本文選題：寒區(qū) + 引水明渠��； 參考：《武漢大學學報(工學版)》2017年02期

【摘要】：寒區(qū)冬季明渠引水長期遭受冰害困擾,嚴重制約工農(nóng)業(yè)及居民生活用水,經(jīng)濟損失巨大.結(jié)合新疆紅山嘴水電站2級引水明渠,采用原型觀測方法,開展了2次抽水融冰試驗.根據(jù)試驗結(jié)果,分析了不同水井運行方式下,井后明渠沿程水溫、井前后5m明渠水溫及整個引水明渠沿程水溫的變化情況,得到了上述情況下明渠水溫的變化規(guī)律及水井運行制度對水溫變化的影響.處于運行狀態(tài)的水井井后明渠水溫得到了顯著提高,在井后50m范圍內(nèi),水溫急劇下降,并產(chǎn)生較大波動,超出該范圍后,水溫下降不明顯,波動也相對平緩;井水和渠水的混摻及渠水與外界的熱交換過程并不能在短時間、短距離內(nèi)完成.2次試驗氣溫基本相同,試驗過程中明渠末端水溫相差不大,都在1.5℃左右.
[Abstract]:In winter, the open channel water diversion in cold region suffers from ice damage for a long time, which seriously restricts the water consumption of industry, agriculture and residents, resulting in huge economic losses. Combined with the open diversion channel of Grade 2 of Hongshanzui Hydropower Station in Xinjiang, two ice melting tests were carried out by means of prototype observation method. According to the test results, the variation of the water temperature along the open channel behind the well, the water temperature of 5m open channel before and after the well, and the water temperature of the whole diversion channel are analyzed under different operation modes of the well. The variation law of open channel water temperature and the influence of well operation system on water temperature change are obtained. The open channel water temperature of the well in the running state has been remarkably increased. Within the range of 50 m behind the well, the water temperature drops sharply and produces great fluctuation. When the water temperature exceeds this range, the water temperature drops not obviously, and the fluctuation is relatively gentle. The mixing of well water and canal water and the process of heat exchange between canal water and the outside world can not be done in a short time. The temperature of 2 times test completed in a short distance is basically the same, and the water temperature at the end of the open channel is not different in the course of the test, all of them are about 1.5 鈩，

本文編號：2036135