Abstract:

Stereolithography technology was used to fabricate experimental samples of emitters, and the experiments of emitter hydraulic performance were carried out with uniform design method, where six key parameters of trapezoidal-channel emitter were distinguished. The discharge coefficient and the flow exponent were regressed respectively,the results show that power function model is more appropriate for the relationship between the discharge coefficient and six parameters,while the flow exponent can be well expressed by a second-order polynomial model,which are verified by the experimental data of another three groups emitters. The regression model appears to be a good empirical formula for the quantitative design of emitters’ discharges.

Key words: stereolithography;emitter;quantitative design;uniform design

摘要：

取梯形流道灌水器的6个关键参数为因素，采用均匀设计试验方法设计出18组灌水器结构，利用光固化成形技术快速制作出各参数组合的灌水器试验样件并进行水力性能测试。分别对流量系数和流态指数进行回归分析，结果表明流量系数与6个参数之间表现为幂函数关系，流态指数主要体现为6个参数之间的二次函数关系。通过另外设计4组灌水器结构并利用其实测数据对两回归模型进行验证，结果表明此模型能很好预测流量与压力之间的关系，研究结果为此类灌水器流量的定量设计提供了经验公式。

关键词: 光固化成形；灌水器；定量设计；均匀设计