| Abstrakt: |
In order to study the influence of the position of the inner tooth on the hydraulic performance and anti-clogging performance of the toothed bidirectional flow channel emitter, a toothed bidirectional flow channel emitter with superior hydraulic performance and anti-clogging performance was proposed by synchronous optimization. The computational fluid dynamics software Fluent was used to numerically simulate the emitters of five different toothed bidirectional flow channels (including the improved flow channel structure). The flow index, flow velocity, turbulent kinetic energy, turbulent kinetic energy dissipation rate distribution law and physical particle motion trajectory of different toothed bidirectional flow channels were analyzed. The results show that when the inner tooth is located on the inlet of the branch channel, the flow index of the emitter is the smallest, and the area of the turbulent kinetic energy dissipation rate of 2 000~4 000 m²/s² is larger than that of the other three schemes. By comparing and analyzing the minimum turbulent kinetic energy, sand migration distance, and sand retention time of the four schemes, it is concluded that when the inner tooth of scheme 1 is located on the inlet of the branch channel, the anti-clogging performance of the toothed bidirectional channel is the best. The streamline optimization of the inner tooth structure of scheme 1 is improved, which further improves the hydraulic performance and anti-clogging performance of the toothed bidirectional flow channel. [ABSTRACT FROM AUTHOR] |
