• CN: 11-2187/TH
  • ISSN: 0577-6686

›› 2007, Vol. 43 ›› Issue (7): 109-114.

• Article • Previous Articles     Next Articles

EFFECTS OF FRACTAL FLOW PATH DESIGNING AND ITS PARAMETERS ON EMITTER HYDRAULIC PERFORMANCE

LI Yunkai;YANG Peiling;REN Shumei;LEI Xianlong;WU Xianbin;GUAN Xiaoyan   

  1. College of Hydraulic and Civil Engineering, China Agricultural University
  • Published:2007-07-15

Abstract: Make use of the function of fractal geometry for constructing the anomalous bodies, which is introduced into the design of flow path. The fractal curves are used to form the flow path of drip irrigation emitter more complex than labyrinth, and the full design ideas of fractal flow path are pointed out. The results of experiment indicate that the emitter exponent of fractal flow path are lower than labyrinth emitters. The path analysis results show that the section area and length of the flow path are the main factor affecting on the flux coefficient of drip irrigation emitter, and other ones less. The relativity among flux coefficient, section area and length of the flow path could come to the level of salience. The exponent of emitter is independent with the parameters of the flow path, and the design of full turbulent emitter had been realized indeed. Based on this, a new method for design of flow path is pointed out.

Key words: Drip irrigation emitter, Fractal flow path, Hydraulic performance, Path analysis, Support vector machine, chaotic advection, electromagnetic stirring, Kolmogorov entropy, rare-earth, semisolid aluminum alloy

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