虹吸井工程中多孔排水管沿程压力分布特性

发布时间：2018-01-26 01:06

本文关键词： 多孔排水管多孔出流模型试验压力分布压差短管虹吸井　出处：《南水北调与水利科技》2017年01期 　论文类型：期刊论文

【摘要】：高纬度沿海地区的核电厂冬季运行时常会遇到取水口结冰问题,影响正常运行,一种解决方案是通过多孔排水管将电厂循环水引至泵站前池,提高水温,防止取水水域冰塞的发生。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,包括沿程压力分布特点,压差变化规律等,提出了多孔短管内部压力变化的无量纲公式,各试验工况计算值和实测值的最大平均误差为0.88%。研究表明:(1)多孔排水管压力恢复现象是流速水头向压力水头转化的结果,且流速水头越大,压力恢复现象越明显。(2)出水管压力水头在下游出现突升现象,是多孔管中流线在出水管处发生偏移,部分水流对下游冲击造成的。试验结果为类似多孔排水管的设计及应用提供参考依据。
[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.
【作者单位】：河北工程大学;中国水利水电科学研究院流域水循环模拟与调控国家重点实验室;山东农业大学;
【分类号】：TV134
【正文快照】： 网络出版地址:http://www.cnki.net/kcms/detail/13.1334.TV.20170104.1016.020.html多孔管在化工、电力、通风供热、水利喷灌、污水排放等工程中多有应用。当多孔管作为一种均匀分布装置使用时,其配水的均匀度就成了主要关注要素,伍钦[1]等通过能量和质量衡算关系导出了等直

【相似文献】