[1]肖美添,刘华信,朱艳.工业炉旋风预燃器煤粉颗粒运动轨迹[J].华侨大学学报(自然科学版),2001,22(3):303-308.[doi:10.3969/j.issn.1000-5013.2001.03.018]
　Xiao Meitian,Liu Huaxin,Zhu Yan.Kinematic Trajectory of Pulverized Coal Particles in the Cyclone Precombustor of Industrial Furnace[J].Journal of Huaqiao University(Natural Science),2001,22(3):303-308.[doi:10.3969/j.issn.1000-5013.2001.03.018]
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工业炉旋风预燃器煤粉颗粒运动轨迹()
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《华侨大学学报（自然科学版）》[ISSN:1000-5013/CN:35-1079/N]

卷:
第22卷
期数:
2001年第3期
页码:
303-308
栏目:
出版日期:
2001-07-20

文章信息/Info

Title:
Kinematic Trajectory of Pulverized Coal Particles in the Cyclone Precombustor of Industrial Furnace
文章编号:
1000-5013(2001)03-0303-06
作者:
肖美添; 刘华信; 朱艳
华侨大学材料科学与工程学院, 泉州362011
Author(s):
Xiao Meitian;  Liu Huaxin;  Zhu Yan
College of Mater. Sci. & Eng., Huaqiao Univ., 362011, Quanzhou
关键词:
旋风;  预燃器;  颗粒运动轨迹;  数值计算
Keywords:
cyclone;  precombustor;  kinematic trajectory of particle;  numerical solution
分类号:
TQ02
DOI:
10.3969/j.issn.1000-5013.2001.03.018
摘要:
在预燃器冷态模型流场内,考虑气流曳引力、重力和 Magnus旋转升力,建立颗粒的运动微分方程,并考察颗粒与壁面相互碰撞过程 .采用龙格库塔法进行数值求解,得到了不同粒径的颗粒在 4种流场工况中的运动和停留时间 .经计算,还可得出以下结论 .(1)颗粒的运动轨迹主要受气相流场分布、颗粒粒径和颗粒初始速度等因素的影响 .(2 )颗粒粒径较小时,可以忽略升力和重力的影响 .但大颗粒与壁面碰撞后,必须连同考虑颗粒旋转及 Magnus升力的作用 .(3)选择合适的入口一二次风量比 (Q2 /Q1)和颗粒的初始速度,可延长颗粒在预燃器内的停留时间,能分离大于 30μm的颗粒 .该结果能为粉煤旋风预燃器的优化设计提供理论依据
Abstract:
For reflecting kinematics of pulverized coal particles in the flow field of the cold state model of cyclone precombuster, a differential equation is formulated and solved numerically by adopting Runge Kutta method. In the equation, draw force of gas flow and gravity and Megnus lift force are taken into account. By investigating the effect from collision of partlcles with wall surface, kinematic trajectory and retention time of particles of different sizes in four operating modes are obtained. The following conclusions can also be obtained through computation:(a) Kinematic trajectory of particles is mainly influenced by such factors as distribution of gas phase flow field, particle size and initial speed of particles. (b) For the smaller particles, the effect of lift force and gravity can be ignored; but for the larger particles and those collided with wall surface in particular, particle rotation and action of Magnus lift force must be considered altogether. (c) The retention time of particle in cyclone precombustor can be prolonged and particles larger than 30 μm can be separated by choosing appropriate ratio of primary air quantity and secondary ones at the inlet ( Q 2/Q 1 ) and appropriate initial speed of particles, These results will provide the optimized design of cyclone precombustor for pulverized coal with theoretical basis.

参考文献/References:

[1] 张永安, 李春生. 煤粉旋风燃烧器颗粒运动轨迹数学模拟实验研究 [J]. 冶金能源, 1993(1):47-52.
[2] 何屏, 蔡乔生. 旋风燃烧器冷态模型颗粒运动轨迹计算 [J]. 昆明理工大学学报, 1996(1):40-43.
[3] 刘华信, 肖美添, 朱艳. 工业炉煤粉旋风预燃器的气相流场特性 [J]. 华侨大学学报(自然科学版), 2000(3):313-318.doi:10.3969/j.issn.1000-5013.2000.03.020.
[4] 肖美添. 旋风气固两相流动特性的研究 [D]. 厦门:华侨大学, 1999.11-36.
[5] 岑可法, 樊建人. 工程气固两相流动的理论及计算 [M]. 杭州:浙江大学出版社, 1990.303-401.
[6] Sommerfeld M, Qiu H H. Characterization of particle-laden confined swirling flows by phase-doppler anemometry and numerical calculation [J]. International Journal of Multiphase Flow, 1993(6):1093-1127.doi:10.1016/0301-9322(93)90080-E.

相似文献/References:

[1]刘华信,肖美添,朱艳,等.工业炉煤粉旋风预燃器的气相流场特性[J].华侨大学学报(自然科学版),2000,21(3):313.[doi:10.3969/j.issn.1000-5013.2000.03.020]
　Liu Huaxin,Xiao Meitian,Zhu Yan,et al.A Study on the Charateristic Gas Phase Flow within a Pulverized Coal Cyclone Precombustor for the Use of Industrial Furnace[J].Journal of Huaqiao University(Natural Science),2000,21(3):313.[doi:10.3969/j.issn.1000-5013.2000.03.020]

备注/Memo

备注/Memo:
福建省自然科学基金资助项目
更新日期/Last Update: 2014-03-23