杨鸿麟,吴玉国,蒋硕硕,刘萌.文丘里管冲刷腐蚀数值模拟[J].表面技术,2018,47(10):193-199.
YANG Hong-lin,WU Yu-guo,JIANG Shuo-shuo,LIU Meng.Numerical Simulation of Erosion Prediction in Venturi[J].Surface Technology,2018,47(10):193-199 |
| 文丘里管冲刷腐蚀数值模拟 |
| Numerical Simulation of Erosion Prediction in Venturi |
| 投稿时间：2018-03-30 修订日期：2018-10-20 |
| DOI：10.16490/j.cnki.issn.1001-3660.2018.10.026 |
| 中文关键词: 安全 颗粒 冲刷腐蚀 文丘里管 液固两相流 最大冲蚀率 |
| 英文关键词:safety particle venture liquid-solid two-phase flow maximum erosion rate |
| 基金项目:国家自然科学基金项目（51046002）；辽宁省教育厅科学研究项目（L2015306） |
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| Author | Institution |
| YANG Hong-lin | School of Petroleum and Gas Engineering, Liaoning Shihua University, Fushun113006, China |
| WU Yu-guo | School of Petroleum and Gas Engineering, Liaoning Shihua University, Fushun113006, China |
| JIANG Shuo-shuo | School of Petroleum and Gas Engineering, Liaoning Shihua University, Fushun113006, China |
| LIU Meng | School of Petroleum and Gas Engineering, Liaoning Shihua University, Fushun113006, China |
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| 中文摘要: |
| 目的 预防液固两相流冲刷腐蚀对管道内表面性能的影响，特别是在发生冲刷腐蚀可能性较大的变径管处。方法 基于计算流体力学和流固耦合原理，通过CFD中流固耦合技术，利用标准k-?涡流进行数值分析与离散相模型（DPM）进行流场分析。探究冲蚀角度、流体速度、固体颗粒粒径、颗粒质量流量对文丘里管冲刷腐蚀行为的影响规律，预测变径管处发生冲刷腐蚀行为的位置及严重程度。结果 文丘里管收缩角度从10°增加至70°时，最大冲蚀率先增加到3.82?10?5 kg/(m2?s)，而在45°降到最小，后再次增加至6.23?10?5 kg/(m2?s)；入口流速从8 m/s增加至20 m/s时，最大冲蚀率从9.44?10?7 kg/(m2?s)增加到5.09? 10?6 kg/(m2?s)；冲刷固体颗粒粒径从6.25 μm 增加至300 μm时，最大冲蚀率从8.32?10?7 kg/(m2?s)减小7.64? 10?8 kg/(m2?s)；质量流量从0.002 kg/s增加到0.008 kg/s时，最大冲蚀率从8.41?10?8 kg/(m2?s)增加到4.21? 10?7 kg/(m2?s)。结论 冲刷腐蚀行为随着冲蚀角度增大，先增强后减弱，再增强；随流速增大而显著增强；随着粒径增大而逐渐减弱；随着质量流量的增大而增强。在文丘里管的收缩段（节流区）最易发生冲刷腐蚀行为，且管道下半部冲刷腐蚀行为更严重。应采用收缩角为45°的文丘里管、控制流体速度、减少小粒径颗粒及降低质量流量，来抑制冲刷腐蚀行为。 |
| 英文摘要: |
| 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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