散料颗粒密相气力输送动力参数优化及压降特性分析
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摘要
为了降低管内压降,减小散料颗粒群非均匀悬浮输送所产生的湍流强度,以欧拉双流体模型为基础,应用流体力学Fluent仿真软件,建立粘度系数μ_s,k_(in)、曳力系数β在Syamlal-O’Brien和Gidaspow两种模型下形成的4种组合模型,并与实验结果进行对比,选出Gidaspow与Gidaspow组合模型作为气力输送计算模型,进而分析影响输送过程中压降变化的主要动力参数:粘度系数、曳力系数和碰撞恢复系数e_(ss),探讨前两者在该模型组合时管内压力的分布规律,得出碰撞恢复系数和入口风速v_g对管内压降变化特性的影响。
For purpose of reducing the pipe pressure drop and decreasing the turbulence intensity incurred by conveying the powder particle group in inhomogeneous suspension,through basing on the Eulerian two-fluid turbulence model,applying Fluent software and establishing 4 combined models of viscosity coefficient (μ_s,k_(in)) and drag coefficient (β) in Syamlal-O'Brien and Gidaspow models was implemented and compared with the experimental results,including having Gidaspow-Gidaspow model taken as the pneumatic transmission model to analyze such kinetic parameters as viscosity coefficient,drag coefficient and restitution collision coefficient(e_(ss)). Through discussing the distribution rule of the pipe pressure when analyzing both viscosity coefficient and drag coefficient in the Gidaspow-Gidaspow model,the effects of restitution collision coefficient and inlet velocity (v_g) on the change characteristics of pressure drop in the pipe were obtained.
For purpose of reducing the pipe pressure drop and decreasing the turbulence intensity incurred by conveying the powder particle group in inhomogeneous suspension,through basing on the Eulerian two-fluid turbulence model,applying Fluent software and establishing 4 combined models of viscosity coefficient (μ_s,k_(in)) and drag coefficient (β) in Syamlal-O'Brien and Gidaspow models was implemented and compared with the experimental results,including having Gidaspow-Gidaspow model taken as the pneumatic transmission model to analyze such kinetic parameters as viscosity coefficient,drag coefficient and restitution collision coefficient(e_(ss)). Through discussing the distribution rule of the pipe pressure when analyzing both viscosity coefficient and drag coefficient in the Gidaspow-Gidaspow model,the effects of restitution collision coefficient and inlet velocity (v_g) on the change characteristics of pressure drop in the pipe were obtained.
引文
[1]黄芬霞,靳世平.管道内颗粒气力输送的研究现状与热点分析[J].中国粉体技术,2017,23(5):87~92.
[2]关佳斌,裴旭明,张琳荔.粮食颗粒群密相变径气力输送的流动特性[J].中国粉体技术,2018,24(2):38~43.
[3]杜俊,胡国明,方自强,等.稀相气力输送CFD-DEM仿真中两种模型的比较[J].海军工程大学学报,2015,27(2):57~60.
[4]王康虎,武建军,罗生虎.风沙运动的欧拉双流体模型参数研究[J].中国沙漠,2014,34(6):1461~1468.
[5]刘敏,黄明明,丁小骄,等.小流量煤粉浓相气力输送特性[J].科学技术与工程,2016,16(20):169~174.
[6]衣华,刘宗明,杜滨,等.浓相气力输送粉煤灰颗粒速度的研究及应用[J].济南大学学报(自然科学版),2007,21(1):25~27.
[7]李阳,裴旭明,胡英杰.基于网络预测的粮食颗粒输送模糊控制系统设计[J].郑州轻工业学院学报(自然科学版),2015,30(1):90~94.
[8]胡英杰.粮食气力输送的流量预测与模糊控制研究[D].郑州:郑州轻工业学院,2013.
[9]霍征征.粮食气力输送系统流动特性分析与优化设计[D].郑州:郑州轻工业学院,2013.
[10]李阳.粮食颗粒群悬浮输送气固两相流动特性研究[D].郑州:郑州轻工业学院,2015.
[11]杨伦,谢一华.气力输送工程[M].北京:机械工业出版社,2006.
[12]袁竹林.气固两相流动与数值模拟[M].南京:东南大学出版社,2013.
[13]Behera N,Agarwal V K,Jones M G,et al.Modeling and Analysis of Dilute Phase Pneumatic Conveying of Fine Particles[J].Powder Technongy,2013,249:196~204.
[14]Kus F T,Duchesne M A,Champagne S,et al.Pressurized Pneumatic Conveying of Pulverized Fuels for Entrained Flow Gasification[J].Powder Technology,2016,287:403~411.
[15]Du W,Bao X J,Xu J,et al.Computational Fluid Dynamics(CFD)Modeling of Spouted Bed:Assessment of Drag Coefficient Correlations[J].Chemical Engineering Science,2006,61(5):1401~1420.
[2]关佳斌,裴旭明,张琳荔.粮食颗粒群密相变径气力输送的流动特性[J].中国粉体技术,2018,24(2):38~43.
[3]杜俊,胡国明,方自强,等.稀相气力输送CFD-DEM仿真中两种模型的比较[J].海军工程大学学报,2015,27(2):57~60.
[4]王康虎,武建军,罗生虎.风沙运动的欧拉双流体模型参数研究[J].中国沙漠,2014,34(6):1461~1468.
[5]刘敏,黄明明,丁小骄,等.小流量煤粉浓相气力输送特性[J].科学技术与工程,2016,16(20):169~174.
[6]衣华,刘宗明,杜滨,等.浓相气力输送粉煤灰颗粒速度的研究及应用[J].济南大学学报(自然科学版),2007,21(1):25~27.
[7]李阳,裴旭明,胡英杰.基于网络预测的粮食颗粒输送模糊控制系统设计[J].郑州轻工业学院学报(自然科学版),2015,30(1):90~94.
[8]胡英杰.粮食气力输送的流量预测与模糊控制研究[D].郑州:郑州轻工业学院,2013.
[9]霍征征.粮食气力输送系统流动特性分析与优化设计[D].郑州:郑州轻工业学院,2013.
[10]李阳.粮食颗粒群悬浮输送气固两相流动特性研究[D].郑州:郑州轻工业学院,2015.
[11]杨伦,谢一华.气力输送工程[M].北京:机械工业出版社,2006.
[12]袁竹林.气固两相流动与数值模拟[M].南京:东南大学出版社,2013.
[13]Behera N,Agarwal V K,Jones M G,et al.Modeling and Analysis of Dilute Phase Pneumatic Conveying of Fine Particles[J].Powder Technongy,2013,249:196~204.
[14]Kus F T,Duchesne M A,Champagne S,et al.Pressurized Pneumatic Conveying of Pulverized Fuels for Entrained Flow Gasification[J].Powder Technology,2016,287:403~411.
[15]Du W,Bao X J,Xu J,et al.Computational Fluid Dynamics(CFD)Modeling of Spouted Bed:Assessment of Drag Coefficient Correlations[J].Chemical Engineering Science,2006,61(5):1401~1420.