| Cite this article: | 张军,李琳.流道参数对新型根灌器水力性能的影响及优化[J].灌溉排水学报,0,():-. |
| ZHANG Jun,LI Lin.流道参数对新型根灌器水力性能的影响及优化[J].灌溉排水学报,0,():-. |
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| Influence and optimization of flow channel parameters on new type root emitter hydraulic performance |
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ZHANG Jun1,2,3,2,4,2, LI Lin1
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1.College of Hydraulic and Civil Engineering,Xinjiang Agricultural University;2.China;3.Xinjiang Institute of Technology;4.Xinjiang Key Laboratory of Hydraulic Engineering Security and Water Disasters Prevention
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| Abstract: |
| 【Objective】The study is to discuss the influence of new type fruit tree root emitter spiral hedge flow channel parameter on hydraulic performance , which will provide a theoretical basis for the application of the root irrigation technology.【Method】Using the single factor and response surface test methods, to study the main influencing factors of the helical hedge flow channel and their effects on the variation coefficient of design flow Cq, establish and verify regression model of Cq during the different pressure intervals, and to optimize the flow channel parameters with the minimum Cq as the optimization objective in different pressure intervals.【Result】Main parameters of changing Cq are flow channel width b , the shunt Angle α and number of flow channel units n, The effects of the straight section length l1, the bend radius r and the convergence section length l2 on Cq are negligible. α, b and n have interactive effects on Cq, Cq is decreasing and then increasing with the increase of α, b and n and response surfaces have minimal values. Cq and α、b、n between low-pressure and high-pressure zones obviously are quadratic function relationship, secondary regression model multiple correlation coefficients (R2) respectively 0.9967、0.9971, and the difference between the adjusted correlation coefficients (Adj R2) is less than 0.2. The Cq of the optimal solution for the high-pressure zone is smaller than that of the low-pressure zone, and The relative errors between the predicted and measured values of Cq for the two pressure zones are 2.8% and 2.3%, respectively.【Conclusion】The Precision of the prediction of the coefficient of variation of the design flow with the regression model of Cq is reliable, and the spiral hedge flow channel is better than the low pressure area for irrigation, and the results of Cq optimization are reliable. |
| Key words: root emitter for fruit trees; spiral hedge flow channel; geometrical parameter; hydraulic performance; response surface method |
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