[1]蔡杰,李奇贺,袁竹林.流化床内细长颗粒\惰性物料混合流化特性研究[J].南京师范大学学报(工程技术版),2011,11(03):044-49.
 Cai Jie,Li Qihe,Yuan Zhulin.Research on Fluidization Characteristics of Mixture of Slender Particles and Inert Materials in a Fluidized Bed[J].Journal of Nanjing Normal University(Engineering and Technology),2011,11(03):044-49.
点击复制

流化床内细长颗粒\惰性物料混合流化特性研究
分享到:

南京师范大学学报(工程技术版)[ISSN:1006-6977/CN:61-1281/TN]

卷:
11卷
期数:
2011年03期
页码:
044-49
栏目:
出版日期:
2011-11-30

文章信息/Info

Title:
Research on Fluidization Characteristics of Mixture of Slender Particles and Inert Materials in a Fluidized Bed
作者:
蔡杰1李奇贺1袁竹林2
( 1. 南京师范大学能源与机械工程学院,江苏南京210042) ( 2. 东南大学能源研究所,江苏南京210096)
Author(s):
Cai Jie1Li Qihe1Yuan Zhulin2
1.School of Energy and Mechanical Engineering,Nanjing Normal University,Nanjing 210042,China
关键词:
细长颗粒( 秸杆) 流化特性细长颗粒\惰性物料混合流化固相分相模型
Keywords:
slender particle of strawfluidization characteristicsmixture of slender particles and inert materialsmodel of part phase of solid
分类号:
TK16
摘要:
将空气和惰性物料(石英砂)处理成连续相,采用欧拉方法计算,将细长颗粒(秸杆)视作离散相,采用拉格朗日方法追踪其运动轨迹,从而建立起固相分相模型.基于此模型数值研究了流化床内细长颗粒\惰性物料混合流化特性.研究发现,在提升管内,由中心向壁面附近区域,细长颗粒的数量浓度有明显的增加;在充分发展区域,细长颗粒的数量浓度分布与提升管入口处浓度分布相似;细长颗粒的取向分布有明显的趋向性,以近于竖直姿态流化运动的细长颗粒的数量百分比明显占优势.
Abstract:
In this paper,air and inert materials are treated as continuous phases and disposed with Euler method,slender particles of straw are considered as discrete phase whose movement tracks are traced with Lagrange method,and so a model of part phase of solid is found. Afterward,the fluidization behaviors of mixture of slender particles and quartz sands in a fluidized bed were simulated. It is found that there are evident axial increases of number concentration of slender particles from the central regions to the near-wall regions,in the fully-developed regions,the number concentration of slender particles is identical to the initial number concentration of slender particles in entrance of the riser,the orientation distribution of fluidized slender particles has distinct tendency,and the number percent of slender particles with small Nutation angle is dominant.

参考文献/References:

[1]王秀丽. 秸杆发电在我国的发展态势分析[J]. 水利电力机械, 2007, 29( 7) : 30-32. Wang Xiuli. Analysis of development prospect of straw power generation in China[J]. Water Conservancy and Electric Power Machinery,2007,29( 7) : 30-32. ( in Chinese)
[2]张广全,董建勋,肖艳. 秸杆直燃发电技术的特点和工艺探索[J]. 东北电力技术, 2007( 8) : 38-40. Zhang Guangquan,Dong Jianxun,Xiao Yan. Exploration of characters and crafts of direct combustion power technology of straw[J]. Northeast Electric Power Technology,2007,28( 8) : 38-40. ( in Chinese)
[3]王振江,周长鲜. 农作物秸杆等燃烧直燃发电技术的几个关键问题[J]. 四川电力技术, 2006, 29( 6) : 82-85. Wang Zhenjiang,Zhou Changxian. Some key problems of direct combustion power technology of straw[J]. Sichuan Electric Power Technology,2006,29( 6) : 82-85. ( in Chinese)
[4]石兴. 纤维悬浮混合层及柱状粒子运动直接模拟的研究[D]. 杭州: 浙江大学航空航天学院, 2002: 13. Shi Xing. Research on the mixing layer of fiber suspensions and direct simulation of cylindrical particles[D]. Hangzhou: School of Aeronautics and Astronautics,Zhejiang University,2002: 13. ( in Chinese)
[5]王叶龙,林建忠,石兴. 柱状粒子间相互作用对沉降运动的影响[J]. 自然科学进展, 2004, 14( 1) : 39-45. Wang Yelong,Lin Jianzhong,Shi Xing. Effects of interaction of cylindrical particles on sedimentation of cylindrical particles [J]. Progress in Natural Science,2004,14( 1) : 39-45.
[6]You Z J,Lin J Z,Shao X M,et al. Stability and drag reduction in transient channel flow of fiber suspension [J]. Chin J Chem Eng,2004,12( 3) : 319-323.
[7]Zhou K,Lin J Z. Numerical research on the 3D fiber orientation distribution in arbitrary planar flows[J]. Prog Nat Sci,2007, 17( 11) : 1 357-1 362.
[8]张凌新. 纤维悬浮流中粒子取向分布及其对本构关系的影响[D]. 杭州: 浙江大学航空航天学院, 2005: 9. Zhang Linxing. The orientation distribution of fiber suspensions and its effect on the constitutive relationship[D]. Hangzhou: School of Aeronautics and Astronautics,Zhejiang University,2005: 9. ( in Chinese)
[9]林建忠,游振江,石兴. 混合层中柱状粒子运动的研究[J]. 工程热物理学报, 2003, 24( 6) : 972-975. Lin Jianzhong,You Zhenjiang,Shi Xing. Research on the motion of cylindrical particles in mixing layers[J]. Journal of Engineering Thermalpahsics, 2003, 24( 6) : 972-975. ( in Chinese)
[10]蔡杰,徐大勇,吴晅,等. 细长颗粒流化过程取向性的数值模拟研究[J]. 中国电机工程学报, 2007, 27( 29) : 34-39. Cai Jie,Xu Dayong,Wu Xuan, et al. Numerical simulation on orientation of slender particles during the process of fluidization [J]. Proceedings of the CSEE, 2007, 27( 29) : 34-39. ( in Chinese)
[11]蔡杰,凡凤仙,吴晅,等. 颗粒间碰撞对气固两相流中细长颗粒流化的取向分布的影响[J]. 中国电机工程学报, 2008, 28( 17) : 66-69. Cai Jie,Fan Fengxian,Wu Xuan,et al. Effects of Inter-particle collisions on the orientation distribution of slender particles in gas-solid flows[J]. Proceedings of the CSEE,2008,28( 17) : 66-69. ( in Chinese)
[12]蔡杰,彭正标,吴晅,等. 壁面约束对气固两相流中细长颗粒流化特性影响的数值研究[J]. 中国电机工程学报, 2008, 28( 23) : 71-74. Cai Jie,Peng Zhengbiao,Wu Xuan,et al. Effects of wall on features of fluidization of slender particles in gas-solid flows [J]. Proceedings of the CSEE,2008,28( 23) : 71-74. ( in Chinese)
[13]Zak G. Estimation of three-dimensional fiber-orientation distribution in short-fiber composites by a two-section method[J]. Journal of Composite Materials,2001,35( 4) : 316-330.

备注/Memo

备注/Memo:
通讯联系人: 蔡杰,博士,讲师,研究方向: 气固两相流动的数值研究. E-mail: nnucj@163. Com
更新日期/Last Update: 2013-03-21