本文選題：向家壩水電站 + 非恒定流��； 參考：《水運(yùn)工程》2017年10期

【摘要】：金沙江與岷江干支流上水電站調(diào)峰發(fā)電下泄非恒定流引起下游敘瀘段河道水流條件顯著變化。結(jié)合一維非恒定流數(shù)學(xué)模型和實(shí)測(cè)資料分析研究敘瀘段河道內(nèi)代表性非恒定流傳播過(guò)程及其造成水力參數(shù)相對(duì)于概化恒定流條件時(shí)的變化情況。結(jié)果表明:敘瀘段河道內(nèi)典型非恒定流波長(zhǎng)為218 km,傳播速度3 m/s;隨著傳播距離增加波衰減幅度減小,波形變得光滑;當(dāng)宜賓水位處于波峰時(shí),下游沿程流量呈現(xiàn)遞減趨勢(shì),波谷則正好相反;相對(duì)于恒定流條件,其流量變化范圍為0~730 m3/s,水位抬升0.5~2 m;斷面平均流速變化在-0.5~0.2 m/s,比降變化范圍為-0.2‰~0.2‰,比降最大值為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，

本文編號(hào)：1970181