节水灌溉供水系统瞬间过程水力特性及分析

针对节水灌溉供水系统在供水的起始和终了瞬间,系统内会出现具有瞬变流动特征的压头和流量变化,给正常灌溉带来不利影响甚至发生事故这一现象,通过对瞬间过程水力特性的试验研究和分析,给出了一定条件下供水系统瞬间过程的流量压头特性,分析了产生原因和主要影响因素,并提出了简单可行的控制方法。该法可供节水灌溉供水系统设计和运行时参考,类似的供水系统设计和运用时也可借鉴。

Hydraulic Characteristic of the Water-saving Irrigating and Supplying System''''s Transicent Process

The water-saving irrigating and supplying system supplys sufficient,constant pressure and qualified water for different fashioned irrigation equipment.At the initial and the end of supplying,the internal of the system has pressure with transient flow characteristics and discharge variation,which has adverse influence on normal irrigation,even induces accident.Through experiment and analyses,this paper gives the character of dicharge and pressure,analyses the reason and the main influencing factor,and put forward simple but feasible control method.All of these can supply references for designing and running of the water-saving irrigating and supplying system as well as the similar water-supplying system.