Experimental investigation on particle flow characteristics in spouted bed with longitudinal vortex generator

SHANG Lingyi; WU Feng; MA Xiaoxun

doi:10.11949/j.issn.0438-1157.20171705

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Experimental investigation on particle flow characteristics in spouted bed with longitudinal vortex generator

更新时间：2025-12-10

- Experimental investigation on particle flow characteristics in spouted bed with longitudinal vortex generator
- CIESC Journal Issue 5, Pages: 1923-1930(2018)
- 作者机构：
  
  1. 西北大学化工学院,陕西,西安,710069
  2. 陕西省洁净煤转化工程技术中心,陕西,西安,710069
- 作者简介：
- 基金信息：
- DOI：10.11949/j.issn.0438-1157.20171705
  CLC： Q021.3
- Online First：05 May 2018，
  
  Published：05 May 2018
- 稿件说明：
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SHANG Lingyi, WU Feng, MA Xiaoxun. Experimental investigation on particle flow characteristics in spouted bed with longitudinal vortex generator[J]. CIESC Journal, 2018, (5): 1923-1930.
DOI：

SHANG Lingyi, WU Feng, MA Xiaoxun. Experimental investigation on particle flow characteristics in spouted bed with longitudinal vortex generator[J]. CIESC Journal, 2018, (5): 1923-1930. DOI： 10.11949/j.issn.0438-1157.20171705.

摘要

针对喷动床内环隙区颗粒缺少横/径向运动的特点，通过实验将纵向涡流发生器及纵向涡流效应引入喷动床。采用粒子图像测速技术研究了在内径为152 mm的喷动床内纵向涡流及颗粒设计参数对喷动床内喷射区及环隙区颗粒相径向速度的影响，研究结果表明，纵向涡发生器在扰流元件上方横截面内颗粒相运动出现大量二次涡流，相比较于无纵向涡流扰流件情况，喷动床内的颗粒径向速度得到了显著增加，表明纵向涡发生器能够增强颗粒相在喷射区及环隙区的径向运动能力。在喷动床稳定喷动范围内，颗粒直径及颗粒密度越小，纵向涡流对颗粒相径向运动的强化效果越佳。

Abstract

Longitudinal vortex effect was created by attaching a longitudinal vortex generator to spouted bed so as to improve radial and axial motions of particles in conventional spouted bed. Particle image velocimetry (PIV) was applied to explore effects of longitudinal vortex flow and particle physical properties on radial velocity of particles in injection and annular zones of a 152-mm-diametered spouted bed. The results show that a lot of secondary vortexes appear in the cross section above flow disturbance element of the vortex generator and particle radial velocity is significantly intensified when compared to conventional spouted bed

indicating that the longitudinal vortex generator can enhance radial movement of particle phase in both injection and annular zones. Within the range of stable injection

smaller diameter and lower density of particles have better intensification effect of longitudinal vortex on radial motion of particles.

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