Advanced Methods to Develop Drip Emitters with New Channel Types

摘要: Because of their micro-scale and complex structure, the development cost new drip emitters is high. To reduce the cost, some advanced technologies, such as computer-aided design (CAD), computational fluid dynamics (CFD), rapid prototyping (RP) rapid tooling (RT) were used to establish a method for emitter development. The channel was designed using three-dimensional parameterized CAD model. Then flow within channel was simulated using CFD, which provided visual results pressure velocity distributions. Moreover, discharge exponent the emitter also obtained from CFD simulations. Verified by simulation results, several types were fabricated RP/RT without making an experimental steel mold or amplifying models. Using these prototype emitters, performance experiments structural finalization done directly. Results showed that deviations between measured discharges less than 5%. comprehensive analysis and measured one with optimum manufactured. measured performance plastic fabricated close simulations prototype tests, which indicating successful volume production. Taking eddy-channel developed here an example, comparative both time reduced 50%.