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2013 | R. 89, nr 3b | 236--241
Tytuł artykułu

The characteristics of two-blade Submersible Mixers’ flow field inner the pool

Wybrane pełne teksty z tego czasopisma
Warianty tytułu
PL
Charakterystyka pola przepływu w basenie z mieszaczem dwułopatowym
Języki publikacji
EN
Abstrakty
EN
To study the flow pattern of submersible mixers inner the pool, the research uses FLUENT6.3 mainframe computational fluid mechanics software as well as RNG k –εturbulent model、SIMPLE algorithm and rigid-lid assumption to numerically simulate the two-blade submersible mixers inner the sewage treatment pool and also analyzes the velocity distribution inner big pool and the distributions of the flow field, pressure and the velocity circulation inner the mixers’ impellers. The results indicate that the fluid flow inner the pool belongs to high Reynolds number with large turbulence intensity; the fluid flow is complex, and there exists obvious big vortex; Coanda Effect and boundary-layer separation is also apparent. Clearly large vortex exists and the flow velocity near the blades is higher while the flow velocity of the pool’s surface and bottom takes the form of double parabolic distribution and is lower. The velocity gradient and pressure gradient are obvious from working face to the blade back; the flow velocity is lower and the pressure is higher near the working face of the blades, moreover, there are high velocity zone and negative zone in the blade back. The velocity in the axis surface inlet and outlet the blades is also parabolic distributed, and its circulation does not vary considerably; the velocity in the axis surface inlet and outlet the blades is distributed similar as the velocity in the isometric axis surface, and its velocity circulation follows a linear law distribution. It can guide submersible mixer hydraulic performance in design study, simulation and engineering application.
PL
W artykule przedstawiono wyniki badań dotyczących przepływu w mieszaczach zatapialnych, znajdujących się w basenie. W celu przeprowadzenia symulacji mieszacza dwułopatowego, wykorzystano m. in. oprogramowanie FLUENT6.3, model turbulencji k-epsilon, algorytm SIMPLE oraz założono sztywność wieka. Analizie poddano także rozkład prędkości i cieśnienia wokół wirnika mieszacza. Wyniki badań zostały omówione i przedstawione wnioski.
Wydawca

Rocznik
Strony
236--241
Opis fizyczny
Bibliogr. 18 poz., il., schem., tab., wykr.
Twórcy
autor
autor
  • 301, Xuefu Road, Zhenjiang, 212013,Jiangsu Province, P.R. China, wdshi@ujs.edu.cn
autor
  • Research Center of Fluid Machinery Engineering and Technology of Jiangsu University, qihua05@163.com
autor
autor
  • Research Center of Fluid Machinery Engineering and Technology of Jiangsu University, desheng1982@163.com
Bibliografia
  • [1] XU Weixing. Design Theory of Submersible Mixer Impeller and Numerical Simulation of Agitated Flow Field. 2006.4-5.
  • [2] WU Wei-qiang. Introduction How to Select Mixer in Sewage Treatment Plant. China Science and Technology Information. May.2008,116-118.
  • [3] YAN Jianhua, HUANG Jiandao, TENG Guorong. Research on Rural Domestic Sewage Disposal of Biologic Disposal High Efficiency Blender. Journal of Anhui Agri Sci., 37 (2009), No.20, 9606 – 9607.
  • [4] SHI Wei-dong, TIAN Fei. Study on Inner Flow of New-Type Streamline XCK Mixer with Two Blades. Hydraulic influence factors and inner flow analysis of centrifugal fire pump, 26(2008), No. 6, 6-9.
  • [5] Ventikos Y, Tzabiras G. A numerical study of the steady and unsteady cavitation phenomenon around hydrofoils. In: CAV'95 International Conference, Deauville, France. 1995.
  • [6] Spalding DB. Numerical computation of multi-phase flows. V.K.I. for Fluid Dynamics. Lecture Series, 1981.
  • [7] Kinnas SA, Fine NE. A numerical non-linear analysis of the flow around two- dimensional and three-dimensional partially cavitating hydrofoils. J Fluid Mech. 254(1993), 51-81.
  • [8] Li Guowei1, Wang Yan2, Lü Xiuli1,et al. Numerical simulation of three-dimensional flow field in centrifugal pump with deviated short splitter vanes. Transactions of the CSAE, 27(2011), No. 7,151-155.
  • [9] TIAN Fei, SHI Weidong. Hydraulic Design and Experimental Study on the Wastewater Treatment Mixer. FLUID MACHINERY, 39(2011), No. 6, 1-4.
  • [10] TIAN Fei, SHI Weidong. The effect of dome on wastewatertreatment mixer performance. Journal of Engineering Thermophysics, 31(2010), 245-248.
  • [11] SHI Weidong, TIAN Fei. Flow Analysis and Measurement of Wastewater Treatment Mixer with Dome. China Academic Journal Electronic Publishing House, 42(2011), No.3, 96-99.
  • [12] SHI Wei-dong, ZHANG Qi-hua, LU Wei-gang. Hydraulic design of new-type deep well pump and its flow calculation. Journal of Jiang su Un iversity( Natural Science Edition. 27(2006), No. 6, 529-531.
  • [13] Wang Fujun, Zhang Ling, Zhang Zhimin. Analysis on pressure fluctuation of unsteady flow in axial flow pump. Journal of Hydraulic Engineering, 38(2007), No. 8, 1003-1009.
  • [14] L. Prandtl, K. Oswatitsch. Prandtl's Essentials of Fluid Mechanics. BEIJING, Aerospace Science press 1984, 75-400.
  • [15] Guang Dong engineering College Group, “Marine propeller design,” People Traffic Press, 1976, 12-13. ( in Chinese )
  • [16] Wang Kai, Lv Jun. mixing equipment. Beijing: Chemical Industry Press,2004.
  • [17] Yousefi Hassan, Noorzad Asadollah, Farjoodi Jamshid. Multiresolution-Based Adaptive Simulation of Wave Equation. Applied Mathematics & Information Sciences, 6(2012), No. 1, 47-58.
  • [18] Koun-Tem Sun , Ching-Ling Lin, Hsin-Te Chan , Hong-Ming Kang , Man-Ting Ku, Comparisons between the Hybrid Taguchi-Genetic Algorithm and Genetic Algorithm, Advances in Industrial Engineering and Management, 1(2012), No.1, 10-18
Typ dokumentu
Bibliografia
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