供水管网管道摩阻的灵敏度研究  

Pipe roughness sensitivity analysis for water supply network

作　　者：吴双利[1] 吕谋[1] 董深[1] 

机构地区：[1]青岛理工大学环境与市政工程学院,青岛266033

出　　处：《青岛理工大学学报》2013年第1期63-68,共6页Journal of Qingdao University of Technology

基　　金：国家自然科学基金资助项目(50878108);国家水体污染控制与治理科技重大专项资助(2009ZX07422-006;2009ZX07424-003)

摘　　要：以实验室管网仿真模拟试验平台为基础,模拟某城市管网拓扑结构,建立供水管网水力模型,采用多工况分析的方法,研究管道摩阻变化对节点水压的影响,并计算其灵敏度系数,发现小部分关键管道摩阻的灵敏度较大,对节点水压的变化起关键性作用,而其他管道摩阻的灵敏度较小,对节点水压的影响可以忽略;且发现管道摩阻的灵敏度系数值与其管中的水流流速大小成幂函数关系.为减少变量个数和工作量,缩短计算时间,提出只对关键管道摩阻进行校正,其他管道摩阻使用经验值的方法.A hydraulic model of water distribution system is used to describe the behaviors of a city water network, which is based on the laboratory simulation platform. The effect of pipe roughness change on the state of the water hydraulic model is analyzed. The conclusion is that the nodal pres- sure is more sensitive to only a few pipes＂ roughness, and is mostly determined by the roughness of these pipes, while the roughness of the other pipes has little impact. This paper also gets the con- clusion that the sensitive coefficients of the nodal pressure to the pipe roughness are power functions of the flow velocities in the pipes. Therefore the new approach is proposed, whieh estimates those pipes＂ roughness that has the large sensitivity coefficients, and sets the other pipes＇ roughness as those are determined by the experience.

关 键 词：模拟平台 管道摩阻 灵敏度 

分 类 号：TU991[建筑科学—市政工程]