简单管路中水击的类型偏误分析及解析计算

发布时间：2018-07-14 10:19

【摘要】：简单管路的水击分析是水电站设计的重要部分。该文对目前设计中采用的阀门开度匀速变化时水击的解析计算中存在的问题进行研究,详细推导和分析水击计算的区域划分,给出了正确的负水击区域划分图;通过以直线代替曲线的方式,提出足够精确的简化水击区域划分图;通过与精确水击区域划分图的比较,阐明了简化水击计算中可能出现的类型误判;基于直接求取水击最大值的考虑,提出第一相水击和末相水击类型的后验判别方法。此外,还给出了直接水击和第一相水击的直接计算公式。算例分析表明:该文给出的水击区域划分、提出的水击类型后验判别方法以及推导的水击直接计算公式正确可行。
[Abstract]:Water hammer analysis of simple pipeline is an important part of hydropower station design. In this paper, the problems existing in the analytical calculation of water hammer with constant valve opening are studied, the division of water hammer area is deduced and analyzed in detail, and the correct partition diagram of negative water hammer is given. By replacing the curve with a straight line, the paper puts forward a simplified water hammer area partition map with sufficient accuracy, and illustrates the possible types of misjudgment in the simplified water hammer calculation by comparing with the accurate water hammer area partition chart. Based on the consideration of calculating the maximum value of water hammer directly, a posterior discrimination method for the type of water hammer in the first phase and the final phase is proposed. In addition, the direct calculation formulas of direct water hammer and first phase water hammer are given. The analysis of an example shows that the water hammer area is divided, the posteriori judgment method of water hammer type and the direct calculation formula of water hammer presented in this paper are correct and feasible.
【作者单位】：清华大学水沙科学与水利水电工程国家重点实验室;吉林省水利水电勘测设计研究院;
【基金】：国家自然科学基金面上资助项目(51379099) 清华大学水沙科学与水利水电工程国家重点实验室开放基金资助项目(sklhse-2017-C-02)
【分类号】：TV134.1

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