Influence of Emitter Structure on Its Hydraulic Performance Based on the Vortex

Cuncai Wang, Zhiqin Li and Juanjuan Ma
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Cuncai Wang: School of Water Resources Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, China
Zhiqin Li: School of Water Resources Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, China
Juanjuan Ma: School of Water Resources Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, China

Agriculture, 2021, vol. 11, issue 6, 1-12

Abstract: The rectangular labyrinth emitter is taken as the study object in this article, as we added internal teeth to vortex-free and vortex areas in its lateral channel or lengthened the vertical channel, to change the channel structure. Using the computational fluid dynamics (CFD) method simulates the water flow field, to get the relationship between flow rate and pressure, and the vortexes distribution in channel. The aim of this study is to explore the reasons for the influence of structural change on hydraulic performance of the emitter through the analysis of vortex intensity and its distribution from the perspective of the vortex. The results show that the relative error of simulated results and experimental data was 1.02–2.11%. Adding internal teeth to vortex-free areas in lateral channel can improve hydraulic performance of the emitter; adding them to vortex areas can reduce it. The increase in vortex number and intensity in flow field is the internal reason for the improvement of the emitter’s hydraulic performance. The channel structure changes promote the formation of a larger velocity gradient, and the increase in the velocity gradient in flow field exacerbates vortex formation. Changing channel structure to improve the emitter’s hydraulic performance can promote an increase in the number and intensity of vortexes in the channel.

Keywords: labyrinth emitter; channel structure; vortex; hydraulic performance; CFD simulation (search for similar items in EconPapers)
JEL-codes: Q1 Q10 Q11 Q12 Q13 Q14 Q15 Q16 Q17 Q18 (search for similar items in EconPapers)
Date: 2021
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (3)

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