Stereolithograp hy technology is adopted to fabricate t he integral st ruct ure of emit ters<br />and outer pipes

and t he experiment s of emit ter hydraulic performance are carried out wit h or2<br />t hogonal design met hod

where t he key parameter s of t riangle channel are distinguished. The re2<br />sult s obtained f rom range analysis and variance analysis show t hat t he channel t urning angle is t he<br />most important factor affecting the flow index

and t he flow rate is seriously influenced by t he<br />number of channel unit s

which facilitates set tling the problem of increscent flow rate due to t he<br />st ructural optimi-ation. A model is established between st ruct ural parameters and hydrodynamic<br />behavior s according to t he linear multivariable regression met hod

which is verified being able to<br />forecast the relationship between t he flow rate and pressure lo ss for t he emit ter s with t riangle<br />labyrint h channels.