EXPERIMENTAL STUDY ON TURNBULENT DILUTE GAS-PARTICLE FLOWS OF DIFFERENT SWIRLING INTENSITY

LIU Zhaohui; ZHENG Chuguang; WANG Hanfeng

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EXPERIMENTAL STUDY ON TURNBULENT DILUTE GAS-PARTICLE FLOWS OF DIFFERENT SWIRLING INTENSITY

更新时间：2025-12-10

- EXPERIMENTAL STUDY ON TURNBULENT DILUTE GAS-PARTICLE FLOWS OF DIFFERENT SWIRLING INTENSITY
- CIESC Journal Issue 6, (2001)
- 作者机构：
  
  华中科技大学煤燃烧国家重点实验室
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Online First：25 June 2001，
  
  Published：25 June 2001
- 稿件说明：
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LIU Zhaohui, ZHENG Chuguang, WANG Hanfeng. EXPERIMENTAL STUDY ON TURNBULENT DILUTE GAS-PARTICLE FLOWS OF DIFFERENT SWIRLING INTENSITY[J]. CIESC Journal, 2001, (6).
DOI：

LIU Zhaohui, ZHENG Chuguang, WANG Hanfeng. EXPERIMENTAL STUDY ON TURNBULENT DILUTE GAS-PARTICLE FLOWS OF DIFFERENT SWIRLING INTENSITY[J]. CIESC Journal, 2001, (6). DOI：

摘要

利用相位多普勒仪 (PDPA)系统研究了不同旋流数下突扩旋风筒内气粒两相湍流特性的变化规律 .在相同的进口形状和总风量的条件下

分别测量了旋流数为 0、 0 .5和 1.0时气相和颗粒相的轴向、切向的平均速度和脉动速度 .结果表明 :旋流数的变化对轴向速度的分布和切向速度的似固核 -位涡结构

以及两相脉动速度和两相湍流各向异性都有比较明显的规律性影响 ;总体上

旋流对两相湍流起抑制作用

但随旋流数的增大

两相湍流脉动及其各向异性都有先减弱

后来又有所增大的趋势

Abstract

The dilute gas-particle flows in a cyclone chamber with axial and tangential inlers of different swirl numbers were studied by using a Phase-Doppler Particle Anemometer(PDPA).The measured two-phase axial

tangential time-averaged velocities and fluctuation velocities under the same overall air flow-rate

with swirl numbers of 0

0.5 and 1.0 respectively

are reported here.The results show that the swirl intensity has a remarkable effect on the profiles of axial velocity

the vortex structure of tangential velocity

the two-phase fluctuation velocity and the anisotropy of turbulence.The swirl can generally reduce two-phase turbulence.The intensity of turbulent fluctuation and its anisotropy decrease significantly with increasing swirl number at first

and they increase a little while the swirl number exceeds 1.

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