微孔渗灌管水力特性的试验研究

Flow Hydraulic Characteristics of the Porous Pipe Buried in the Ground

通过试验实测的方法,对埋入地下的微孔渗灌管灌水时管路的水力特性进行了研究。结果表明,随着进水口压力、管长和微孔渗灌管透水性能的增加,微孔渗灌管水流量、沿程的水头损失和水力偏差率增大,且水头损失主要发生在微孔渗灌管靠近进水口的前半段。实际设计管网时,应综合考虑供水压力、渗灌管透水性能对水头损失的影响,确定管网中毛管的长度,保证灌水均匀度。

In this paper, flow hydraulic characteristics of the porous pipe buried in the ground were studied through the experiments. The results show that the porous pipe quantity, head loss and hydraulic deviation rate of the porous pipe would increase while water head in entrance, pipe length and porous pipe permeability increasing. The head loss mainly concentrated on the top half of the porous pipe. When design the network of subsurface irrigation, in order to enhance irrigation uniformity, choosing the lateral tube length should synthetically think over the water supplied pressure and porous pipe permeability how to affect the head loss.