期刊文献+

连续高速分散混合器内的流体力学性能——Ⅱ.数值模拟 被引量:1

Hydrodynamic Characteristics in a Continuous Rotor-Stator Mixer——Ⅱ.Numerical Simulation
下载PDF
导出
摘要 采用计算流体力学(CFD)方法研究连续高速分散混合器(CRS)的流体力学特性.采用FLUENT6.2软件,选用标准k-ε模型和滑移网格(SM)法,对CRS进行三维流动场的数值模拟.功率消耗的预测值与实验结果吻合良好,随雷诺数的增大功率准数NP基本不变,其模拟值为5.99,与实验的误差为13.7%.在中小流量下,水力学性能的模拟值与实验值吻合较好,但较高流量下由于液沫夹带而无法准确预测.模拟结果表明,CRS的最大泵送效率仅为13%,其功率消耗主要用于物料高效剪切混合;混合腔内的宏观流动场、剪切速率及湍流耗散率均呈非对称分布;对应转子不同的几何位置,定子槽内产生流型不同的漩涡,模拟结果与文献数据相吻合.研究结果可为工业CRS的优化设计提供参考. The hydrodynamic characteristics in a continuous rotor-stator mixer (CRS) were numerically simulated by using computational fluid dynamics (CFD) package FLUENT 6.2 with the SIMPLE algorithm in this work. The standard k-ε model and sliding mesh (SM) method were used in the simulation. The power number Np was constant with variation of Reynolds number Re, and the calculated Np equaled 5.99, the calculation error was 13.7% compared with the experimental value. The hydraulic characteristics under the lower flow rate conditions predicted by CFD are in good agreement with experimental data, though they are unable to be predicted reasonably under the larger flow rates because of the liquid entrainment. The results show that the maximum efficiency of the pumping capacity of CRS is only about 13%, and the power consumption is mainly used for high shear mixing. The predicted flow field and the distribution of shear rate are asymmetric, and each stator slot has a different circulation and re-entrainment pattern as the rotor is passing by the stators, which is in agreement with the literature. The results are of reference to the optimum design of industrial CRS.
出处 《过程工程学报》 CAS CSCD 北大核心 2007年第6期1060-1065,共6页 The Chinese Journal of Process Engineering
关键词 连续高速分散混合器 计算流体力学 数值模拟 continuous rotor-stator mixer computational fluid dynamics numerical simulation
  • 相关文献

参考文献12

  • 1董强,聂毅学,张华芹,高正明.连续高速分散混合器内的流体力学性能——Ⅰ.实验研究[J].过程工程学报,2007,7(6):1055-1059. 被引量:2
  • 2张文明,张裕中.剪切式均质机(泵)内流体流场的理论研究[J].江南大学学报(自然科学版),2002,1(2):147-149. 被引量:4
  • 3Kevala K R. Sliding Mesh Simulation of a Wide and Narrow Gap Inline Rotor-Stator Mixer [D]. Maryland: University of Maryland, 2001.25-46.
  • 4Barailler F, Heniche H, Tanguy P A. CFD Analysis of a Rotor-Stator Mixer with Viscous Fluids [J]. Chem. Eng. Sci., 2006, 61: 2888-2894.
  • 5张红梅.连续高速分散混合器混合特性的数值模拟[D].北京:北京化工大学,2005.16-53.
  • 6王福军.计算流体动力学分析[M].北京:清华大学出版社,2004.126-131,147-148.
  • 7Launder B E, Spalding D B. The Numerical Computations of Turbulent Flows [J]. Comput. Methods Appl. Mech. Eng., 1974, 3: 269-289.
  • 8Padron G A. Measurement and Comparison of Power Draw in Batch Rotor-Stator Mixers [D]. Maryland: University of Maryland, 2001. 54.
  • 9朱兵,陈红勋.湍流流动计算在管道式离心泵性能预测中的应用[J].水动力学研究与进展(A辑),2005,20(3):300-306. 被引量:11
  • 10Paul E L, Kresta S M, Atiem-Obeng V A. Handbook of Industrial Mixing: Science and Practice [M]. New York: John Wiley & Sons Inc., 2004, 470-505.

