Cluster frequency and existence time in dense transport bed

ZENG Xin; YANG Shaojun; WANG Shengdian; ZHAO Kai; XU Xiang; XIAO Yunhan

doi:10.3969/j.issn.0438-1157.2013.05.016

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Cluster frequency and existence time in dense transport bed

更新时间：2025-12-10

- Cluster frequency and existence time in dense transport bed
- CIESC Journal Issue 5, Pages: 1614-1620(2013)
- 作者机构：
  
  1. 中国科学院能源动力研究中心,北京,100190
  2. 中国科学院先进能源动力重点实验室(工程热物理研究所),北京,100190
- 作者简介：
- 基金信息：
- DOI：10.3969/j.issn.0438-1157.2013.05.016
  CLC： Q021TQ022.3
- Online First：05 May 2013，
  
  Published：05 May 2013
- 稿件说明：
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ZENG Xin, YANG Shaojun, WANG Shengdian, et al. Cluster frequency and existence time in dense transport bed[J]. CIESC Journal, 2013, (5): 1614-1620.
DOI：

ZENG Xin, YANG Shaojun, WANG Shengdian, et al. Cluster frequency and existence time in dense transport bed[J]. CIESC Journal, 2013, (5): 1614-1620. DOI： 10.3969/j.issn.0438-1157.2013.05.016.

摘要

在内径0.102 m、高17 m的密相输运床冷态实验台上

以石英砂(属Geldart B类颗粒)作为循环物料

对光纤探针在表观气速8.2~11.2 m·s-1

固体循环流率139~530 kg·m-2·s-1下获得的瞬态信号

采用小波分析的方法研究了团聚物频率、团聚物持续时间。结果表明:提升管边壁与底部区域更易形成大尺度团聚物

径向上团聚物频率中心高边壁低

而团聚物持续时间中心短边壁长。轴向上提升管底部团聚物频率低、持续时间长。团聚物频率随表现气速增大而增大

而团聚物持续时间随表现气速增大而缩短

提升管底部团聚物频率随固体循环流率增大而降低

团聚物持续时间随固体循环流率增大而变长。

Abstract

Cluster characteristics(cluster frequency and cluster existence time)were investigated with wavelet analysis in a cold dense transport bed with Geldart B particle using a fiber optic probe.The superficial gas velocities and solids circulating rate were in the range of 8.2-11.2 m穝-1 and 139-530 kg穖-2穝-1

respectively.The results indicated that large scale clusters were easier to form in the near wall and bottom zone than in the center and the top zone of the riser

respectively.Cluster frequency decreased from center to wall

while cluster existence time increased from center to wall.Cluster frequency increased with increasing superficial gas velocity

while cluster existence time decreased with increasing superficial gas velocity.At the riser bottom

cluster frequency decreased with increasing solids circulating rate while cluster existence time increased with increasing solids circulating rates.

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