不同坡度下压力对滴灌毛管均匀度的影响试验

以内镶式滴灌带和薄壁滴灌带为研究对象,测定了平坡、±0.5%坡度和±1%坡度时,不同入口压力下滴头沿毛管的流量分布和水力损失,并结合滴头的制造偏差,计算得出不同坡度和压力条件下滴灌毛管的均匀度。试验结果表明,将毛管铺设成恰当的顺流下坡坡度或提高入口压力均可提高毛管的滴灌均匀度。

Experimental study on effect of pressure on capillary tube uniformity in drip irrigation at different slopes

With the in-built drip irrigation belt and thin wall drip irrigation belt taken as examples,the flow rate distribution and hydraulic losses of drippers along capillary tubes at different inlet pressures were measured under the conditions of horizontal slope and slope gradients of ±0.5% and ±1%,then the uniformity of capillary tubes was calculated at different slope gradients and pressures in consideration of the manufacture deviation of drippers.Experimental result shows that the layout of the capillary tubes along the down slope at a rational gradient and increase of the inlet pressure are helpful to improve the uniformity of capillary tubes.