| 给水管网非恒定流动数值计算方法 |
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| 引用本文： | 马飞,曲世琳,吴一民.给水管网非恒定流动数值计算方法[J].北京科技大学学报,2009,31(4). |
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| 作者姓名： | 马飞 曲世琳 吴一民 |
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| 作者单位： | 1. 北京科技大学土木与环境工程学院,北京,100083
2. 北京联合大学机电学院,北京,100020 |
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| 基金项目： | 国家“十一五”科技支撑计划重大资助项目(No.2006BAJ03A06) |
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| 摘 要： | 为计算给水管网中非恒定流动运行工况,使系统可以快速平稳地完成工况转换,以非恒定流动理论为基础,分别利用重分阻尼系数法划分时间步长的特征线法和引入摩阻附加项的玻尔兹曼网格法计算给水管网非恒定流动的数学模型,并应用于某小区给水管网的非恒定流动工况分析中.结果表明,在管网非恒定流工况下,当Re≤7 000时利用玻尔兹曼网格法计算,否则利用特征线法计算将提高计算的准确性和计算效率.
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| 关 键 词： | 给水管网 非恒定流 特征线法 玻尔兹曼网格法 |
Numerical calculation methods of water distribution systems in hydraulic transient conditions |
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| MA Fei,QU Shi-lin,WU Yi-min.Numerical calculation methods of water distribution systems in hydraulic transient conditions[J].Journal of University of Science and Technology Beijing,2009,31(4). |
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| Authors: | MA Fei QU Shi-lin WU Yi-min |
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| Abstract: | Transient phenomena often happen in water distribution systems(WDS).In order to accelerate system transformation from unsteady state to steady state,two mathematical models were proposed based on the theory of transient flow,which are the method of characteristics(MOC) with re-divide damping coefficient and the lattice Boltzmann equation(LBE).These methods were used to calculate an example in WDS.It is shown that LBE is more accurate when Reynolds number is less than 7 000,otherwise MOC is more precise. |
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| Keywords: | water distribution system unsteady flow method of characteristics lattice Boltzmann equation |
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