| YANG Hong-lin,WU Yu-guo,JIANG Shuo-shuo,LIU Meng.Numerical Simulation of Erosion Prediction in Venturi[J],47(10):193-199 |
| Numerical Simulation of Erosion Prediction in Venturi |
| Received:March 30, 2018 Revised:October 20, 2018 |
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| DOI：10.16490/j.cnki.issn.1001-3660.2018.10.026 |
| KeyWord:safety particle venture liquid-solid two-phase flow maximum erosion rate |
| Author | Institution |
| YANG Hong-lin |
School of Petroleum and Gas Engineering, Liaoning Shihua University, Fushun, China |
| WU Yu-guo |
School of Petroleum and Gas Engineering, Liaoning Shihua University, Fushun, China |
| JIANG Shuo-shuo |
School of Petroleum and Gas Engineering, Liaoning Shihua University, Fushun, China |
| LIU Meng |
School of Petroleum and Gas Engineering, Liaoning Shihua University, Fushun, China |
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| Abstract: |
| The work aims to prevent the influence of liquid-solid two-phase flow erosion on the inner surface of pipe per-formance, especially in the reducer where erosion is likely to occur. Based on computational fluid dynamics (CFD) and fluid-solid interaction theory, numerical simulation and discrete-phase model (DPM) were used to analyze the flow field by the standard k-ε eddy current through the CFD technique. The influences of erosion angle, fluid velocity, particle size of solid particles and particle mass flow on the erosion behavior of venturi tube were investigated, and the location and severity of erosion at the tube was predicted. As contraction angle of venturi tube increased from 10° to 70°, the maximum erosion rate increased to 3.82?10?5 kg/(m2?s) and then increased to 6.23?10?5 kg/(m2?s) when the angle decreased to 45°. As the inlet flow rate increased from 8 m/s to 20 m/s, the maximum erosion rate increased from 9.44?10?7 kg/(m2?s) to 5.09?10?6 kg/(m2?s). As the particle size of scouring solids increased from 6.25 μm to 300 μm, the maximum erosion rate decreased from 8.32?10?7 kg/(m2?s) to 7.64?10?8 kg/(m2?s). As the mass flow rate increased from 0.002 kg/s to 0.008 kg/s, the maximum erosion rate increased from 8.41?10?8 kg/(m2?s) to 4.21?10?7 kg/(m2?s). The scour corrosion behavior increases with the increase of erosion angle and then decreases and increases again. With the increase of flow velocity, the erosion increases significantly, but gradually decreases with the increase of particle size. Moreover, the erosion also increases with the increase of mass flow rate. The erosion behavior is most likely to occur in the contraction section (throttle zone) of venturi tube, and the erosion behavior of the lower part of the pipeline is more serious. In order to reduce the scour corrosion behavior, we should design the venturi tube with 45° throat angle, control the fluid velocity, reduce the passing of small particle size particles and decrease the mass flow. |
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