配水管网压力与漏水量关系试验研究

建立配水管网系统漏水量与压力之间的关系模型,指出漏水量与压力成指数关系,且指数在区间[0.5,1.5]。该模型将配水管网系统的漏水分为两部分,一部分的漏口面积恒定不变,可用孔口流量方程描述其关系;另一部分的漏口面积随压力变化,关系相对复杂。检验了模型推导以及假设的可行性,并拟合得到模型参数。采集实际配水管网系统的漏水量和压力观测数据,与建立的漏水量与压力之间的关系模型相比较,可提出配水管网系统减漏的最有效方法。

A model for pressure-dependent leakage in water distribution network

Based on the theoretical analysis and enough experimental data, a non-linear formula deals with the leakage flow to the pipeline pressure with the power of [0.5, 1.5]was established. This model is a two-part equation. The first term deals with flows from leakage paths, which can not expand as a function of pressure, and the relationship is described by using the conventional flow equation. The second term is the expanding area term, which is entirely dependent on actual pressure. And the relationship is relatively more complicated than the first term. Experimental data were used to verify the feasibility of deduction and assumption. The parameters of model were acquired by fitting the observed data. The best method to reduce leakage flow can be put forward by comparing the observed data with the model.