Flow and mixing characteristics of granular jet exposed to central and annular air jet

LÜ Hui; WANG Haiyong; LI Dalong; CAO Guiping; LIU Haifeng; GUO Yanglong

doi:10.11949/j.issn.0438-1157.20150088

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Flow and mixing characteristics of granular jet exposed to central and annular air jet

更新时间：2025-11-26

- Flow and mixing characteristics of granular jet exposed to central and annular air jet
- CIESC Journal Vol. 66, Issue 7, Pages: 2411-2419(2015)
- 作者机构：
  
  1. 华东理工大学化学工程联合国家重点实验室,上海,200237
  2. 华东理工大学煤气化与能源化工教育部重点实验室,上海,200237
  3. 华东理工大学工业催化研究所,上海,200237
- 作者简介：
- 基金信息：
- DOI：10.11949/j.issn.0438-1157.20150088
  CLC： Q021.1
- Online First：05 July 2015，
  
  Published：05 July 2015
- 稿件说明：
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LÜ Hui, WANG Haiyong, LI Dalong, et al. Flow and mixing characteristics of granular jet exposed to central and annular air jet[J]. CIESC Journal, 2015, 66(7): 2411-2419.
DOI：

LÜ Hui, WANG Haiyong, LI Dalong, et al. Flow and mixing characteristics of granular jet exposed to central and annular air jet[J]. CIESC Journal, 2015, 66(7): 2411-2419. DOI： 10.11949/j.issn.0438-1157.20150088.

摘要

采用PIV测速系统和高速摄像仪对同轴气固两相射流进行了实验研究

着重考察了同轴射流结构和旋流对颗粒流动与混合特性的影响。结果表明

环形气流作用下颗粒获得的轴向速度比相同条件下中心气流作用下的颗粒轴向速度大

且气固两相的混合效果更佳

在这两种同轴射流结构下

颗粒的轴向速度仅在靠近喷嘴的横截面上分布较为均匀。而旋流

特别是强旋的引入不仅可以促进远场区颗粒速度的均布

而且能够有效地改善两相混合效果。

Abstract

An experimental study was conducted on gas-particle coaxial jets by PIV and high-speed camera. The effects of the coaxial jets form and the addition of swirl on the flow and mixing characteristics of particle phase were investigated. The results showed that the axial velocity of the granular jet exposed to an annular air jet was higher than that of the granular jet with a central air jet. In addition

the mixing effect of the case with an annular air jet was found to be much better. For the two coaxial jets forms

the particle axial velocity profile in the cross-section close to the nozzle was more even. The addition of swirl

especially for the strong swirl

could not only achieve the uniform distribution of the particle axial velocity in the far field

but also improve the mixing effect of the two-phase efficiently.

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