A Contraction-expansion Helical Mixer in the Laminar Regime

梁栋; 张淑芬

doi:10.1016/S1004-9541(14)60035-5

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A Contraction-expansion Helical Mixer in the Laminar Regime

流体力学与传递现象 | Updated：2026-01-06

- A Contraction-expansion Helical Mixer in the Laminar Regime
- Chinese Journal of Chemical Engineering Vol. 22, Issue 3, Pages: 261-2661004-954160035-5(2014)
- Affiliations：
  
  State Key Laboratory of Fine Chemicals, Dalian University of Technology,Dalian,China,116024
- Author bio：
- Funds：
- DOI：10.1016/S1004-9541(14)60035-5
  CLC：
- Published：2014
- Accepted：
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LIANG Dong, ZHANG Shufen. A Contraction-expansion Helical Mixer in the Laminar Regime[J]. Chin.J.Chem.Eng., 2014, 22(3): 261-266.
DOI：

LIANG Dong, ZHANG Shufen. A Contraction-expansion Helical Mixer in the Laminar Regime[J]. Chin.J.Chem.Eng., 2014, 22(3): 261-266. DOI： 10.1016/S1004-9541(14)60035-5.

摘要

Abstract

A contraction-expansion helical mixer which combines several features

viz. helical pipes for induction of secondary flows and sudden expansion and contraction array for expansion vortices

has been designed to enhance flow mixing. A fast competitive-consecutive diazo coupling reaction is used to test the mixing efficiency of contraction-expansion helical mixer. Furthermore

an image processing technique is applied for data visualization and monitoring the extent of mixing. The mixing performance is found to be superior in comparison to the regular helical mixer in the range of Reynolds number from 170 to 1540. Moreover

the mixing time of contraction-expansion helical mixer was found to be reduced by more than 25% compared to the regular helical pipe. Finally

a simple correlation is proposed for predicting the mixing time.

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