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从水力方程求解及节点流量-压力关系率定两个方面梳理了低压供水管网水力分析研究进展。研究发现,当前成果尚不足以解决实际工程问题,并针对节点流量-压力关系指出有如下3点需要解决:(1)不同建筑及管网节点流量-压力曲线中额定压力及最低压力的率定;(2)不同建筑及管网中VDD与PDD卫生器具比例的确定;(3)包含不同比例VDD及PDD类型卫生器具的节点流量-压力曲线的率定,以及简化率定方法研究。针对上述问题,提出应用蒙特卡洛模拟对低压供水时建筑用水进行数值仿真。
The development of hydraulic analysis of low-pressure water supply pipe networks is reviewed from the aspects of hydraulic equation solving and nodal flow-pressure relationship determination. The study finds that the current results are not enough to solve practical engineering problems, and point out that there are 3 points that need to be solved in relation to the node flow-pressure relationship: (1) Rating pressure and minimum pressure in flow-pressure curves of different buildings and pipe network nodes. (2) Determination of the ratio of VDD and PDD sanitary appliances in different buildings and pipe networks; (3) Study on the determination of the nodal flow-pressure curve for various types of sanitary appliances with different ratios of VDD and PDD, and the study of simplified calibration methods. In response to the above problems, a Monte Carlo simulation was used to simulate the building water supply for low pressure water supply.