Improvement of Flow Channel Structure for Single-Wing Labyrinth Emitter

Abstract

Abstract The anticlogging performance and clogging law of a single-wing labyrinth drip irrigation emitter were analyzed through hydraulic performance tests. On this basis, numerical calculation was carried out using computational fluid dynamics (CFD) technology, and the flow channel structure was improved. The results showed that there is a large flow dead zone in the flow channel structure of traditional single-wing labyrinth emitters, and the proportion of the low-flow-velocity area reaches 54.39% of the total trapezoidal flow channel area. The flow dead zone area of the improved bidirectional flow channel structure emitter is significantly reduced, and the proportion of the low flow velocity area is only 12.41% of the total flow channel area. Compared with the traditional single-wing labyrinth trapezoidal flow channel emitter, the proportion of the low flow velocity area decreased by 41.98%. Through optimizing the flow channel structure of the irrigation emitter, the average velocity within the flow channel increased by 110.2%, and the average concentration of particulate matter at the outlet increased by 77.7%. Compared with the traditional single-wing labyrinth flow channel structure, the bidirectional flow channel structure has a better sediment discharge capacity and anticlogging performance, and the concentration of particles at the outlet is significantly increased.