| 南水北调北京段输水系统水力瞬变的控制 |
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| 引用本文： | 杨开林,石维新. 南水北调北京段输水系统水力瞬变的控制[J]. 南水北调与水利科技（中英文）, 2005, 3(5): 1-5 |
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| 作者姓名： | 杨开林 石维新 |
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| 作者单位： | 1. 中国水利水电科学研究院,北京,100038
2. 北京水利规划设计研究院,北京,100044 |
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| 摘 要： | 根据北京段输水系统工程布置的特点,研究了事故断电条件下水力瞬变引起的液柱分离现象及其防止措施,提出了求解空气阀瞬变过程的新模型.研究表明,可以沿线布置空气阀和单向调压井防止瞬变液柱分离破坏.对沿管线间隔500 m～1 000 m布置空气阀的水力瞬变计算研究发现,过大或者过小的空气阀孔径都是不利的,存在一个抑制液柱分离冲击压力或者高度真空的最优的空气阀孔径.对采用单向调压井防止液柱分离的研究表明,沿线需要布置5座,并提出了合理的设置位置和经济参数.
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| 关 键 词： | 南水北调 北京段输水系统 水力瞬变 空气阀 单向调压井 |
| 文章编号： | 1672-1683（2005）05-0001-05 |
| 收稿时间： | 2005-05-23 |
| 修稿时间： | 2005-05-23 |
Control of Hydraulic Transients in Beijing Section of the Middle Route of South-to-North Water Project |
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| YANG Kai-lin,SHI Wei-xin. Control of Hydraulic Transients in Beijing Section of the Middle Route of South-to-North Water Project[J]. South-to-North Water Transfers and Water Science & Technology, 2005, 3(5): 1-5 |
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| Authors: | YANG Kai-lin SHI Wei-xin |
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| Affiliation: | YANG Kai-lin ,SHI Wei-xin ( 1.China Institute of Water Resources and Hydropower Research , Beijing 100038; 2 Beijing Institute of Planning |
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| Abstract: | Liquid-column separations in the pipeline of the Beijing Section in Middle Route of South-to-North Water Transfer caused by a power failure are investigated. A new model is presented for solution to the transients of air valves. The analysis indicates that there is an optimal value of the orifice diameter of air valves in control of hydraulic transients. If the air valves with 0. 1 meter of the orifice diameter are placed in every 500m or 1 000 m along the pipeline, the minimum water pressure may be controlled above minus 4. 5m head, which meets the designed requirement. It is also proved that the five single-direction surge tanks can be also used to prevent the pipeline from liquid-column separation. |
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| Keywords: | South-to-North Water Transfer Beijing Section Project hydraulic transient air valve single-direction surge tank |
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