| 城市排水管网明满交替非恒定流数学模型的研究 |
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| 引用本文： | 柳园园,王船海,吴朱昊,曾贤敏,马腾飞,陈景波,许强.城市排水管网明满交替非恒定流数学模型的研究[J].水动力学研究与进展(A辑),2016(2):210-219. |
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| 作者姓名： | 柳园园 王船海 吴朱昊 曾贤敏 马腾飞 陈景波 许强 |
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| 作者单位： | 1. 河海大学水文水资源与水利工程科学国家重点实验室,南京210098;河海大学水文水资源学院,南京210098;2. 上海市政工程设计研究总院(集团)有限公司,上海,200092 |
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| 基金项目： | 水利部公益性行业科研专项(201301075)，国家水体污染控制与治理科技重大专项(2014ZX07101-011)Supported by the Ministry of Water Resource Special Funds for Scientific Research on Public Welfare(201301075)，the State Major Project of Water Pollution Control and Management(2014ZX07101-011) |
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| 摘 要： | 该文针对城市排水管网系统存在的明满流共存的计算难点,从一维水流的圣维南方程组的物理意义入手,推导了适用于有压管流的方程组表达形式,提出了当量宽度的概念和计算方法,修正了Preissmann窄缝假定方法中的窄缝宽度公式,将明渠和有压管道两种情况下的方程组写成统一的形式,实现了对明满过渡流的有效数值模拟。通过数学模拟,与经验数据和SWMM模型的对比验证,揭示了当量宽度法的合理性、可行性及其实际应用价值。
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| 关 键 词： | 当量宽度 Preissmann窄缝 明满过渡流 城市排水管网 数值模拟 |
Study on free-surface-pressurized flow mathematical model for urban drainage networks |
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| Abstract: | The hydraulic calculation of pipe network system,on which open channel flow and pressure conduit flow exist is a difficulty.In this paper,a general form of the Saint Venant equations is derived.A new method "the equivalent width",which is similar to Preissmann slot assumption in some ways,has been put forward.It is deduced to revise the width formula of Preissmann slot.The model for pressure flow and free surface flow in the drainage networks is built by the uniform governing equations and Preissmann fictitious slot.Through mathematical modeling,comparing with empirical data and SWMM model,the results show that the scheme is feasible and availabe. |
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| Keywords: | equivalent width preissmann slot free-surface-pressurized flow urban drainage networks numerical simulation |
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