城镇供水管网瞬变流计算

为防止复杂供水管网出现有害水锤，需通过瞬变流数值计算来预测系统内由升压水泵的启停及管网内某些阀门的开闭所引起的压力波动，这些压力波动有时会引起爆管、震裂阀门等恶性事故。利用由特征线法建立的供水管网瞬变流计算数学模型，可预测管网运行中出现的有害水锤，并求得可能出现的最高（最低）压力，为设计者采取防护措施提供理论依据。

Calculation of Transient Flow in City's Water Distribution Network

In order to prevent against the occurrence of harmful water hammer in complex water distribution system,it is necessary to forecast the pressure fluctuation in the system caused by on / off of pressure-rising pump and opening /closing of some valves by way of transient flow calculation.The pressure fluctuation will sometimes result in the accidents such as pipe bursting and valve splitting.The mathematic model for transient flow calculation set up by characteristic method can be used to forecast the harmful water hammer occurring in operation of the system,and to find the possible occurrence of the maximum(minimum) pressure,so as to provide the theoretic basis for designer to adopt protection measures.