滴灌灌水器迷宫流道结构与水力性能实验研究

在对迷宫流道结构特征参数提取的基础上,应用快速成形制造技术制作一体化灌水器实验原型,进行了灌水器水力性能实验.应用多元线性回归拟合出了压力-流量关系式和回归曲线图,提出以梯形单元为主特征的流量与结构特征参数关系公式,通过实验验证了其可行性和准确性,建立了此种流道流量-压力-结构之间的关系,进一步分析了流道制造偏差对灌水器流量的影响,为迷宫型灌水器参数化结构设计和制造中的精度控制提供了理论依据.

Structure and Hydraulic Performance Experimental Research on Labyrinth Channels of Drip Irrigation Emitters

On the basis of picking up the structural feature parameters of labyrinth channels of drip irrigation emitters, the hydraulics performance experiments on integral labyrinth emitters were performed in order to summarize the design principle for labyrinth channels. The integral labyrinth emitters were made by means of utilizing rapid prototyping technique. Using multivariable linear regression, formulas of pressure versus flow and regression plots for different emitters were induced. The formulas of flow versus structural feature parameters were summarized based on the trapezoid unit, and those regression formulas were verified through experiments. The relationships among flow, pressure and cross-section dimension of this labyrinth channel were established. Furthermore, the effect of channel fabrication error on the flow rate of emitters was analyzed, which provided a basis for parameterized structural design and precision control in the fabrication of emitters.