/s;随着传播距离增加波衰减幅度减小,波形变得光滑;当宜宾水位处于波峰时,下游沿程流量呈现递减趋势,波谷则正好相反;相对于恒定流条件,其流量变化范围为0~730 m3/s,水位抬升0.5~2 m;断面平均流速变化在-0.5~0.2 m/s,比降变化范围为-0.2‰~0.2‰,比降最大值为1.38‰。
[Abstract]:The unsteady discharge of peak shaving power generation on the tributaries of Jinsha River and Minjiang River causes significant changes in the flow conditions of the downstream Xuzhou section. Based on the mathematical model of one-dimensional unsteady flow and the measured data, the propagation process of representative unsteady flow in Xuzhou section and the variation of hydraulic parameters relative to the generalizable constant flow condition are studied. The results show that the wavelength of the typical unsteady flow is 218 km, the propagation velocity is 3 m / s, the attenuation amplitude of the wave decreases with the increase of the propagation distance, the waveform becomes smooth, and when the water level in Yibin is at the peak, the flow along the downstream decreases. Compared with the constant flow condition, the variation range of discharge is 0 ~ 730 m ~ 3 / s, the elevation of water level is 0.5 ~ 2 m, the mean velocity of section is -0.5 ~ (0.2) m / s, the specific drop range is -0.2 鈥，

本文编号：1970181