摘要
概述了近十年来,国内外压力补偿灌水器的应用情况及研究进展,在综合数值模拟、快速成型技术、可视化试验平台等多种先进技术手段的基础上提出了压力补偿灌水器比较完善的开发路线,并对该路线中涉及的关键问题进行了讨论。补偿机理的研究是压力补偿灌水器设计研发的核心,本文通过课题组已完成的部分工作,指出采用流固耦合方法进行数值模拟,获得灌水器内部压力速度分布及膜片变形情况,结合可视化试验是阐明压力补偿灌水器补偿原理、加快压力补偿灌水器研究的有效途径。
With superior hydraulic performance, the pressure compensating emitter (PCE) has extensive application in mountain and hill regions where the hydraulic pressure in irrigation systems often changes greatly. Because of the complicate structure, PCE design mechanism is still not clear. There' s a big difficulty in developing new types of PCE products even with high cost, which also makes it almost impossible to popularize PCE in China. The application and research status of PCE in both China and foreign countries was overviewed in order to supply a clear understanding to the readers. An improved development route for PCE was proposed on the base of combining several advanced techniques including numerical simulation, rapid prototyping (RP) and visualization experiment. Then the key problems involved in this route were discussed. And problems proposed in some early papers were solved. For the compensating mechanism is the key problem in PCE design and development, through part work of our team, it was pointed out that numerical simulation with fluid-structure interaction method, which provides us with pressure and velocity distribution, was an effective way to solve this problem.
出处
《农业机械学报》
EI
CAS
CSCD
北大核心
2014年第1期94-101,107,共9页
Transactions of the Chinese Society for Agricultural Machinery
基金
国家高技术研究发展计划(863计划)资助项目(2011AA100507-04)
关键词
压力补偿灌水器
滴灌系统
开发路线
流固耦合
Pressure compensating emitter Irrigation system Development route Fluid-structureinteraction