偏心楔形喂料斗卸料过程中颗粒流动特性

doi:10.11949/j.issn.0438-1157.20170852

化工学报 ›› 2018, Vol. 69 ›› Issue (4): 1469-1475.DOI: 10.11949/j.issn.0438-1157.20170852

偏心楔形喂料斗卸料过程中颗粒流动特性

刘义伦^1,2, 刘思琪¹, 赵先琼¹, 刘驰¹, 张喆¹

1. 中南大学机电工程学院, 湖南长沙 410083;
2. 中南大学轻合金研究院, 湖南长沙 410083

收稿日期:2017-07-04 修回日期:2017-10-19 出版日期:2018-04-05 发布日期:2018-04-05
通讯作者: 刘义伦
基金资助:
国家自然科学基金项目（51375500）；长沙市科技计划重点项目（k1508090-11）；中南大学研究生创新项目（2017zzts411）。

Flow characteristics of granule discharged from eccentric wedge-shaped feed hopper

LIU Yilun^1,2, LIU Siqi¹, ZHAO Xianqiong¹, LIU Chi¹, ZHANG Zhe¹

1. College of Mechanical and Electrical Engineering, Central South University, Changsha 410083, Hunan, China;
2. Light Alloy Research Institute, Central South University, Changsha 410083, Hunan, China

Received:2017-07-04 Revised:2017-10-19 Online:2018-04-05 Published:2018-04-05
Supported by:
supported by the National Natural Science Foundation of China(51375500), the Science and Technology Program of Changsha Municipality(k1508090-11) and the Postgraduate Innovation Project of Central South University(2017zzts411).

摘要/Abstract

摘要：

采用三维离散单元法，研究了偏心楔形喂料斗中不同粒径颗粒卸料过程的流场分布，建立了适用于偏心楔形喂料斗的整体流系数模型，分析了料斗卸料流型以及卸料流型与卸料质量流率的相关性，并通过实验验证了离散元模型的可靠性。结果表明：偏心楔形喂料斗内颗粒流场分布以靠近喂料管口区域为高速区，并呈辐射状朝远离垂直壁面端的料斗上部低速区过渡，高速区颗粒流场的整体一致性好，低速区颗粒流场呈局部涡流状；颗粒粒径增大，颗粒整体流动性变差，高速区域范围减小，低速区域范围增大，过渡区域变模糊；当颗粒粒径不大于10 mm时，整体流系数与颗粒粒径呈线性负相关，卸料质量流率与整体流系数呈线性正相关。

关键词: 数值模拟, 实验验证, 颗粒流, 偏心, 卸料, 颗粒粒径

Abstract:

Flow field distributions of discharging various sized granular materials from wedge-shaped feed hopper was numerically simulated using three-dimensional discrete element method. A mathematical model of mass flow index (MFI) was proposed for the wedge-shaped feed hopper. The discharge flow pattern and its relationship with discharge mass flow rate was analyzed, and model reliability was verified experimentally. The results show that granular flow field in the hopper has a high velocity region near feed pipe outlet and is radially attenuated towards low velocity region at the upper hopper which is away from vertical wall and feed pipe. The flow direction of particles in high velocity region was well consistent, whereas granular flow in low velocity region exhibited local vortices. With the increase of particle size, overall flowability of particles in the hopper decreased, which high velocity region shrinked, low velocity region enlarged, and transition region became obscure, hence both MFI and discharge mass flow rate were decreased. When particle size was no more than 10 mm, MFI was negatively linearly related to particle size, but was positively linearly to discharge mass flow rate.

Key words: numerical simulation, experimental validation, granular flow, eccentric, discharge, particle size

中图分类号:

TQ051

刘义伦, 刘思琪, 赵先琼, 刘驰, 张喆. 偏心楔形喂料斗卸料过程中颗粒流动特性[J]. 化工学报, 2018, 69(4): 1469-1475.

LIU Yilun, LIU Siqi, ZHAO Xianqiong, LIU Chi, ZHANG Zhe. Flow characteristics of granule discharged from eccentric wedge-shaped feed hopper[J]. CIESC Journal, 2018, 69(4): 1469-1475.

