Hydraulic performance and energy dissipation effect of pit structure flow channel emitter

摘要: Abstract In this paper, a drip irrigation emitter with new pit flow channels such as shunt, sharp turn, and confluence was constructed by the structure in water transporting tracheid of bionic plant xylem. order to study hydraulic performance energy dissipation effect channel, geometric parameters channel were combined simulation prediction orthogonal test. The 25 sets test schemes carried out characteristics, Bernoulli equation used solve structural loss coefficient. At same time, results analyzed range variance, regression model index established. showed that 0.462~0.496, its good. coefficient under pressure head 5~25 m 2120~6321, which obvious. influence each parameter on regime T>B>S>D>A, optimal scheme T0.18B2.2S2.2D0.2A4. significant. value F statistic 16.670, corresponding significance level Sig.=0