Simulation study on influence of fork angle and turning radius on hydraulic performance of bidirectional channel emitter
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DOI:10.7606/j.issn.1000-7601.2024.01.28
Key Words: drip irrigation emitter  bidirectional flow channel  local head loss  numerical simulation  dimensional analysis
Author NameAffiliation
WANG Yalin College of Hydraulic & Environmental Engineering, China Three Gorges University, Yichang, Hubei 443000, China 
FU Jianping College of Hydraulic & Environmental Engineering, China Three Gorges University, Yichang, Hubei 443000, China 
LV Congcong College of Hydraulic & Environmental Engineering, China Three Gorges University, Yichang, Hubei 443000, China 
ZHONG Yun College of Hydraulic & Environmental Engineering, China Three Gorges University, Yichang, Hubei 443000, China 
ZHU Shijiang College of Hydraulic & Environmental Engineering, China Three Gorges University, Yichang, Hubei 443000, China 
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Abstract:
      In order to study the hydraulic performance of bidirectional channel emitter, its structural unit was taken as the research object, with two structural parameters, fork angle and turning radius were used as the influencing factors. The orthogonal experimental design method was used to design 16 kinds of structural parameter combination schemes. The flow state of the fluid inside the flow channel was simulated by the computational fluid dynamics software Ansysfluent, and the regression model of the flow channel structure parameters and the local head loss of the flow channel unit was established by dimensional analysis. The results showed that the local head loss was related to the fork angle, turning radius and flow velocity, the fork angle was negatively correlated with the local head loss, and the turning radius and flow velocity were positively correlated with local head loss. When the inlet flow velocity was fixed, the fork angle was 32.4° and the turning radius was 1.72 mm, the local loss of the runner unit was the largest. When 10 channel units were set, the flow index of the emitter with cross arrangement was better.