参考文献 30

[1]	VIDAL P, GALLEGO E, GUAITA M, et al. Finite element analysis under different boundary conditions of the filling of cylindrical steel silos having an eccentric hopper[J]. Journal of Constructional Steel Research, 2008, 64(4):480-492.
[2]	YU Y, SAXÉN H. Segregation behavior of particles in a top hopper of a blast furnace[J]. Powder Technology, 2014, 262:233-241.
[3]	KETTERHAGEN W R, HANCOCK B C. Optimizing the design of eccentric feed hoppers for tablet presses using DEM[J]. Computers & Chemical Engineering, 2010, 34(7):1072-1081.
[4]	LIU S D, ZHOU Z Y, ZOU R P, et al. Flow characteristics and discharge rate of ellipsoidal particles in a flat bottom hopper[J]. Powder Technology, 2014, 253:70-79.
[5]	ANAND A, CURTIS J S, WASSGREN C R, et al. Predicting discharge dynamics from a rectangular hopper using the discrete element method (DEM)[J]. Chemical Engineering Science, 2008, 63(24):5821-5830.
[6]	HÖHNER D, WIRTZ S, SCHERER V. A numerical study on the influence of particle shape on hopper discharge within the polyhedral and multi-sphere discrete element method[J]. Powder Technology, 2012, 226:16-28.
[7]	许鹏凯, 段学志, 钱刚, 等. 楔形中心和偏心料仓中壁面摩擦系数对卸料速率的影响[J]. 化工学报, 2015, 66(3):880-887. XU P K, DUAN X Z, QIAN G, et al. Granular discharge from concentric and eccentric wedge shaped hoppers:effect of wall friction coefficient on discharge rate[J]. CIESC Journal, 2015, 66(3):880-887.
[8]	张西良, 张建, 李萍萍, 等. 粉体物料流动性仿真分析[J]. 农业机械学报, 2008, 39(8):196-198. ZHANG X L, ZHANG J, LI P P, et al. Simulation analysis for particle material flow[J]. Transactions of the Chinese Society for Agricultural Machinery, 2008, 39(8):196-198.
[9]	JENIKE A W. Gravity flow of bulk solids, bulletin No. 108[J]. Bulletin of the University of Utah, 1961, 52(29):1-32.
[10]	JENIKE A W. Storage and flow of solids, bulletin No. 123[J]. Bulletin of the University of Utah, 1964, 53(26):229-236.
[11]	谭援强, 肖湘武, 郑军辉, 等. 锥形改流体下部孔径对筒仓卸料流态的影响[J]. 农业工程学报, 2016, 32(19):82-87. TAN Y Q, XIAO X W, ZHENG J H, et al. Effect of outlet diameter of cone-in-cone insert on silo flow pattern[J]. Transactions of the Chinese Society for Agricultural Machinery, 2016, 32(19):82-87.
[12]	谭援强, 郑军辉, 张浩, 等. 基于离散元法的锥形筒仓中颗粒流体的数学模拟[J]. 过程工程学报, 2015, 15(6):916-922. TAN Y Q, ZHENG J H, ZHANG H, et al. Mathematical simulation of granular fluid in conical silo based on discrete element method[J]. The Chinese Journal of Process Engineering, 2015, 15(6):916-922.
[13]	GONZÁLEZ-MONTELLANO C, GALLEGO E, RAMÍREZ-GÓMEZ Á, et al. Three dimensional discrete element models for simulating the filling and emptying of silos:analysis of numerical results[J]. Computers & Chemical Engineering, 2012, 40(40):22-32.
[14]	MAGALHÃES F G R, ATMAN A P F, MOREIRA J G, et al. Analysis of the velocity field of granular hopper flow[J]. Granular Matter, 2015, 18(2):1-7.
[15]	WU J T, CHEN J Z, YANG Y R. Microscopic analysis of particle flow in moving bed[J]. Journal of Zhejiang University, 2006, 40(5):863-864.
[16]	XU P, DUAN X, QIAN G, et al. Dependence of wall stress ratio on wall friction coefficient during the discharging of a 3D rectangular hopper[J]. Powder Technology, 2015, 284:326-335.
[17]	WANG P, ZHU L, ZHU X. Flow pattern and normal pressure distribution in flat bottom silo discharged using wall outlet[J]. Powder Technology, 2016, 295:104-114.
[18]	GONZÁLEZ-MONTELLANO C, RAMÍREZ Á, GALLEGO E, et al. Validation and experimental calibration of 3D discrete element models for the simulation of the discharge flow in silos[J]. Chemical Engineering Science, 2011, 66(21):5116-5126.
[19]	KRUGGEL-EMDEN H, RICKELT S, WIRTZ S, et al. A numerical study on the sensitivity of the discrete element method for hopper discharge[J]. Journal of Pressure Vessel Technology, 2009, 131(3):31211.
[20]	KETTERHAGEN W R, CURTIS J S, WASSGREN C R, et al. Modeling granular segregation in flow from quasi-three-dimensional, wedge-shaped hoppers[J]. Powder Technology, 2008, 179(3):126-143.
[21]	KETTERHAGEN W R, CURTIS J S, WASSGREN C R, et al. Predicting the flow mode from hoppers using the discrete element method[J]. Powder Technology, 2009, 195(1):1-10.
[22]	CUNDALL P A, STRACK O D L. A discrete numerical model for granular assemblies[J]. Geotechnique, 1979, 29(1):47-65.
[23]	JOHNSON K L. Contact mechanics[J]. Journal of Tribology, 1985, 108(4):464.
[24]	MINDLIN R D, DERESIEWICA H. Elastic spheres in contact under varying oblique forces[J]. Journal of Applied Mechanics, 1953, 20(3):327-344.
[25]	中南大学. 一种多功能烟花亮珠造粒安全配料机构:2016214062845[P]. 2017-06-27. Central South University. A multi-functional fireworks beads granulation safety batching mechanism:2016214062845[P]. 2017-06-27.
[26]	CHEN H, ZHAO X Q, XIAO Y G, et al. Radial mixing and segregation of granular bed bi-dispersed both in particle size and density within horizontal rotating drum[J]. Transactions of Nonferrous Metals Society of China, 2016, 26(2):527-535.
[27]	CHEN H, LIU Y L, ZHAO X Q, et al. Numerical investigation on angle of repose and force network from granular pile in variable gravitational environments[J]. Powder Technology, 2015, 283:607-617.
[28]	陈辉, 肖友刚, 赵先琼, 等. 回转窑内二元颗粒物料的径向混合[J]. 工程科学学报, 2016, 38(2):194-199. CHEN H, XIAO Y G, ZHAO X Q, et al. Transverse mixing of binary solid materials in a rotating kiln[J]. Chinese Journal of Engineering, 2016, 38(2):194-199.
[29]	FUNG W W S, KWAN A K H. Effect of particle interlock on flow of aggregate through opening[J]. Powder Technology, 2014, 253:198-206.
[30]	陶贺, 钟文琪, 张勇, 等. 异形混合非球形颗粒在移动床中流动特性的数值模拟[J]. 科学通报, 2015, 60(27):2667-2675. TAO H, ZHONG W, ZHANG Y, et al. Numerical simulation of flow characteristics for non-spherical particle mixture flowing in moving bed[J]. Chinese Science Bulletin, 2015, 60(27):2667-2675.

