Theoretical and Experimental Study on Water Offset Flow in Fluidic Component of Fluidic Sprinklers
Theoretical and Experimental Study on Water Offset Flow in Fluidic Component of Fluidic Sprinklers
复制标题
射流喷头射流元件水补偿流动的理论与实验研究
DOI：
10.1061/(asce)ir.1943-4774.0000288
复制
发表时间：
2011-04
影响因子：
2.6
通讯作者：
Wang, Chao
中科院分区：
文献类型：
--
作者：
Li, Hong;Yuan, Shou-qi;Xiang, Qing-jiang;Wang, Chao
与其它旋转喷头相比，出口间隙控制射流喷头具有结构简单、水力性能好等优点。在喷洒器的流体部件中发生的偏移效应驱动喷洒器并控制其旋转方向。对喷头射流元件中的小射流偏置比（10PXH喷头为0.675，30PXH喷头为0.355）进行了理论和试验研究。解析解和其他计算推导出了偏置射流的再附着长度。计算流体动力学（CFD）软件分别在二维和三维中模拟流体部件的简化模型和真实的模型中的偏移流，利用流体体积（VOF）方法来追踪水和气体之间的界面的形状。对侧壁压力分布的模拟结果也得到了再附着长度。静压和再附着长度的实验测量结果与计算和模拟的预测结果一致。这些结果表明，CFD模拟可以近似流体元件中的偏移流动。在此基础上，确定了部分构件的尺寸。
Compared with other rotating sprinklers, the fluidic sprinkler controlled by an outlet clearance has a simpler structure and better hydraulic performance. The offset effect, happening in the fluidic component of the sprinkler, drives the sprinkler and controls its rotational direction. Theoretical and experimental research are conducted to study the water offset jets with a small ratio of 0.675 for the 10PXH sprinkler and 0.355 for the 30PXH sprinkler in the fluidic components. Analytic solutions and other calculations deduce the reattachment lengths of the offset jets. Computational fluid dynamics (CFD) software simulates the offset flows in simplified models and real models of the fluidic components, in two dimensions and three dimensions, respectively, utilizing the volume of fluid (VOF) method to trace the shape of the interface between water and gas. Simulation results of the sidewall pressure distribution also obtain the reattachment lengths. The resulting experimental measurements of the static pressure and reattachment length are in line with the predicted results of the calculations and the simulations. These results indicate that CFD simulation can approximate the offset flow in fluidic components. On the basis of this study, some of the component sizes are confirmed.
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影响因子：
3.7
作者：
R. Sawyer
通讯作者：
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DOI：
10.1016/j.ijheatfluidflow.2003.11.001
发表时间：
2004-02
影响因子：
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DOI：
10.1016/s0017-9310(99)00312-9
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2000-07-01
影响因子：
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