喷灌水量分布动态模拟与均匀性研究  

Dynamic Simulation for Sprinkler Irrigation Water Distribution with Uniformity

作　　者：韩文霆[1,2] 王玄[1] 孙瑜[1] 

机构地区：[1]西北农林科技大学机械与电子工程学院,陕西杨凌712100 [2]西北农林科技大学中国旱区节水农业研究院,陕西杨凌712100

出　　处：《农业机械学报》2014年第11期159-164,200,共7页Transactions of the Chinese Society for Agricultural Machinery

基　　金：'十二五'国家科技支撑计划资助项目(2011BAD29B08);新世纪优秀人才支持计划资助项目(NCET-12-0473)

摘　　要：为研究压力、喷头组合方式和插值方法对喷灌均匀系数CU和分布均匀系数DU这两个评价指标计算结果的影响规律，利用雨量筒径向间隔为lm的FY RB-471型喷头无风喷洒试验数据，模拟出了喷头在不同压力下的水量分布情况。在喷头矩形组合方式和正三角形组合方式下，采用线性插值、立方插值、三次样条插值、距离插值和平面插值法计算了不同压力下的喷灌均匀系数和分布均匀系数。结果表明，采用三角形组合方式比矩形组合方式计算的喷灌均匀系数CU高1．56～4．77个百分点，同样，三角形组合方式比矩形组合方式计算的分布均匀系数DU高4．26～9．19个百分点；不同的插值方法对喷灌均匀系数与分布均匀系数的计算结果影响不明显，而压力是影响喷灌均匀系数的一个重要因素。Distribution uniformity （DU） and Christiansen uniformity coefficient （CU） are two important indicators for evaluating the hydrodynamic performance and irrigationg quality of sprinkler irrigation system. In order to research the impact of the pressure, sprinkler combinations and interpolation methods on the distribution uniformity and Christiansen uniformity coefficient, CU and DU were computed by linear interpolation, cubic interpolation, cubic spline twice interpolation, inverse distance weighting method and plane interpolation method with two combinations （rectangular and regular triangle） , and 1 m sampling space. Using the experimental data of FY RB -471 sprinklers without wind simulated the water distribution under different pressures. The results showed that CU calculated form rectangular combination date were less than form regular triangle combination date by 1.56% -4.77%. Similarly, DU calculated form rectangular combination date were less than form regular triangle combination date by 4.26% -9. 19%. Different interpolation methods for the calculation results of CU and DU are not obvious, while the pressure is an important factor for affecting the sprinkler uniformity.

关 键 词：喷灌 喷头 均匀系数 水量分布 动态模拟 

分 类 号：S275.5[农业科学—农业水土工程]