Design Method for Chemical Clogging Emitters Boundary Optimization

摘要

Fractal flow channel structure as research object, based on chemical clogging condition of the physical model. It was analyzed using computational fluid dynamics (CFD) simulation and reveals the fractal flow channel internal flow characteristics of water and sediment. Fractal flow channel non-energy dissipation of the arc angle design optimization. Using standard k-s turbulence model and the DPM model, calculated: (1) As for the hydraulic performance analysis, before optimization emitter flow exponent of 0.487. 0.489 after optimization; From the inner flow field analysis, When the pressure head from 5 m to 15 m, before optimization emitter maximum flow rate from 2.09 m/s to 3.70 m/s, the maximum flow rate to optimize the emitter from 2.15 m/s to 3.81 m/s, the maximum optimization of flow rates were increased compared to the previous 2.87%, 3.34%, 2.97%, the flow rate improved. After optimizing the eddy region, the velocity of the outer edge of the eddy region increased from (0.005-0.752 m/s) to (0.311-0.930 m/s), which improved the self-cleaning ability of the irrigator. Based on the analysis of blockage performance, the passing rate of particles is significantly improved after optimizing the flow channel. Considering the optimized emitter has excellent hydraulic performance and anti-clogging properties.