低压条件下滴灌毛管水头损失试验研究

Head Loss Experimental Analysis of Trickle Irrigation under the Low Pressure

对孔径0．9、1．2mm，孔间距33cm，管径为Ф12、Ф16PE滴灌毛管进行了0．25～2．4m入口工作水头条件下的水力性能试验和分析。结果表明，在试验的工作水头下，使用达西一韦斯巴赫公式、经验公式计算出管道总水头损失值与实测值比较都有很大的偏差，通过对试验数据的回归分析，对常用的水头损失计算经验公式用以入口工作水头为变量的参数进行了修正，取得较好的计算精度。

Under the inlet working head range 0.25 m to 2.4 m, experiment carried with laterals which diameter are 12 mm and 16 mm respective, pitch in 0.9 mm and 1.2 mm, aperture in 33 cm. The result showed that there are great windage between measured value and calculated value which calculated by Dacy-weisbach formula and empirical formula, two of which are suitable to normal pressure drip irrigation system. Based on regression analysis of experimental data, did a modified to empirical formula with a parameter that related to inlet working head and got good calculation accuracy.