Simulations and analysis of erosion characteristics of T-type screen filters based on CFD-DPM model
The porous jump model and simplified filter screen model were used to combine CFD-DPM two-phase flow model to numerically simulate and predict the erosion rate of the screen by a single-fac-tor approach to explore the overall erosion effect of different areas of the screen.The significance of the effect of each factor on the maximum erosion rate was obtained through a multi-factor main effects anal-ysis based on an orthogonal test.The results show that the maximum erosion rate in a certain range is negatively correlated with the particle size and positively correlated with the mass flow rate and flow ve-locity.The wall surface of the filter pore is generally more susceptible to erosion damage than the head-water surface,while the backwater surface is almost unaffected by erosion.The effect of particle size and mass flow rate on the size of the area of high erosion incidence is relatively small(area increase of 15.0％-16.7％),while the effect of flow velocity is more significant(with an area increase of 50.0％).The filter screen near the bottom of the outlet pipe has a higher risk of erosion damage be-cause the flow rate is significantly higher than other filter screens.The probability values of flow rate,mass flow rate,and particle size for the maximum erosion rate are of 0.012 80,0.002 69,and 3.712× 10-9 respectively,and all show significant correlations.
万方数据
维普
