| 射流三通组合的水力性能试验研究 |
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| 作者单位： | ;1.江苏大学流体机械工程技术研究中心 |
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| 摘 要： | 【目的】探究支管射流三通与毛管射流三通组合下灌水系统的水力性能。【方法】根据3种支管射流三通进口压力水头(10、12、14 m)和3种滴灌带单侧铺设长度(60、70、80 m)设置9组试验,建立了射流三通水头振幅、脉冲频率、进口流量与水头损失的非线性拟合关系式,并分析了不同射流三通组合对灌水系统灌水均匀度的影响。【结果】水头振幅与水头损失、脉冲频率与水头损失均呈对数函数关系,流量与水头损失呈线性函数关系,且相对误差均小于1%;当支管毛管均采用射流三通时,灌水系统的灌水均匀系数提高了0.43%～0.92%,流量偏差率降低了5.32%～6.68%。【结论】可选择能够提高灌水均匀度的支管射流三通与毛管射流三通的最佳组合,并精确地预测3个模型下灌水系统水头损失的变化规律。
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| 关 键 词： | 射流三通 水头损失 进口流量 水头振幅 脉冲频率 灌水均匀性 |
Experimental Study on Hydraulic Performance of the Combination of Jet Tee |
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| Institution: | ,Reseurch Center of Fluid Machinery Engineering and Technology, Jiangsu University |
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| Abstract: | 【Objective】This paper aims study to the hydraulic performance of irrigation system under the combination of the branch jet tee and the lateral jet tee.【Method】Nine sets of experiments were set up according to the inlet heads of three kinds of branch jet tee inlet pressure(10 m, 12 m, 14 m) and three groups of drip irrigation tape single-side laying length(60 m, 70 m, 80 m) in this test. Three models of head loss and head amplitude, head loss and pulse frequency, head loss and inlet discharge were established through the analysis of experiments. And the effect of different combination of jet tee on the uniformity of drip irrigation was analyzed.【Result】The relationship between the head amplitude and head loss was logarithmic function. The relationship between pulse frequency and head loss was logarithmic function. The relationship between inlet discharge and head loss was linear function. Errors were less than 1%. When the combination of the branch jet tee and the lateral jet tee is used, the uniformity coefficient of drip irrigation of the irrigation system increased by 0.43%～0.92%, and the flow deviation rate decreased by 5.32%～6.68%.【Conclusion】The combination of the branch jet tee and the lateral jet tee can be selected to improve the uniformity of irrigation, and three models can be used to accurately predict changes in the hydraulic characteristics of the irrigation system. |
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| Keywords: | jet tee head loss inlet discharge head amplitude pulse frequency irrigation uniformity |
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