基于两相流模拟的高抗堵滴灌灌水器开发方法

A development method for high anti-clogged drip emitters based on two-phase flow simulations

提出了一种基于两相流(水和固相物)数值模拟并结合快速原形/快速制模(RP/RT)技术的滴灌灌水器快速低成本开发方法,辅助新型灌水器设计与开发.对比传统的开发方法,该方法不仅保证了灌水器高的抗堵塞性能,而且其开发成本和周期均降低超过70%以上.灌水器内流场两相流模拟采用了分离相模型,不仅可视化了水流场微观特性,而且得出了固相物在灌水器内流场水流中的流动轨迹及固相物在灌水器中密度分布,为灌水器的结构优化提供了直接的依据.采用RP/RT制模制作实验样件,保证了样件材料与注塑产品的一致性,提高了定型精度.

Rapid low cost development approach was provided based on two-phase flow（water and solid） simulation integrated RP（rapid prototyping）/RT（rapid tooling） technology, assistant design and development of new type emitter, contract to traditional development method, not only guaranteed emitter the high anti-clogged performance, but also its development costs and the cycle are lower of over 70 %. A discrete phase turbulent model was used for emitter channel two-phase flow simulation,not only obtain the visualization of microscopic characteristics of the flow field, but also get the flow path of solid phase in the field of emitter and medium density distribution, it provides for a direct basis of structural optimization. Use RP/RT to produce experimental sample, guarantee the same sample material with injection molded products, it improves the accuracy of stereotypes.