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| Analysis of characteristics of pressure fluctuation inside submersible mixer |
| Tian Fei1, Shi Weidong2, Lu Xining3, Zhang Desheng2, Lang Tao2 |
| 1.School of Energy and Power Engineering, Jiangsu University, Zhenjiang, Jiangsu 212013, China; 2.National Research Center of Pumps, Jiangsu University, Zhenjiang, Jiangsu 212013, China; 3.Shanghai Kaiquan Pump(Group)Co.Ltd., Shanghai 201700, China |
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Abstract For a thorough study on the vibration induced by pressure fluctuation inside a submersible mixer, the unsteady, three-dimensional turbulent flow driven by a specific submersible mixer in a se-wage treatment pool is simulated by using software-Fluent 6.3 and Gambit. The RNG k-ε turbulence model, PISO algorithm, rigid-lid approximation and sliding mesh are adopted in the simulation. The pressure fluctuation characteristics in the impeller of submersible mixer are clarified based on an examination of the unsteady flow field features in the impeller and pool. It is shown that the flow of the fluid inside the impeller and in the vicinity of impeller exhibits an obvious periodic feature, i.e. the fluid domain with high pressure and low relative velocity and the domain with low pressure but high relative velocity vary periodically with the rotating impeller. The pressure fluctuation frequency of the fluid in the impeller entrance, outlet and inside the impeller is closely related to impeller rotational frequency, and the predominant frequency is 2 times the blade passing frequency. The results may provide a reference for application of the mixers.
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Received: 06 November 2013
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| [1]田飞,施卫东,卢熙宁,等.潜水搅拌机分布对污水处理池搅拌效果的影响[J].排灌机械工程学报,2013,31(2):146-150. Tian Fei,Shi Weidong,Lu Xining,et al.Mixing effect in sewage treatment pool by distribution of submersible mixers[J].Journal of Drainage and Irrigation Machinery Engineering, 2013,31(2):146-150.(in Chinese)[2]Tian Fei, Shi Weidong, Jiang Hua. Inner flow field of pool mixed by three submersible mixers[J].Journal of Advanced Manufacturing Systems,2012, 11(2): 91-97.[3]Wang Chuan, Shi Weidong, Li Yue, et al. Structural analysis of explosion proof mine pump base on the mate-rial of QT600-3 [J]. Journal of Computational and Theoretical Nanoscience, 2013, 10(12):2847-2852.[4]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.[5]韩占忠, 王敬, 兰小平. FLUENT流体工程仿真计算实例与应用[M]. 北京:北京理工大学出版社,2010.[6]施卫东, 田飞, 陈斌. 带导流壳的污水处理搅拌机流动分析与试验[J]. 农业机械学报,2011,42(3):96-99. Shi Weidong,Tian Fei,Chen Bin.Flow analysis and measurement of wastewater treatment mixer with dome[J].Transactions of the Chinese Society for Agricultural Machinery, 2011, 42(3): 96-99.(in Chinese)[7]Tian Fei, Shi Weidong, Jiang Hua,et al. Study on velocity distribution in a pool by submersible mixers[J]. IOP Conference Series: Earth and Environmental Science, 2012,15(5):1-8.[8]田飞, 施卫东, 张启华, 等. 2叶片潜水搅拌机叶轮内部流场特性[J],江苏大学学报:自然科学版,2013,34(4):20-24. Tian Fei,Shi Weidong,Zhang Qihua,et al. Inner flow characteristics at impeller of submersible mixer with two blades[J].Journal of Jiangsu University:Natural Science Edition, 2013,34(4):20-24.(in Chinese)[9]付宗甫,严忠明,周春天,等. 双向进水流道模型脉动压力测试及其特性[J].中国农村水利水电,2005(1):88-91. Fu Zongfu, Yan Zhongming, Zhou Chuntian,et al. Pulsation pressure test of a two-way-inlet duct model and its characteristics[J]. China Rural Water and Hydropower,2005(1):88-91.(in Chinese)[10]张洪博,陈红勋,张伟,等.离心泵定常计算中叶轮转动位置的影响[J].上海大学学报:自然科学版,2009, 15(5):470-473. Zhang Hongbo,Chen Hongxun,Zhang Wei,et al. Effect of impeller position in steady calculation of centrifugal pump[J].Journal of Shanghai University:Natural Science Edition,2009, 15(5):470-473.(in Chinese) |
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