供水管网试验模型的构建方法

Establishment of a water distribution network testing model

建立供水管网的试验模型,便于研究实际供水管网中的水力、水质问题。根据管流的变态水力模拟相似理论,建立了供水管网原型和试验模型主要参数间的关系,提出了构建供水管网试验模型的具体方法和步骤,并对某一供水管网进行了变态水力模拟。模拟结果表明,模型和原型的管道流量、流速、单位水头损失及水头损失的相对误差及其平均值均小于或等于0.01,且关联度均大于0.90,属一级精确等级,方法可靠。

A water distribution network testing model has been established for further investigation on the hydraulic feature and water quality of the water supplying system. On the basis of the theory of pipeline distorted hydraulic analogy, the dependency relation between main parameters of both the prototype network and this model was recognized and the specific method and procedures to establish a water distribution network testing model was proposed. An experiment of distorted hydraulic analogy for a practical pipeline was done. The results shown that the relative errors and correlation factors of the model to prototype are all equal or less than 0. 01 and greater than 0. 90 respectively. These are very precise and valid for main parameters including the flow rate, velocity, specific and absolute head losses in the pipe.