[1]魏新利,张海红,王定标,等.旋风分离器内颗粒轨迹的数值模拟[J].郑州大学学报(工学版),2004,25(03):14-17,59.[doi:10.3969/j.issn.1671-6833.2004.03.004]
　WEI Xinli,ZHANG Haihong,Wang Dingping,et al.Numerical simulation of particle trajectories within a cyclone[J].Journal of Zhengzhou University (Engineering Science),2004,25(03):14-17,59.[doi:10.3969/j.issn.1671-6833.2004.03.004]

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旋风分离器内颗粒轨迹的数值模拟()

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《郑州大学学报(工学版)》[ISSN:1671-6833/CN:41-1339/T]

卷:

25

期数:

2004年03期

页码:

14-17,59

栏目:

出版日期:

1900-01-01

文章信息/Info

Title:

Numerical simulation of particle trajectories within a cyclone

作者:

魏新利; 张海红; 王定标; 等.

郑州大学化工学院,河南,郑州,450002, 郑州大学化工学院,河南,郑州,450002, 郑州大学化工学院,河南,郑州,450002, 郑州大学化工学院,河南,郑州,450002

Author(s):

WEI Xinli; ZHANG Haihong; Wang Dingping; etc

关键词:

旋风分离器;  数值模拟;  耦合;  轨迹

Keywords:

cyclone;  numerical simulation;  coupling;  Trajectory

DOI:

10.3969/j.issn.1671-6833.2004.03.004

文献标志码:

A

摘要:

采用数值模拟的方法研究旋风分离器内的颗粒运动:对单相流场采用湍流各向异性的雷诺应力模型,对气、固两相流场采用相间耦合的随机轨道模型;通过描述颗粒的运动轨迹,揭示了颗粒在旋风分离器中运动的物理机制.结果表明:颗粒的运动轨迹比较复杂,且带有很大的随机性;尤其是小粒径颗粒,受气流湍动影响显著,即使是粒径、入射位置相同,其运动轨迹也各不相同,最终的位置也不同;小粒径颗粒更容易受二次涡流影响,从而降低分离器的效率;另外,还模拟出了上灰环、排气管短路流及排尘口返混等影响分离效率的几种现象,为进一步研究旋风分离器的分离机理理论及实验研究打下基础.

Abstract:

The particle motion in the cyclone was studied by numerical simulation: the Reynauds stress model of turbulent anisotropy was used for the single-phase flow field, and the random orbital model with phase-coupled phase coupling was adopted for the gas-solid two-phase flow field. By describing the motion trajectory of particles, the physical mechanism of particle movement in the cyclone separator is revealed. The results show that the motion trajectories of particles are complex and have great randomness. In particular, small particle size particles are significantly affected by air turbulence, even if the particle size and incidence position are the same, their motion trajectories are different, and the final position is also different; Particles with small particle sizes are more susceptible to secondary eddy currents, which reduces the efficiency of the separator; In addition, several phenomena affecting the separation efficiency, such as upper ash ring, exhaust pipe short-circuit flow and dust outlet remixing, are also simulated, which lays a foundation for further research on the separation mechanism theory and experimental research of cyclone separator.

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