| 有压管道充水过程数值模拟 |
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| 引用本文： | 杨敏,李强,李琳,郑杨.有压管道充水过程数值模拟[J].水利学报,2007,38(2):171-175. |
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| 作者姓名： | 杨敏 李强 李琳 郑杨 |
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| 作者单位： | 天津大学,建筑工程学院,天津,300072 |
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| 基金项目： | 国家自然科学基金;新世纪优秀人才支持计划 |
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| 摘 要： | 基于明渠非恒定流的运动方程和连续方程，采用Preissmann四点隐式差分格式，结合虚拟流量法，对有压管道充水过渡过程进行了数值仿真模拟，该充水数学模型能模拟管道从无水变为无压流，再过渡到有压流的整个水流运动过程，其中包括漫流和明满过渡流。将该模型应用于南水北调天津干线有压输水系统充水仿真计算了充水过程中出现的水力过渡现象，最不利的情况出现在已经充满后的波动阶段，结果可为具体工程的充水操作预测水锤、规避风险和加强防护提供科学的依据。
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| 关 键 词： | 充水 数值模拟 Preissmann隐式差分法 明满流 |
| 文章编号： | 0559-9350（2007）02-0171-05 |
| 收稿时间： | 2006-07-13 |
| 修稿时间： | 07 13 2006 12:00AM |
Numerical simulation of water filling process in pressure conduit |
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| YANG Min.Numerical simulation of water filling process in pressure conduit[J].Journal of Hydraulic Engineering,2007,38(2):171-175. |
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| Authors: | YANG Min |
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| Affiliation: | Tianjin University, Tianjin 300072, China |
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| Abstract: | A mathematical model for describing the water-filling process based on Preissmann implicit difference method and virtue discharge method is established. The whole process including the changing from initial empty state to free surface flow and the transition from free surface flow to pressurized flow can be analyzed. The model is applied to numerically calculate the water-filling process in the main line conduit of South-to-North Water Transfer Project in Tianjin. It is found that disadvantage phenomenon will occur to the pressure fluctuating period during the conduit is changing from free surface flow to pressurized flow. |
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| Keywords: | water-filling of conduit numerical simulation Preissmann implicit difference method transition from free surface flow to pressurized flow |
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