寒区引水明渠抽水融冰试验

发布时间：2018-06-18 16:39

  本文选题：寒区 + 引水明渠　； 参考：《武汉大学学报(工学版)》2017年02期

【摘要】：寒区冬季明渠引水长期遭受冰害困扰,严重制约工农业及居民生活用水,经济损失巨大.结合新疆红山嘴水电站2级引水明渠,采用原型观测方法,开展了2次抽水融冰试验.根据试验结果,分析了不同水井运行方式下,井后明渠沿程水温、井前后5m明渠水温及整个引水明渠沿程水温的变化情况,得到了上述情况下明渠水温的变化规律及水井运行制度对水温变化的影响.处于运行状态的水井井后明渠水温得到了显著提高,在井后50m范围内,水温急剧下降,并产生较大波动,超出该范围后,水温下降不明显,波动也相对平缓;井水和渠水的混掺及渠水与外界的热交换过程并不能在短时间、短距离内完成.2次试验气温基本相同,试验过程中明渠末端水温相差不大,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，

本文编号：2036135