Semianalytical Characterization of Turbulence from Radial Impellers, with Experimental and Numerical Validation

被引：11

作者：

Ben-Nun, Ronen ^{[1
]}

Sheintuch, Moshe ^{[1
]}

Kysela, Bohus ^{[2
]}

Konfrst, Jiri ^{[2
]}

Fort, Ivan ^{[3
]}

机构：

[1] Technion Israel Inst Technol, Dept Chem Engn, IL-3200003 Haifa, Israel

[2] Inst Hydrodynam AS CR, Vvi, Prague, Czech Republic

[3] Czech Tech Univ, Fac Mech Engn, Dept Proc Engn, CR-16635 Prague, Czech Republic

来源：

AICHE JOURNAL | 2015年 / 61卷 / 04期

关键词：

turbulent jet; mixing; radial impeller; stirred tank; Rushton turbine; STIRRED-TANK; RUSHTON TURBINE; CFD SIMULATION; LIQUID HOMOGENIZATION; SOLID SUSPENSION; FLOW; PREDICTIONS; STREAM; JET; HYDRODYNAMICS;

D O I：

10.1002/aic.14723

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

Based on conventional turbulent jet theory and the general theoretical framework of scalar dispersion in turbulent shear flows, a novel formulation of the radial impeller's jet in stirred tanks is introduced. Whereas previous studies considered the impeller's jet as developed, it is now comprised of two separate spatial regions along the radial axis: the zone of flow establishment (ZFE) and the zone of established flow (ZEF). This formulation is accompanied with semi-analytical expressions for the prediction of turbulent key parameters including the random part of k and epsilon in the ZFE. The new theoretical framework is validated both with laser Doppler anemometry measurements and with 3-D numerical simulations using the standard k-epsilon turbulent model. (C) 2015 American Institute of Chemical Engineers

引用

页码：1413 / 1426

页数：14

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