二级参考文献19

  • 1F·M 魏中磊(译).粘性流体动力学[M].北京:机械工业出版社,1992..
  • 2丁绪准 周理.液体搅拌[M].北京:化学工业出版社,1983.56-58.
  • 3永田进治著 马继顺译.混合原理与应用[M].北京:化学工业出版社,1984.24-58.
  • 4EDUARDO B M, JOAQUIN F F, et al. Numerical Simulation of Centrifugal Pumps[R]. ASME-FEDSM-200-11162.
  • 5JOSE'GONZA'LEZ, JOAQUI'N FERNA'NDEZ, et al. Numerical Simulation of the Dynamic Effects Due to Impeller-Volute Interaction in a Centrifugal Pump[J].ASME J. Fluids Eng, 2002,124: 348-355.
  • 6RODI W. and SCHEUERER G. Calculation of heat transfer to convection-cooled gas turbine blades[J].ASME Journal of Engineering for Gas Turbine and Power, 1985, 107: 620-627.
  • 7沈天耀.离心叶轮的内流理论基础[M].杭州:浙江大学出版社,1988..
  • 8Barailler F, Heniche M, Tanguy P A. CFD Analysis of a Rotor-Stator Mixer with Viscous Fluids [J]. Chem. Eng. Sci., 2006, 61(9): 2888-2894.
  • 9Maa Y F, Hsu C. Liquid-Liquid Emulsification by Rotor/Stator Homogenization [J]. J. Controlled Release, 1996, 38(2/3): 219-228.
  • 10Paul E L, Kresta S M, Atiem-Obeng V A. Handbook of Industrial Mixing: Science and Practice [M]. New York: John Wiley & Sons Inc., 2004. 470-505.

共引文献1235

同被引文献10

  • 1Bourne J R. Mixing and the selectivity of chemical reactions[J]. Org Process Research Development, 2003, 7 (4): 471 - 508.
  • 2Barailler F, Heniche M, Tanguy P A. CFD Analysis of a rotor-stator mixer with viscous fluids[J]. Chemical Engi- neering Science, 2006, 61(9):2888 - 2894.
  • 3Bolzern O, Bourne J R. Rapid chemical reactions in a centrifugal pump[J]. Chemical Engineering Research & Design, 1985, 63 : 275 - 282.
  • 4Bourne J R, Garcia-Rosas J. Rotor stator mixers for rapidmicromixing[J]. Chemical Engineering Research & Design, 1986,64: 11-17.
  • 5Padron G A. Measurement and comparison of power draw in batch rotor-stator mixer[ D]. Maryland: University of Maryland, 2001.
  • 6Fournier M C, Falk L, Villermaux J. A new parallel competing reaction system for assessing mieromixing efficiency-experimental approaeh[J ]. Chemical Engineering Science, 1996, 51(22) : 5053 - 5064.
  • 7Guichardon P, Falk L. Characterization of micromixing efficiency by the iodide-iodate reaction system. Part I: experimental procedure [ J ]. Chemical Engineering Science, 2000, 55 : 4233 - 4243.
  • 8Baldyga J, Bourne J R. Comparison of the engulfment and the interaction-by-exchange-with-the-mean mi- cromixing model [ J ]. Chemical Engineering Journal, 1990, 45: 25-31.
  • 9Fang J Z, Lee D J. Micromixing efficiency in static mixer[J]. Chemical Engineering Science, 2001, 56:3797 - 3802.
  • 10董强,聂毅学,张华芹,高正明.连续高速分散混合器内的流体力学性能——Ⅰ.实验研究[J].过程工程学报,2007,7(6):1055-1059. 被引量:2

引证文献1

二级引证文献3

相关作者

内容加载中请稍等...

相关机构

内容加载中请稍等...

相关主题

内容加载中请稍等...

浏览历史

内容加载中请稍等...
;
使用帮助 返回顶部