Abstract
In order to improve the performance of emitter, the extenics theory is introduced, whose divergent thinking is used to resolve the conflict of anti-clogging and energy dissipation and a new structure is proposed. The wide triangular areas are designed to reduce the flow rate behind of the each orifice and be easy to precipitation of impurities. The orifices are set to gradually decrease water kinetic energy and the flow channel is designed to be dismantle. The numerical simulation technology is used to analyze the internal flow field of emitter, the flow field results show that the improved emitter has great effect of energy dissipation and anti-clogging. As the same time, the structure of emitter is optimized and L1 = 31 mm, L2 = 21 mm, L3 = 8 mm and L4 = 5 mm are the optimization size values.
Highlights
The emitters are the key components of the drip irrigation system and are widely applied in greenhouses for green plant
Wu et al (2004) carried out an investigation on the subsurface drip irrigation system and they thought emitter clogging caused by the attached granules and proposed to optimize the channel structure to solve this problem
Wei et al (2008) adopted the numerical simulation and experiments, three types of emitters, including eddy drip-arrows, pre-depositing drippers and round-flow drip-tapes were evaluated by them, the results showed that the eddy drip-arrows have the best anti-clogging performance among three emitters
Summary
The emitters are the key components of the drip irrigation system and are widely applied in greenhouses for green plant. Jiang et al (2011) designed an emitter with pre-impact energy dissipation, pre-precipitation, labyrinth energy dissipation and analyzed by computer aided engineering technology, the results show that it is significant anticlogging performance From those investigations above, the researchers were confirmed that structure of emitter could influence the emitter clogging and the energy loss efficiency and need further design the new emitter products with anticlogging performance. The researchers were confirmed that structure of emitter could influence the emitter clogging and the energy loss efficiency and need further design the new emitter products with anticlogging performance In this design, lots of conflicts will be met; the conflicts solving tools will be used to resolve these conflicts.
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