【摘要】 针对滴灌中贴壁式滴灌带的堵塞问题,通过室内试验在理论上研究不同水源泥沙浓度和进口压力下滴灌带细小流道抗堵塞水力学性能和消能情况。结果显示:迷宫式流道处于半紊流状态,具有较强的挟沙能力,消能充分。水源泥沙浓度小于100mg/L时,滴灌带几乎无堵塞,大于该值时,滴灌带开始堵塞。进水压力大,流量随之增大,滴头堵塞程度减小。更多还原

【Abstract】 A series of experiments about the effect of the sand clay content of water and entrance pressure on the properties in hydraulics of drip irrigation tape’s fine water-road resisting blockage in theory about the blockage problem were carried out in laboratory. The experiment result showed that water-road were on the half-turbulence condition and had higher transportation sand clay capability. Drip irrigation tape hardly blockage while the sand clay content of water was less than 100 mg/L. On the contrary, it began to block when the sand clay content of water was more than 100 mg/L. Its blockage degree decreased when the entrance pressure was great.更多还原