Analysis on Influence of Rotational Speed on Solid-liquid Flow Velocity Vector Distribution in Slurry Pump
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摘要: 为了研究转速对深海采矿矿浆泵内部流动特性及对工作性能的影响,应用欧拉模型,RNG κ-ε(Renormalization-group κ-ε)湍流模型及SIMPLEC算法,对矿浆泵叶轮及空间导叶内固液两相流场进行数值模拟,研究叶轮叶片和导叶叶片的绝对速度分布及外特性的影响。结果表明:随着转速n的增大,叶轮流道区域内的边界层更易分离,过流能力减弱,在叶轮出口处,射流-尾迹结构越强,水力损失越严重。空间导叶流道进口处的冲击更加猛烈,此区域流动愈加混乱,在导叶压力面进口处出现了范围更大的二次流。但随着转速n的增大,混合流体在导叶吸力面进口处的流动分离被抑制了,增大了过流能力,减弱了水力损失。Abstract: With the application of Euler model, RNG κ-ε(Renormalization-group κ-ε) turbulence model and SIMPLEC algorithm, the numerical analysis of solid-liquid two phase flow of impeller and diffuser in slurry pump was carried on to investigate the internal characteristics of flow field and performance on the influence of rotational speed in slurry pump for deep-sea mining. The effects of absolute velocity distribution of impeller blades and guide vanes and performance of slurry pump were researched. The results show that: when the rotational speed increases,the boundary layer separates more easily in the impeller flow region, and the flow capacity weakens; At the outlet of impeller, the stronger the jet-wake structure is, the more serious hydraulic loss is; The more violent the impact of space guide vane inlet is, the more confused the flow of the region is, and there is a large scale two flow in the inlet of the guide vane pressure. However, with the increase of the rotational speed,the flow separation of the mixed fluid at the inlet of the guide vane suction surface is suppressed, which increases the flow capacity and reduces the hydraulic loss.
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Key words:
- deep-sea mining /
- slurry pump /
- rotational speed /
- solid-liquid two phase flow /
- numerical simulation
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[1] Dean W S, Leinen M, Stow D A V. Classification of deep-sea, fine-grain sediments[J]. Journal of Sedimentary Research, 1985,55(2):250-256 [2] 谢龙水.深海多金属结核采集方法的技术评价[J].湖南有色金属,1994,10(6):326-333 Xie L S. Technical evaluation of the collection method of deep sea polymetallic nodules[J]. Hunan Nonferrous Metals, 1994,10(6):326-333(in Chinese) [3] 阳宁,夏建新.国际海底资源开发技术及其发展趋势[J].矿冶工程,2000,20(1):1-4 Yang N, Xia J X. Development techniques for international sea-floor resources and their future trend[J]. Mining and Metallurgical Engineering, 2000,20(1):1-4(in Chinese) [4] Park Y C, Yoon C H, Lee D K, et al. Experimental studies on hydraulic lifting of solid-liquid two-phase flow[J]. Ocean and Polar Research, 2004,26(4):647-653 [5] Park J M, Yoon C H, Park Y C, et al. A study on the solid-liquid helical flow in a slim hole annulus[C]//Proceedings of the 7th ISOPE Ocean Mining Symposium, Lisbon, Portugal:International Society of Offshore and Polar Engineers, 2007:162-166 [6] Park S J, Yeu T K, Hong S, et al. Design of a hardware-in-the-loop simulation (HILS) of control and monitoring system for deep-seabed manganese nodule miner[C]//Proceedings of the 7th ISOPE Ocean Mining Symposium. Lisbon, Portugal:International Society of Offshore and Polar Engineers, 2007:198-203 [7] Yoon C H, Kang J S, Park J M, et al. Flow analysis by CFD model of lifting system for shallow sea test[C]//Proceedings of the 8th ISOPE Ocean Mining Symposium, Chennai:International Society of Offshore and Polar Engineers, 2009:225-228 [8] Hong S, Kim H W, Choi J S. A way to accomplish the mining technology for poly-metallic nodules[C]//ISA Workshop on Polymetallic Nodule Mining Technology, Chennai, India:ISA, 2008 [9] Yoon C H, Park J M, Kang J S, et al. Shallow lifting test for the development of deep ocean mineral resources in Korea[C]//Proceedings of the 9th ISOPE Ocean Mining Symposium, Hawaii:International Society of Offshore and Polar Engineers, 2011:149-152 [10] 中国大洋矿产资源研究开发协会.大洋多金属结核中试采矿系统"九五"综合湖试报告[R].中国大洋协会,2002 China Ocean Mineral Resources Research and Development Association. Pilot mining system of ocean polymetallic nodules:"Nine Five"[R]. China Ocean Association, 2002 [11] Zou W S. COMRA's research on lifting motor pump[C]//Proceedings of the 7th ISOPE Ocean Mining Symposium, Lisbon, Portugal:International Society of Offshore and Polar Engineers, 2007:177-180 [12] Zou W S, Chen A L, Li Z H. China's research on lifting motor pump for deep sea mining[C]//Proceedings of the 13th International Conference on Transport & Sedimentation of Solid Particles, Wroclaw, Poland, 2011:6-9 [13] Rogers S. Seafloor resource production[R]. Nautilus Minerals Limited Research Report, 2012:38-45 [14] Zou W S. COMRA's research on lifting motor pump[C]//Proceedings of the 7th ISOPE Ocean Mining Symposium, Lisbon, Portugal:International Society of Offshore and Polar Engineers, 2007:177-180 [15] Yoon C H, Park J M, Kang J S, et al. Shallow lifting test for the development of deep ocean mineral resources in Korea[C]//Proceedings of the 9th ISOPE Ocean Mining Symposium, Hawaii:International Society of Offshore and Polar Engineers, 2011:149-152 [16] Kuntz G. The technical advantages of submersible motor pumps in deep sea technology and the delivery of manganese nodules[C]//Proceedings of 1979 Offshore Technology Conference, Houston, Texas:OTC, 1979:85-91 [17] Kurushima M, Kuriyagawa M, Koyama N K. Japanese program for Ikp seabed mineral resources development[C]//Proceedings of 1995 Offshore Technology Conference. Houston:OTC, 1995:60-68 [18] 戴江,吴玉林,孙自祥,等.离心泵叶轮中固液两相紊流计算[J].工程热物理学报,1996,17(1):46-49 Dai J, Wu Y L, Sun Z X, et al. Simulation of particulate-liquid two-phase turbulent flows through a gentrifugal pump impeller[J]. Journal of Engineering Thermophysics, 1996,17(1):46-49(in Chinese) [19] 王福军.计算流体动力学分析——CFD软件原理与应用[M].北京:清华大学出版社,2004 Wang F J. Computational fluid dynamics analysis[M]. Beijing:Tsinghua University Press, 2004(in Chinese) [20] "十五"采矿海试系统总师组.大洋多金属结核中试采矿系统1000m海上试验总体系统技术设计[R].北京:中国大洋协会研究报告,2004"Fifteen" Sea Trial Mining Systems Division Group. The overall system design of the 1000m test system for marine polymetallic nodules[R]. Beijing:Research Report of China Ocean Association, 2004(in Chinese)
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