摘要
依据水力相似原理,提出了构建与实际压力供水管网等效的变态物理模型的理论方法.在物理模型与管网原型变态几何相似的前提下,结合欧拉变态相似准则和管段水头损失公式,得到压力供水管网与其变态模型的主要物理指标之间的关系.同时进行管段实验,考察了管段原型与变态模型的运行工况,理论与实验结果间的平均相对误差为9.8%.运用管网模拟软件EPANET建立了华北某区域实际管网的变态物理模型,结果表明,管网原型与物理模型的对应管道流速和对应节点水头的平均相对误差分别为3.05%及0.053%.证明了物理模型构建理论的正确性和可行性.
According to hydraulic similarity theory, a theory method for construction of distorted physical models of water distribution system was established. On the premise of distorted geometric similarity, Euler distorted similarity principle and formula for head loss were combined to deduce the relationship of principal physical indicators between water distribution system and distorted physical models. The distorted models of pipes were made to testify the constructing theory in laboratory, and the average relative error between the theory and the experiment is 9.8%. The distorted physical model of the water distribution system in certain area of Huabei was established by EPANET software, and the average relative errors of velocity and head loss between the water distribution system and its distorted physical model are 3.05% and 0.053%, which proves the constructing theory of physical models correct and practical.
出处
《天津大学学报》
EI
CAS
CSCD
北大核心
2008年第7期859-863,共5页
Journal of Tianjin University(Science and Technology)
基金
国家自然科学基金资助项目(50578108)
天津市科技创新专项资金资助项目(06FZZDSH00900)
关键词
供水管网
物理模型
变态模拟
相似理论
water distribution system
physical model
distorted simulation
similarity theory