偏心楔形喂料斗卸料过程中颗粒流动特性

Flow characteristics of granule discharged from eccentric wedge-shaped feed hopper

PDF (PC)

可视化

被引次数

摘要/Abstract

引用本文

使用本文

参考文献 30

相关文章 15

编辑推荐

Metrics

本文评价

[1]	叶展羽, 山訸, 徐震原. 用于太阳能蒸发的折纸式蒸发器性能仿真[J]. 化工学报, 2023, 74(S1): 132-140.
[2]	张义飞, 刘舫辰, 张双星, 杜文静. 超临界二氧化碳用印刷电路板式换热器性能分析[J]. 化工学报, 2023, 74(S1): 183-190.
[3]	王志国, 薛孟, 董芋双, 张田震, 秦晓凯, 韩强. 基于裂隙粗糙性表征方法的地热岩体热流耦合数值模拟与分析[J]. 化工学报, 2023, 74(S1): 223-234.
[4]	宋嘉豪, 王文. 斯特林发动机与高温热管耦合运行特性研究[J]. 化工学报, 2023, 74(S1): 287-294.
[5]	张思雨, 殷勇高, 贾鹏琦, 叶威. 双U型地埋管群跨季节蓄热特性研究[J]. 化工学报, 2023, 74(S1): 295-301.
[6]	何松, 刘乔迈, 谢广烁, 王斯民, 肖娟. 高浓度水煤浆管道气膜减阻两相流模拟及代理辅助优化[J]. 化工学报, 2023, 74(9): 3766-3774.
[7]	邢雷, 苗春雨, 蒋明虎, 赵立新, 李新亚. 井下微型气液旋流分离器优化设计与性能分析[J]. 化工学报, 2023, 74(8): 3394-3406.
[8]	韩晨, 司徒友珉, 朱斌, 许建良, 郭晓镭, 刘海峰. 协同处理废液的多喷嘴粉煤气化炉内反应流动研究[J]. 化工学报, 2023, 74(8): 3266-3278.
[9]	程小松, 殷勇高, 车春文. 不同工质在溶液除湿真空再生系统中的性能对比[J]. 化工学报, 2023, 74(8): 3494-3501.
[10]	刘文竹, 云和明, 王宝雪, 胡明哲, 仲崇龙. 基于场协同和耗散的微通道拓扑优化研究[J]. 化工学报, 2023, 74(8): 3329-3341.
[11]	洪瑞, 袁宝强, 杜文静. 垂直上升管内超临界二氧化碳传热恶化机理分析[J]. 化工学报, 2023, 74(8): 3309-3319.
[12]	闫琳琦, 王振雷. 基于STA-BiLSTM-LightGBM组合模型的多步预测软测量建模[J]. 化工学报, 2023, 74(8): 3407-3418.
[13]	黄可欣, 李彤, 李桉琦, 林梅. 加装旋转叶轮T型通道流场的模态分解[J]. 化工学报, 2023, 74(7): 2848-2857.
[14]	史方哲, 甘云华. 超薄热管启动特性和传热性能数值模拟[J]. 化工学报, 2023, 74(7): 2814-2823.
[15]	朱兴驰, 郭志远, 纪志永, 汪婧, 张盼盼, 刘杰, 赵颖颖, 袁俊生. 选择性电渗析镁锂分离过程模拟优化[J]. 化工学报, 2023, 74(6): 2477-2485.