本文關(guān)鍵詞： 多孔排水管 多孔出流 模型試驗 壓力分布 壓差 短管 虹吸井　出處：《南水北調(diào)與水利科技》2017年01期 　論文類型：期刊論文

【摘要】：高緯度沿海地區(qū)的核電廠冬季運行時常會遇到取水口結(jié)冰問題,影響正常運行,一種解決方案是通過多孔排水管將電廠循環(huán)水引至泵站前池,提高水溫,防止取水水域冰塞的發(fā)生。建立了虹吸井多孔排水管物理模型,研究了多孔排水管的水力特性,包括沿程壓力分布特點,壓差變化規(guī)律等,提出了多孔短管內(nèi)部壓力變化的無量綱公式,各試驗工況計算值和實測值的最大平均誤差為0.88%。研究表明:(1)多孔排水管壓力恢復(fù)現(xiàn)象是流速水頭向壓力水頭轉(zhuǎn)化的結(jié)果,且流速水頭越大,壓力恢復(fù)現(xiàn)象越明顯。(2)出水管壓力水頭在下游出現(xiàn)突升現(xiàn)象,是多孔管中流線在出水管處發(fā)生偏移,部分水流對下游沖擊造成的。試驗結(jié)果為類似多孔排水管的設(shè)計及應(yīng)用提供參考依據(jù)。
[Abstract]:The winter operation of nuclear power plants in high latitude coastal areas often meets the problem of water intake freezing, which affects normal operation. One solution is to draw circulating water from power plant to the front pool of pumping station through porous drainage pipes to raise the water temperature. The physical model of the porous drain pipe in siphon well is established, and the hydraulic characteristics of the porous drain pipe are studied, including the characteristics of pressure distribution along the course, the variation of pressure difference and so on. A dimensionless formula for pressure variation in porous short tubes is presented. The maximum average error between the calculated value and the measured value is 0.88. The research shows that the pressure recovery phenomenon of the porous drain pipe is the result of the transformation from the velocity head to the pressure head, and the larger the velocity head is. The pressure recovery phenomenon is more obvious. 2) the pressure head of the outlet pipe suddenly rises downstream, which is the deviation of the streamline line at the outlet pipe in the porous pipe. The test results provide a reference for the design and application of similar porous drainage pipes.
【作者單位】： 河北工程大學(xué);中國水利水電科學(xué)研究院流域水循環(huán)模擬與調(diào)控國家重點實驗室;山東農(nóng)業(yè)大學(xué);
【分類號】：TV134
【正文快照】： 網(wǎng)絡(luò)出版地址:http://www.cnki.net/kcms/detail/13.1334.TV.20170104.1016.020.html多孔管在化工、電力、通風(fēng)供熱、水利噴灌、污水排放等工程中多有應(yīng)用。當(dāng)多孔管作為一種均勻分布裝置使用時,其配水的均勻度就成了主要關(guān)注要素,伍欽[1]等通過能量和質(zhì)量衡算關(guān)系導(dǎo)出了等直

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