三级流道结构滴灌带的水力性能试验

Simulative experiment of clogging performance of the drip irrigation tape with three-stage path

该试验测定了两种三级流道结构滴灌带压力-流量关系和出水口流量偏差系数,并采用模拟堵塞方法对各级流道堵塞情况下出水口流量变化进行观测,试验表明:相同的流道断面,不同的流道结构对出水口流量和流态指数产生较大的影响;当某一级流道堵塞时,全程贯通式多级流道具有明显的流量互补效果;第I级流道堵塞影响范围较大、出水口流量减少率较高。

The relationship between pressure and discharge in multi-stage path drip irrigation tape and the deviation parameters of the outlet discharge are tested. At the same time discharge variety from outlets under the circumstance of clogging by means of the simulation method were researched. The experimental results showed that the same path section with different path constructions had an effect on flow status index. But that did not affect the deviation parameters. The whole straightway multi stage path had an obvious complement effect on flow discharge when clogging happened in some stage paths, and the impact range of the first stage path introduced is bigger, the reduction ratio of the outlet discharge is higher.