Study on Erosion Resistance of Petal-shaped Elbow Pipe
The erosion damage is a frequent failure for the elbow in gas-solid two-phase system,which is directly related to the reliability and working life of the pipeline system.A petal shaped elbow structure to improve the anti-erosion performance of the elbow is proposed.The gas-solid flow characteristics of the elbow structure were analyzed by using CFD-DPM method.The results show that the petal-shaped structure at different positions has the same V-shaped erosion distribution as the conventional elbow.Before the first impact on the particle wall,the particle track can be changed and a circulation zone can be formed on the back of the particle,which can inhibit the erosion to a certain extent.The best anti-erosion position of petal-shaped structure is θ=20°and this position does not change with the change of flow rate and particle mass flow rate.Comparing with the conventional elbow without petal-shaped structure,the anti-erosion performance is improved by 17.27%.This structure can improve the erosion resistance of the elbow and extend the life of the pipe.
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