环状喷灌系统水力解析的数值方法

Hydraulic Analysis Method of Looped Sprinkler Network

分析了环状喷灌系统中存在的节点流量连续性方程、管段压降方程和节点流量压力方程等水力学关系式,建立了环状喷灌系统水力解析的方程组,并提出了方程组切实可行的数值求解方法,编制了相应的计算机程序。通过算例,验证了该算法的正确性。根据对计算结果的分析,评价了算例系统的优缺点,并提出了合理的改进建议。

Looped sprinkler network is one of the important kinds of sprinkler irrigation systems. A new hydraulic analysis method used to determine flow rates, velocities and nodal heads of looped sprinkler network was proposed. The method was based on the energy balance equation, Hazen-Williams equation and nodal flow-pressure equation. The details including the mathematical model and the numerical simulation method were given. Numerical example demonstrated that the analytical procedure was simple and accurate. The method can be used to analyze not only looped sprinkler network, but also other complicated sprinkler irrigation system.