深海采矿矿浆泵内颗粒流动规律的数值模拟

发布时间：2018-05-13 03:20

本文选题：深海采矿 + 矿浆泵　；参考：《中南大学学报(自然科学版)》2017年01期

【摘要】：针对深海采矿输送系统中矿浆泵易磨损等问题,采用RNGκ-ε湍流模型求解矿浆泵内的清水流场,并与试验结果进行对比验证模拟结果的准确性;在此基础上运用离散相模型模拟颗粒流动轨迹,研究转速、流量和颗粒粒径对矿浆泵冲蚀磨损特性的影响。研究结果表明:转速越高,颗粒与过流部件壁面发生冲击的概率增大,冲击速度大幅度升高,加剧过流部件磨损;流量越大,颗粒冲击叶片压力面的位置逐渐移向叶片头部,冲击角度随之增大,颗粒出流角越大,易与导叶吸力面头部发生冲击,流动愈紊乱;小粒径颗粒未与叶轮发生冲击,但冲击空间导叶的速度较大,对空间导叶的磨损较叶轮更严重;大粒径颗粒对叶轮和空间导叶的磨损程度差别不大,更符合等寿命设计原则。
[Abstract]:Aiming at the problem that slurry pump is easy to wear in deep-sea mining transportation system, RNG 魏-蔚 turbulence model is used to solve the clear water flow field in slurry pump, and the simulation results are compared with the experimental results to verify the accuracy of the simulation results. On this basis, the discrete phase model was used to simulate the particle flow path, and the effects of rotational speed, flow rate and particle size on erosion and wear characteristics of slurry pump were studied. The results show that the higher the rotating speed, the higher the probability of impact on the wall surface of the particle and the overflowing part, the higher the impact velocity, the more the wear of the flow part, and the more the flow rate, the more the position of the impingement pressure surface moves to the blade head. With the increase of impact angle, the larger the outlet angle of particles is, the easier impact is on the suction surface of the guide vane and the flow becomes more and more disordered, and the smaller particle size does not impact with the impeller, but the velocity of impact on the guide vane in the space is larger. The wear of the space guide vane is more serious than that of the impeller, and the wear degree of the large particle size to the impeller and the spatial guide vane is not different, which is more in line with the principle of equal life design.
【作者单位】：中南大学高性能复杂制造国家重点实验室;
【基金】：国家自然科学基金资助项目(51375498) 教育部博士点基金资助项目(20130162110004)~~
【分类号】：TD857

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