多孔膜袋水力特性研究  

Study on Pressure Distribution of Porous Membrane Bag

作　　者：张泽中[1] 王国辉[1] 王盈盈[1] 齐青青[1] 李彦彬[1] 

机构地区：[1]华北水利水电大学,郑州450045

出　　处：《湖北农业科学》2017年第14期2749-2753,共5页Hubei Agricultural Sciences

基　　金：华北水利水电大学青年人才计划项目(70500);河南省科技攻关计划专项(122102110050)

摘　　要：多孔膜袋技术是一种新提出的灌溉技术,可以减少棵间蒸发和深层渗漏,其压力分布情况是研究多孔膜袋水力问题的重要内容,直接影响多孔膜袋的出流均匀度。根据水力学基本原理建立多孔膜袋压力分布的数学模型,并对其相关系数进行分析。由能量守恒定律推求出多孔膜袋任一点处压强的计算公式,通过比较计算值与实测值可以认为计算值符合试验结果;用微元法推导了多孔膜袋沿程水头损失计算公式,通过比较实测值与计算值可以看出其变化趋势完全一致。The porous membrane bag technology is a new irrigation technology, which can reduce evaporation between tree and deep percolation, the pressure distribution of porous membrane bag is an important part of hydraulic problems＇ which directlyaffect the porous film bag outflow uniformity. According to the basic principles of hydraulics ＇ this paper established the mathematical model with porous film bag’s pressure distribution,and analyzed the correlation coefficient. Deriving the formula of the porous membrane bag pressure at any point with energy conservation law,compared with the calculated and measured values, it could be considered as the calculated values in accordance with the experimentation. Deriving the head loss fornula of the porous membrane bag with infinitesimal method, through the comparison between measured and calculated values, it can be seen that the change tend to be more consistent.

关 键 词：沿程出流 多孔膜袋 压力分布 

分 类 号：S275[农业科学—农业水土工程]