滴灌灌水器流道设计理论研究若干问题的综述

General Review on Several Fundamental Points of Design Theory about Flow Path in Drip Irrigation Emitters

灌水器是滴灌系统最关键的部件之一,其结构与水力性能的优劣对滴灌系统的灌水均匀性、抗堵塞能力以及寿命影响很大。在简要论述国内外滴灌灌水器流道发展现状的基础上,从灌水器流量压力关系、流道内流体流动机理、流道堵塞与防治三个方面详细阐述了灌水器流道设计理论的研究进展,最后提出了滴灌灌水器流道的发展趋势以及国内在灌水器流道设计理论研究中急需解决的问题。

The emitter is one of the key components in drip irrigation system, and its configuration and hydraulic performances make much effects on the irrigation uniformity, anti-clogging and using life-span of drip irrigation. The current situation of drip irrigation emitter was discussed at first, and then the design theories advances were expounded in particularly from three aspects of the relation between flux rate and pressure, the mechanism of liquid flow and the anti-clogging. In the end, the development direction of the flow urgently need to be solved in flow path design path in drip irrigation emitters, its problems that theory in China were pointed out.