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当前位置: 首页 > 文章 > 颗粒粒径对深海采矿提升泵工作性能影响分析 海洋湖沼通报 2016 (5) 50-59
Position: Home > Articles > Analysis on Influence of Particle Diameter on Lift Pump Work Performance for Deep-sea Mining Transactions of Oceanology and Limnology 2016 (5) 50-59

颗粒粒径对深海采矿提升泵工作性能影响分析

作  者：
徐海良;曾义聪;陈奇;周卓
单  位：
中南大学机电工程学院中南大学高性能复杂制造国家重点实验室;中南大学机电工程学院;长沙民政职业技术学院电子工程系
关键词：
颗粒粒径;深海采矿;提升泵;工作性能
摘  要：
为研究颗粒粒径对深海采矿提升泵工作性能影响,采用RNGκ-ε湍流模型和Hinze-Tchen颗粒湍流粘性系数模型,运用Fluent软件对采矿提升泵内固液两相流进行数值模拟,比较不同的颗粒粒径对采矿提升泵内颗粒浓度、速度、压力分布的影响,进而分析颗粒粒径对扬程、效率等工作性能的影响,指导深海采矿提升泵的设计。研究结果表明:在转速、流量、颗粒体积分数不变情况下,随着颗粒粒径增大,泵的扬程和效率都逐渐下降;叶轮叶片中前部流道内浆体的颗粒浓度大幅上升,叶轮流道内颗粒动态沉积更加严重,叶轮流道过流面积随之减小,反而加大了叶轮流道内贯流的相对速度,从而有效地抑制了边界层分离的发生,但在叶轮叶片中后部压力面上浆体压力下降幅度较大,泵内浆体总压逐渐下降,扬程随之减小;在叶轮出口处,流道内固液两相流的速度差异增大,在叶轮出口处形成的射流-尾迹结构增强,并在空间导叶流道内形成更加明显的二次流及漩涡,从而加大水力损失,降低效率。实验证实了数值模拟方法的可行性及准确性。
译  名：
Analysis on Influence of Particle Diameter on Lift Pump Work Performance for Deep-sea Mining
作  者：
XU Hailiang;ZENG Yicong;CHEN Qi;ZHOU Zhuo;School of Mechanical and Electrical Engineering,Central South University;State Key Laboratory Of High Performance Complex Manufacturing,Central South University;
关键词：
particle diameter;;deep-sea mining;;lift pump;;work performance
摘  要：
In order to study how the particle diameter affects work performance of a lift pump for deepsea mining,with the RNGκ-εturbulence model and Hinze-Tchen particle turbulent viscosity coefficient model,the numerical analysis of solid-liquid two-phase flow of a lift pump are carried on using the Fluent software.Effects of different particle diameters of a lift pump on distribution of particle concentration,velocity and pressure are compared.Thus effects of different particle diameters of a lift pump on work performance such as pump head and efficiency are analyzed.It will conduct the design of a lift pump.Results show that when the pump rotational speed,flow rate and particle volume fraction remain unchanged,particles diameters becoming bigger,the head and efficiency of the pump decrease gradually.The pulp particle concentration in the channel of the middle or front impeller blade increases significantly.Particles in the impeller channel dynamic deposit more seriously so that flow area decreases with it.The relative velocity of the flow in the impeller is increased.It will prevent the boundary layer separate effectively.But the pulp pressure in the middle or back of the blade pressure surface decreases rapidly.The total pulp pressure in the pump decreases gradually,and then the pump head also decreases with it.When the difference of the solid-liquid two-phase flow velocity in the flow channel becomes larger,the jet and wake structure formed at the impeller outlet becomes more strong,and then the second flow and vortex formed in the vane diffuser channel become more obvious.Thus the hydraulic loss increases and the efficiency of the pump decreases.The experiment proves that the numerical simulation method is feasible and accurate.

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