THE INFLUENCE OF VISCOSITY ON MIXING IN JET REACTORS

被引:30
作者
BALDYGA, J [1 ]
BOURNE, JR [1 ]
GHOLAP, RV [1 ]
机构
[1] ETH ZENTRUM,TECH CHEM LAB,CH-8092 ZURICH,SWITZERLAND
关键词
D O I
10.1016/0009-2509(95)00049-B
中图分类号
TQ [化学工业];
学科分类号
0817 ;
摘要
A free turbulent jet discharging into a tank is a simple device and can develop local turbulent energy dssipation rates on the order of 10(3)-10(4) W kg(-1), which are suitable for fast reactions and drop dispersion. Parameter estimation For an earlier model of micromixing and mesomixing has been updated to include further information on turbulence in the initial developing region of the jet. Measured product distributions for fast chemical reactions, employing various initial jet velocities, viscosities and feed times for semi-batch operation, showed two limiting regimes where either micromixing or mesomixing was controlling. The updated model described these measurements satisfactorily, as well as some earlier drop breakup experiments.
引用
收藏
页码:1877 / 1880
页数:4
相关论文
共 10 条
[1]  
Antonia, Satyaprakash, Hussain, Measurements of dissipation rate and some other characteristics of turbulent plane and circular jets, Phys. Fluids, 23, (1980)
[2]  
Baldyga, Bourne, Zimmermann, Investigation of mixing in jet reactors using fast, competitive-consecutive reactions, Chem. Engng Sci., 49, (1994)
[3]  
Boguslawski, Popiel, Flow structure of the free round turbulent jet in the initial region, J. Fluid Mech., 90, (1979)
[4]  
Bourne, Kut, Lenzner, An improved reaction system to investigate micromixing in high-intensity mixers, Ind. Engng Chem. Res., 31, (1992)
[5]  
Corrsin, The isotropic turbulent mixer Part 2 Arbitrary Schmidt number, AIChE Journal, 10, (1964)
[6]  
Friehe, VanAtta, Gibson, Jet turbulence: dissipation rate measurements and correlations, AGARD Conference Proceedings Turbulent Shear Flows, (1972)
[7]  
Gholap, Petrozzi, Bourne, Influence of viscosity on product distribution of fast competitive chemical reactions, Chem. Engng Technol., 17, (1994)
[8]  
Hill, Measurement of local entrainment in the initial region of axisymmetric turbulent air jets, Journal of Fluid Mechanics, 51, (1972)
[9]  
Liepmann, Gharib, The role of stream wise vorticity in the near-field entrainment of round jets, J. Fluid Mech., 245, (1992)
[10]  
Panchapakesan, Lumley, Turbulence measurements in axisymmetric jets of air and helium. Part 1. Air jets, J. Fluid Mech., 246, (1993)