膜孔灌多向交汇入渗减渗特性和数学模型研究

利用自行研制的试验装置进行了膜孔入渗模拟试验。根据试验资料，分析了膜孔多向交汇入渗规律，研究了膜孔交汇入渗相对于膜孔自由入渗的减渗特性，建立了膜孔多向交汇入渗的三阶段入渗模型和减渗量模型，分析了膜孔交汇入渗参数随入渗阶段的变化规律，提出了膜孔交汇入渗减渗率的概念，并推导得到了膜孔多向交汇入渗减渗率的计算公式。在此基础上，建立了膜孔多向交汇入渗减渗率与入渗时间的幂函数关系，并根据试验实测资料进行了验证。

Infiltration reduction effect and mathematical model of bilateral interference infiltration in film hole irrigation

The infiltration characteristics of film-hole irrigation are studied by using the testing installation developed by the authors in laboratory. The law of bilateral interference infiltration and the infiltration reduction effect relative to free infiltration is analyzed according to the experimental data. A 3-phase model describing the infiltration and the model for calculating the infiltration reduction effect are established and the variations of filtration parameters in different phases are analyzed. The concept of reduction rate of bilateral interference infiltration is suggested and corresponding formula for calculating is proposed. It is found that the relationship between reduction rate and infiltration duration follows an exponential function law.