The turbulent behavior of novel free triple-impinging jets with large jet spacing by means of particle image velocimetry

Jun Zhang; Youzhi Liu; Ying Luo

doi:10.1016/j.cjche.2016.04.022

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The turbulent behavior of novel free triple-impinging jets with large jet spacing by means of particle image velocimetry

第25届中国过程控制会议专栏 | Updated：2026-01-06

- The turbulent behavior of novel free triple-impinging jets with large jet spacing by means of particle image velocimetry
- Chinese Journal of Chemical Engineering Issue 6, Pages: 757-766(2016)
- Affiliations：
  
  Shanxi Province Key Laboratory of Higee-oriented Chemical Engineering, North University of China,Taiyuan,China,030051
- Author bio：
- Funds：
- DOI：10.1016/j.cjche.2016.04.022
  CLC：
- Published：2016
- Accepted：
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Jun Zhang, Youzhi Liu, Ying Luo. The turbulent behavior of novel free triple-impinging jets with large jet spacing by means of particle image velocimetry[J]. Chinese Journal of Chemical Engineering, 2016, (6): 757-766.
DOI：

Jun Zhang, Youzhi Liu, Ying Luo. The turbulent behavior of novel free triple-impinging jets with large jet spacing by means of particle image velocimetry[J]. Chinese Journal of Chemical Engineering, 2016, (6): 757-766. DOI： 10.1016/j.cjche.2016.04.022.

摘要

Abstract

A novel reactor that achieves rapid liquid-liquid mixing via free triple-impinging jets (FTIJs) is developed to improve mixing efficiency at unequal flow rates for liquid-liquid reactions. The flow characteristics of FTIJs were investigated using particle image velocimetry (PIV). The instantaneous and mean velocities data at different Reynolds numbers (Re) were analyzed to provide insights into the velocity distributions in FTIJs. The effect of jet spacing on the stagnation points

instantaneous velocity

mean velocity

profiles of the x- and y-components of mean velocity

and turbulent kinetic energy (TKE) distributions of FTIJs were investigated at Re=4100 with a volumetric flow rate ratio of 0.5. The characteristics of the turbulent flows are similar for all jet spacings tested. Two stagnation points are observed

which are independent of jet spacing and are not located in the center of the flow field. However

velocity and TKE distributions are strongly dependent on the jet spacing. Decreasing jet spacing increases the expansion angle and the values of TKE

leading to strong turbulence

improving momentum transfer and mixing efficiency in FTIJs. The present study shows that optimization of the operating parameters is helpful for designing FTIJs.

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