Most Suitable Blade Inclination Angle for Multiphase Flow in Soybean Milk Machine

Document Type : Regular Article

Authors

1 Faculty of Mechanical Engineering and Automation, Zhejiang Sci-Tech University, Hangzhou, Zhejiang 310018, China

2 School of Mechanical and Electrical Engineering, Wenzhou University, Wenzhou, Zhejiang, 325035, China

10.47176/jafm.15.02.32972

Abstract

The blade inclination angle of soybean milk machine is a key geometric parameter for efficient crushing. For the purpose of obtaining optimal design, the gas-liquid two-phase flow field inside a soybean milk machine is simulated. The gas holdup from simulation is in agreement with the experiment. The simulation result shows that the lower blade A has a great influence on the internal flow field of soybean milk machine, while the upper blade B has a small influence on the flow field. As the angle l αA l  increases, the peak value of radial velocity decreases and moves to the interior of the cavity, so does the total pressure. When αA changes from -24° to -26°, the velocity vector at the bottom of the cavity changes from the connected state to the separated state, and the pressure difference between the up and the bottom surface of blade A becomes large. When αA = 24°, the flow field has the strongest turbulent kinetic energy and dissipation. When αB =28°, the pressure difference reaches the maximum. In summary, the best inclination angles are αAopt =-24° ∼ -26° and αBopt =28°, respectively.

Keywords


Buffo, M. M., L. J. Corrêa, M. N. Esperanca, A. J. G. Cruz, C. S. Farinas and A. C. Badino (2016). Influence of dual-impeller type and configuration on oxygen transfer, power consumption, and shear rate in a stirred tank bioreactor. Biochemical Engineering Journal 114, 130-139.##
Gradov, D. V., A. Laari, I. Turunen and T. Koiranen (2017). Experimentally validated CFD model for gas-liquid flow in a round-bottom stirred tank equipped with Rushton turbine. International Journal of Chemical Reactor Engineering 15(2).##
Guini, Y. (2014). Numerical simulation of multi-layer agitator blade in high temperature floating two-phase flow field. Biotechnology: An Indian Journal 10(24):15984-15992.##
Jia, H. L., F. Wang, J. X. Wu, X. Tan and M. Li (2020). CFD research on the influence of 45°disk turbine agitator blade diameter on the solid-liquid mixing characteristics of the cone-bottom stirred tank. Arabian Journal for Science and Engineering 45, 5741-5749.##
Kerdouss, F., A. Bannari and P. Proulx (2006). CFD modeling of gas dispersion and bubble size in a double turbine stirred tank. Chemical Engineering Science 61(10), 3313-3322.##
Khopkar, A. R., A. R. Rammohan, V. V. Ranade and M. P. Dudukovic (2005). Gas-liquid flow generated by a Rushton turbine in stirred vessel: CARPT/CT measurements and CFD simulations. Chemical Engineering Science 60(8-9), 2215-2229.##
Lane, G. L., M. P. Schwarz and G. M. Evans (2002). Predicting gas-liquid flow in a mechanically stirred tank. Applied Mathematical Modelling 26(2), 223-235.##
Li, L., H. S. Dou, Y. Du, H. W. Guo and H. Huang (2020). Study on critical speed of vortex rupture and gas-liquid two-phase flow in rotating soybean milk machine. International Journal of Food Engineering 17(2), 97-110.##
Li, L.C., J. J. Wang, X. P. Gu, L. F. Feng, and B. G. Li (2010). Computational fluid dynamics simulation of bubble size andlocal gas holdup in stirred vessel. Journal of Zhejiang University (Engineering Science) 044 (012), 2396-2400, 2415.##
Li, X. J., X. P. Guan, N. Yang and M. Y. Liu (2017). Experimental study and CFD simulation of gas-liquid flow in a stirred tank using the EMMS drag model. Chemical Industryand Engineering Progress 36(11), 4000-4009.##
Prakash, B., T. Bhatelia, D, Wadnerkar, M. T. Shah, V. K. Pareek and R. P. Utikar (2019). Vortex shape and gas-liquid hydrodynamics in unbaffled stirred tank. The Canadian Journal of Chemical Engineering 97(6), 1913-1920.##
Ren, P. F. and J. Nan (2015). CFD and experimental studies on the impact of impeller type on flow field and floc size evolution in a stirred tank. International Conference on Advances in Energy & Environmental Science 1473-1481.##
Sanaie-Moghadam, M., M. Jahangiri and F. Hormozi (2015). Determination of stationary region boundary in multiple reference frames method in a mixing system agitated by helical ribbon impeller using CFD. Journal of Heat and Mass Transfer Research 2(01), 31-37.##
Shao, X. M., X. L. Liu and Y. L. Li (2010). Experimental study of influence of the impeller spacing on flow behaviour of double-impeller stirred tank. The Canadian Journal of Chemical Engineering 81(6), 1239-1245.##
Song, Q., X. B. Ze and X. Han (2017). Study of the flow field in household soymilk maker in relation to spoiler ribs quantity and location. International Conference on Mechanics and Mechatronics 5, 98-101.##
Thakur, S, and J. Wright (2003) CFD Predictions of Turbomachinery Flows Using Quasi-Steady and Unsteady Models. Aiaa Fluid Dynamics Conference & Exhibit.##
Tian, L., Y. Liu, J. J. Tang, G. Z. Lv and T. A. Zhang (2017). Variation law of gas holdup in an autoclave during the pressure leaching process by using a mixed-flow agitator. International Journal of Minerals Metallurgy and Materials 24(8), 876-883.##
Wang, G., L .J. Zhou, S. B. Xiong, Q. R. Li, M. C. Wu and S. M. Zhao (2011). Effects of blender structure and its force of soybean milk machine on soybean milk quality. Food Science 32(7), 162-167.##
Wang, J. J., L. C. Li, X. P. Gu and L. F. Feng (2012). Progress on CFD simulation of gas-liquid two-phase flow in stirred tank reactor. Process Equipment & Piping 49 (001), 1-4.##
Wu, M. C., C. S. Wu, J. Y. Liang, Y. T. Lei and B. Yang (2017). Study on shear properties of six kinds of conventional agitator. Chemical Engineering (China) 45(08), 68-73.##
Wu, Y., B. C. Ong and M. H. Al-Dahhan (2001). Predictions of radial gas holdup profiles in bubble column reactors. Chemical Engineering Science 56(3), 1207-1210.##
Zhang, Y. Q., X. Pan, Y. H. Wang, P. C. Luo and H. Wu (2018). Numerical and experimental investigation on surface air entrainment mechanisms of a novel long-short blades agitator. AIChE Journal 64(1), 316-325.##
Zhang, Y., Y. Yong, Z. S. Mao, C. Yang, H. Sun, H. Wang and C. Yang (2010). Numerical simulation of gas-liquid flow in a stirred tank with swirl modification. Chemical Engineering & Technology 32(8), 1266-1273.##
Zhou, C., H. W. Zhao and J. K. Zheng (2013). Impact of Blade Installing Angle on Open Turbine Stirrer. Machine Building & Automation 41(1), 27-30.##
Volume 15, Issue 2 - Serial Number 63
March and April 2022
Pages 349-361
  • Received: 06 May 2021
  • Revised: 16 August 2021
  • Accepted: 15 September 2021
  • First Publish Date: 29 January 2022