基于二分法的微灌毛管水力设计

根据微灌毛管水力学特性,采用二分法搜索原理,并与逆递推法相结合,提出微灌毛管水力解析与设计方法。利用计算机编程从毛管末端向毛管进口逆序递推,可以快速、方便地求解出毛管各个孔口的压力和流量,设计毛管运行的水力参数,校核平均流量、流量偏差率等设计控制指标。实例验证结果表明,该设计方法具有直观、简便和快捷的特点,易为非专业人员理解与应用,具有较高的求解效率和计算精度。

Hydraulic design of micro-irrigation laterals based on bisection method

According to micro-irrigation hydraulics characteristic,combining the search principle of bisection algorithms and back step method,the lateral hydraulic analysis and design method of micro-irrigation were put forward.Using the computer program to calculate from the end to inlet of lateral,the pressure and discharge of each emitter on the lateral could be derived.The lateral running hydraulic parameter could be designed.The average discharge,discharge variation,and design control index could be checked very fast and conveniently.This method is intuitive,simple,efficient and easy for non-professionals to understand and use.Test results show that the method has a higher efficiency and the solution accuracy.laterals;micro-irrigation;bisection algorithms;reverse recursion;discharge variation