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| DOI：10.13522/j.cnki.ggps.20190089 |
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| Experimental Study on Hydraulic Performance of the Combination of Jet Tee |
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ZHANG Chenxi, WANG Xinkun, XIAO Siqiang, FAN Erdong, XU Shengrong, WANG Xuan, XUE Zilong
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Reseurch Center of Fluid Machinery Engineering and Technology, Jiangsu University, Zhenjiang 212013, China
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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. |
| Key words: jet tee; head loss; inlet discharge; head amplitude; pulse frequency; irrigation uniformity |
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