Abstract:The research of micro-irrigation screen filter was mainly concentrated in hydraulic perfor-mance test. Computational fluid dynamics software Fluent 6.3 was adopted to simulate the flow and ana-lyze the hydraulic performance of a 2 inches AZUD micro-irrigation screen filter. The screen was predigested as a porous media, and the models were built by 3D software Pro/E. Results show that the si-mulated results and experiment results agree well with each other. The maximum relative deviation was 8%, and averaged relative deviation was 4.4%. The filter internal flow distribution, the balance of screen velocity distribution and the filter life have been improved by optimizing inlet and outlet location, inlet and outlet angle and filter shapes under the same filter area and inlet diameter. Optimization results show that the head loss is reduced by 69% and the maximum speed difference between both sides on screen filter surface is decreased from 1.0 m/s to 0.1 m/s.
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