提高喷射冲击式洒水器的水力效率:孔径比与非撞击式喷洒器的比较分析

IF 4.4 1区 农林科学 Q1 AGRICULTURAL ENGINEERING
Zixin Wang , Yue Jiang , Hong Li , Lisha Wang
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引用次数: 0

摘要

设计了一种基于主喷嘴和副喷嘴之间不对称碰撞的喷射撞击喷头,以取代传统的旋转喷头,后者需要额外的配水装置才能在低压下提供合适的配水。研究重点是主喷嘴和副喷嘴之间的孔径比,并根据喷射动量推导出理论关系。通过将水力性能实验与高速摄影(HSP)实验相结合,阐明了造成喷射撞击喷头与非撞击喷头之间水力性能差异的因素。结果表明,开发的喷射撞击式喷灌机实现了更平滑的水流分布趋势。采用标准重要性与标准间相关性(CRITIC)方法对喷射撞击式喷灌机的润湿半径和克里斯琴森均匀系数进行了评估。对平均得分的比较表明,在全压条件下,孔径比为 1.66 的喷头性能最佳。相比之下,1.33 的孔径比在低压下表现更佳。喷射偏转角和喷射破裂长度是通过 HSP 实验获得的。测量和理论射流偏转角之间的相对误差小于 5%,证明了所提出的理论计算方法的可靠性。利用非线性曲线确定了孔径比、主喷嘴出口直径、射流破裂长度、平均测量射流偏转角、工作压力和润湿半径之间的关系。计算值和测量值之间的相对误差在 4% 以内,表明新公式适用于计算喷射撞击式喷头的润湿半径。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Enhancing hydraulic efficiency in jet impingement sprinklers: Comparative analysis of aperture ratios compared with non-impingement sprinklers
A jet impingement sprinkler was designed based on asymmetric collision between the primary and secondary jets to replace traditional rotating sprinklers that require additional water distribution devices to provide suitable water distribution at low pressures. The study focuses on the ratio of apertures between primary and secondary nozzles, deriving a theoretical relationship based on jet momentum. The factors contributing to the variation in hydraulic performance between jet-impingement and non-impinging sprinklers are elucidated by combining hydraulic performance experiments with experiments using high-speed photography (HSP). The results show that the developed jet impingement sprinkler achieved a smoother water distribution trend. The wetted radius and Christiansen's uniformity coefficient of the jet impingement sprinkler were evaluated using the Criteria Importance via the Intercriteria Correlation (CRITIC) method. A comparison of the average scores shows that an aperture ratio of 1.66 performs best under full pressure. By contrast, an aperture ratio of 1.33 exhibited superior performance at low pressure. Jet deflection angle and jet breakup length were obtained through HSP experiments. The relative error between the measured and theoretical jet deflection angles was less than 5%, demonstrating the reliability of the proposed theoretical calculation method. A non-linear curve was used to establish the relationship among the aperture ratio, diameter of the primary nozzle exit, jet breakup length, average measured jet deflection angle, working pressure, and wetted radius. The relative error between the calculated and measured values was within 4%, indicating the suitability of the new formula for calculating the wetted radius of jet impingement sprinklers.
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来源期刊
Biosystems Engineering
Biosystems Engineering 农林科学-农业工程
CiteScore
10.60
自引率
7.80%
发文量
239
审稿时长
53 days
期刊介绍: Biosystems Engineering publishes research in engineering and the physical sciences that represent advances in understanding or modelling of the performance of biological systems for sustainable developments in land use and the environment, agriculture and amenity, bioproduction processes and the food chain. The subject matter of the journal reflects the wide range and interdisciplinary nature of research in engineering for biological systems.
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