Drip irrigation has become an application trend of water-saving irrigation technology due to its excellent water-use efficiency. However, the energy dissipation form of the commonly used labyrinth channel is relatively simple, and the corresponding energy dissipation mechanism research is inadequate. This article proposes a new kind of channel structure of drip irrigation emitters based on the structure of scalariform perforation plates in plant xylem vessels. We establish a total of 16 sets of orthogonal structure schemes. Using numerical simulation and physical experiments, the hydraulic performance and energy dissipation mechanism of the perforated drip irrigation emitters (PDIE) are studied. The results show that the flow index of PDIE is 0.4665–0.5266. The hydraulic performance of PDIE in the high-pressure zone is the best, and the flow index is 0.4665–0.5046. As the pressure increases, the velocity of the flow of the upper perforation increases rapidly, the flow ratio decreases, the flow index decreases, and the hydraulic performance improves. To further verify the energy dissipation mechanism, a lower flow ratio and a better hydraulic performance were obtained through appropriately expanding the upper part of the upper perforation inlet to the channel boundary. The research sheds new insights for optimizing the hydraulic performance of PDIE. Results reported here provide a theoretical basis for the structural design of drip irrigation emitters and the energy dissipation mechanism research.

中文翻译：

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多孔滴灌灌水器水力性能与耗能机理的仿真与验证

滴灌由于其优良的用水效率，已成为节水灌溉技术的应用趋势。但是，常用的迷宫通道的耗能形式较为简单，相应的耗能机理研究还不充分。提出了一种基于植物木质部容器中标尺孔板结构的新型滴灌喷头通道结构。我们总共建立了16套正交结构方案。通过数值模拟和物理实验，研究了多孔滴灌喷头（PDIE）的水力性能和能量耗散机理。结果表明，PDIE的流动指数为0.4665–0.5266。PDIE在高压区的水力性能最佳，流动指数为0.4665–0.5046。随着压力的增加，上孔眼的流动速度迅速增加，流量比减小，流量指数减小，并且水力性能提高。为了进一步验证能量耗散机理，通过将上部射孔入口的上部适当扩展到通道边界，可获得较低的流量比和更好的水力性能。该研究为优化PDIE的水力性能提供了新见识。本文报道的结果为滴灌滴头的结构设计和能量耗散机理研究提供了理论依据。液压性能提高。为了进一步验证能量耗散机理，通过将上部射孔入口的上部适当扩展到通道边界，可获得较低的流量比和更好的水力性能。该研究为优化PDIE的水力性能提供了新见识。本文报道的结果为滴灌滴头的结构设计和能量耗散机理研究提供了理论依据。液压性能提高。为了进一步验证能量耗散机理，通过将上部射孔入口的上部适当扩展到通道边界，可获得较低的流量比和更好的水力性能。该研究为优化PDIE的水力性能提供了新见识。本文报道的结果为滴灌滴头的结构设计和能量耗散机理研究提供了理论依据。