To provide a theoretical basis for the optimization of flow channel,an experiment on the influence of channel structure parameters of inner drip emitter on hydraulic performance was carried out in this paper.Taking 6 drip tapes which are commonly used in water-saving irrigation projects as the major researched tape,the author measured the 7 main structural parameters of the emitter channel by UG and Space claim software and then applied the Principal Component Analysis(PCA)method to rank these parameters.The relationship between the flow rate and the structure parameters of the inner drip emitter was studied through a pressure flow rate experiment under the work pressure of 0.02～0.15 MPa and an anti-clogging experiment with sand content of 5 and 15 g/L under the work pressure of 0.1 MPa.The results show that the influence of each structural parameter is:tooth spacing>the flow channel width>the arc length of the teeth>the flow channel depth>teeth height>the flow channel circumference>teeth number,of which the influence of tooth spacing is the first.From the pressure flow rate experiment,the hydraulic performance of NO.2 drip tape is better than others with smaller changes in flow rate and structural parameters.The result of the anti-clogging test sand rate under 5 g/L shows that the relative flow rate is positively correlated with the flow channel area and the teeth arc length,while is negatively correlated with the tooth spacing.In conclusion,the tooth spacing,the arc length of the teeth,and the flow channel area are the three crucial parameters influencing the performance of drip emitters and play a positive role in the designation and production of drip emitters.
NETL
NSTL
维普
万方数据
