数字农科院2.0

Research on the pulsed spraying characteristics of non-rotating deflector sprinklers

文献类型： 外文期刊

作者： Li, Peng;Wang, Xinkun;Wu, Wenjing;Yang, Fan;Yuan, Weiwei

作者机构：

关键词： Non-rotating deflector sprinkler;Jet three-way device;Pulsed water pressure;Steady water pressure;Hydraulic performance

期刊名称： FLOW MEASUREMENT AND INSTRUMENTATION

ISSN： 0955-5986

年卷期： 2026 年 108 卷

页码：

收录情况： SCIE（2025版） ; ; EI（2025版）

摘要： Pulsed water pressure generated by a jet three-way device was employed to drive a non-rotating deflector sprinkler for pulsed spraying, aiming to alleviate such issues as poor jet breakup, excessive application rates, and water concentration at the end of the throw at low operating pressures. Comparative experiments were conducted between pulsed water pressure and steady water pressure spraying. Flow rate, throw radius, and water distribution were measured at pressures ranging from 50 kPa to 200 kPa, and application rate and irrigation uniformity were calculated. The results showed that for both pulsed and steady water pressure, the water distribution followed a triangular pattern with the highest volume near the end of the throw. However, under pulsed pressure, the base width of the triangle was approximately twice that under steady pressure, while its height was about half, indicating a pronounced peak-shaving and valley-filling effect. Compared with steady spraying, pulsed spraying reduced flow rate by 4.2 %-9.3 %; increased throw by 0.5 %-11.4 % at medium and low pressures (but decreased it by 3.3 % at high pressure); reduced the maximum application rate by 42.3 %- 47.6 % and the average application rate by 35.8 %-53.4 %; and improved the Christiansen uniformity coefficient by 0.7 %-23.2 %. These findings demonstrate that the pulsed water pressure generated by the jet three-way device significantly improves water distribution and shows strong potential for further development.

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