高寒区引水渠道抽水融冰水温变化过程模拟  

Simulation on water temperature change process of diversion channel for pumping well water to melt ice at high altitude and cold regions

作　　者：吴素杰 宗全利[1] 郑铁刚[2] 刘贞姬[1] 黄酒林 

机构地区：[1]石河子大学水利建筑工程学院,石河子832000 [2]中国水利水电科学研究院流域水循环模拟及调控国家重点实验室,北京100038

出　　处：《农业工程学报》2016年第14期89-96,共8页Transactions of the Chinese Society of Agricultural Engineering

基　　金：国家自然科学基金资助项目(51269028);2015年度留学人员科技活动择优资助项目

摘　　要：抽水融冰技术能解决中国西北等高寒地区引水式水电站引水渠冰害。该文以新疆红山嘴电站引水渠道为研究对象,对引水渠道抽水融冰水温变化过程进行数值模拟。通过对模拟结果与原型观测结果对比研究,验证数值模型的可靠性。最后分别模拟分析井水流量、渠道流量、井水温度、渠道水温、流量和温度同时变化时,引水渠道水温沿程变化规律。结果表明：1）井水流量和井水温度变化与混合后水温成正比,井水流量越大,水温越高,渠道增温效果越明显;2）渠道流量变化与混合后水温成反比,渠道流量越大,井水的增温效果越不明显;3）渠道水温与混合后水温成正比,渠道水温越低,混合后水温也越低;4）渠道引水温度降低为原来0.25倍,同时井水流量增大至原来4倍,混合后水温比降低渠水温度时高0.14-1.43℃,在实际工程中,增加井水流量是抽水融冰最有效的方法。研究为寒区引水渠道冰害的防治提供科学依据。In the northwest alpine regions, pumping well water to melt ice（PWWMI） is an effective method to solve the ice problem for diversion power station in winter. In this study, the diversion channel of Hongshanzui Water Power Station in Manas River of Xinjiang was selected as the study area（86°03′15″E and 44°05′01″N） and a field survey was conducted in February 2013 to analyze the change process of water temperature. The prototype observation results yielded a series of indicators, including the temperature and discharge of well water, and the temperatures of channel water before and after well. Based on the diversion channel of Hongshanzui Water Power Station, a three-dimensional turbulence numerical model was proposed to simulate the change process of water temperature of diversion channel for PWWMI. The discharge and temperature of 5# well water was taken as the initial boundary, different values of water temperature distance from 5# well were predicted. The change process of water temperature obtained from prototype observation experiment was compared with the simulation results, and the results indicate that the simulation results were in a good agreement with the experimental results, which can ensure the reliability of the simulation results. Thus, the changes of water temperature were simulated under different discharge and temperature conditions, including different discharges of well and channel water, different temperatures of well and channel water, and the changes of temperature and discharge simultaneously. The results showed that the changes of discharge and temperature of well water, and temperature of channel water were proportional to mixed water temperature, and the temperatures of mixed water increased with the increases of discharge of well water and temperatures of well and channel water, respectively. When the discharges of well water were increased by 1.2 and 1.4 times, decreased by 0.6 and 0.8 times compared with the original value of 0.16 m3/s, the temperatures of mixed wat

关 键 词：融化 温度 井 水 抽水融冰 数值模拟 引水渠道 高寒区 

分 类 号：TK79[动力工程及工程热物理—流体机械及工程]