滴灌梯形迷宫滴头水力性能多目标优化

Abstract

Abstract: The proposal of drip irrigation technique to enhance irrigation efficiency is the key problem for sustainable development of agriculture, but it is very challenging because of the inherent fluctuations of the hydraulic performance of drip emitter (HPDE). Flux coefficient and flow index are the two critical factors attributing to the hydraulic performance of drip emitter. A lot of researches have carried out study on the hydraulic performance of drip emitter only based on single objective optimization of HPDE, however, simultaneous optimization solutions on the multiple characteristic performance indices (MCPI) and the corresponding effects on HPDE still remain underexplored. Based on MCPI, HPDE with labyrinth channels was optimized by combining the Taguchi method and fuzzy logic. The analysis results of variance for MCPI show that factors including width, depth, angles and unit numbers had significant effects on MCPI, accounting for over 85% of total variations of MCPI. The optimal factor combination can be determined as W₁L₁D₃θ₂N₃. Compared with the 1st time optimized result, MCPI of the optimal condition was improved by 8.04%, meanwhile, the flux coefficient of 0.128 and flow index of 0.506 were improved by 7.91% and 6.75%, respectively. Finally, the experimental tests based on factor combination of W₁L₁D₃θ₂N₃ was conducted to investigate the optimal mechanism, which showed that the flux coefficient was 0.126 and the flow index was 0.504, indicating that MCPI was a promising processing method for HPDE.

Key words: drip irrigation, hydraulic performance, Taguchi method, fuzzy logic, multi output optimization

CLC Number:

TP183

LIU Chun-jing, TANG Dun-bing, WANG Lei, ZHAO Ze. Multi output optimization of the hydraulic performance for drip irrigation trapezoidal labyrinth channel of emitter[J]., 2016, 39(3): 600-606.

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Multi output optimization of the hydraulic performance for drip irrigation trapezoidal labyrinth channel of emitter

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