混凝土泵送中管壁磨损过程的离散元模拟研究

中国机械工程 ›› 2014, Vol. 25 ›› Issue (15): 2091-2097.

混凝土泵送中管壁磨损过程的离散元模拟研究

谭援强1;宋军华1;张浩1;王佳茜2;邓熔1;杨冬民1

1.湘潭大学，湘潭，411105
2.中联重科混凝土机械公司，长沙，410000

出版日期:2014-08-10 发布日期:2014-08-13
基金资助:
国家自然科学基金资助项目（50875224）；新世纪优秀人才支持计划资助项目（NCET：06-0708）；湖南省高校科技创新团队（[2012]318）

Numerical Study of Wear Process on Pipe Wall in Concrete Pumping Using DEM

Tan Yuanqiang1;Song Junhua1;Zhang Hao1;Wang Jiaqian2;Deng Rong1;Yang Dongmin1

1.Xiangtan University,Xiangtan,Hunan,411105
2.Zoomlion Concrete Machinery Company,Changsha,410000

Online:2014-08-10 Published:2014-08-13
Supported by:
National Natural Science Foundation of China（No. 50875224）;Program for New Century Excellent Talents in University of Ministry of Education of China（No. NCET：06-0708）

摘要/Abstract

摘要：

建立了混凝土离散元模型，并通过L箱流动实验校核了该模型，得到了计算参数。采用该模型及得到的参数对混凝土泵送过程进行数值模拟，其中，以颗粒对管壁的冲击力和平均力表征壁面磨损程度，对泵送过程中管壁磨损过程进行研究。分析了泵送速度、弯管角度等因素对管壁磨损分布的影响，预测了最易磨损位置。结果表明：弯管管壁磨损随着泵送速度的增大而增大，随着弯管角度的增大而增大，模拟结果与实际泵送过程中观测到的最易磨损位置吻合较好。

关键词: 混凝土泵送, 磨损过程, 离散单元法, 管壁

Abstract:

A discrete element model of fresh concrete was established and validated by L-box flow test of fresh concrete with physical parameters verified. Then the model and obtained parameters were used to simulate the concrete pumping process, where the impact forces on pipe wall were calculated and drawn to stand for the wear situation on the walls, the location of the puncture point was predicted. The effect of pumping speed and pipe bend were addressed. The statistic results were validated by comparing the numerical results with an actual broken bend, which indicates that the wear on the pipe wall increases with pumping speed and degree of pipe bend.

Key words: concrete pumping, wear process, discrete element method(DEM);pipe wall

中图分类号:

TH16

谭援强, 宋军华, 张浩, 王佳茜, 邓熔, 杨冬民. 混凝土泵送中管壁磨损过程的离散元模拟研究[J]. 中国机械工程, 2014, 25(15): 2091-2097.

Tan Yuanqiang, Song Junhua, Zhang Hao, Wang Jiaqian, Deng Rong, Yang Dongmin. Numerical Study of Wear Process on Pipe Wall in Concrete Pumping Using DEM[J]. China Mechanical Engineering, 2014, 25(15): 2091-2097.

参考文献

[1]赵志缙.混凝土泵送施工技术[M].北京：中国建筑工业出版社，1998.
[2]Chen X, McLaury B S, Shirazi S A. Effects of Applying a Stochastic Rebound Model in Erosion Prediction of Elbows and Plugged Tee[C]//Fluids Engineering Division Meeting. Mentreal Quebec,2002.
[3]Stoker R L. Erosion Due to Dust Particles in a Gas Stream[J]. Industry and Engineering Chemistry, 1949(41): 1196-1199.
[4]Tilly G P. Erosion Caused by Airborne Particle[J]. Wear, 1969,14(1): 63-79.
[5]Mills D. Erosive Wear Problems in Industry with Particular Reference to Process Plant, Power Station and Bulk Solids Handling Systems[C]//SOLIDEX’86 Conference Exhibition. Harrogate, 1986.
[6]Mazumder Q H, Shirazi S A, McLaury B S. Prediction of Solid Particle Erosive Wear of Elbows in Multiphase Annular Flow-model Development and Experimental Validations[J]. ASME: Journal of Pressure Vessel Technology, 2008, 130: 113031-113038.
[7]Burnett A J. The Use of Laboratory Erosion Tests for the Prediction of Wear in Conveyor Bends[D]. London:University of Greenwish,1996.
[8]Deng T, Patel M, Hutchings I, et al. Effect of Bend Orientation on Life and Puncture Point Location due to Solid Particle Erosion of High Concentrated Flow in Pneumatic Conveyors[J]. Wear, 2005,258(1/2/3/4): 426-33.
[9]Hutchings I M. Tribology[M]. Oxford:Butterworth Heinemann, 2001.
[10]Gammal M E, Mazhar H, Cotton J S, et al. The Hydrodynamic Effects of Single Phase Flow on Flow Accelerated Corrosion in a 90-degree Elbow[J]. Nuclear Engineering and Design, 2010(240): 1589-1598.
[11]Chen X H, McLaury B S, Shirazi S A. A Comprehensive Procedure to Estimate Erosion in Elbows for Gas/Liquid/Sand Multiphase Flow[J]. Journal of Energy Resources Technology, 2006(128): 70-79.
[12]Ma K T, Ferng Y M, Ma Y P. Numerically Investigating the Influence of Local Flow Behaviors on Flow-accelerated Corrosion Using Two-fluid Equations[J]. Materials for Nuclear Systems, 1998(123): 90-102.
[13]Hidayat M, Rasmuson A. Some Aspects on Gas-solid Flow in a U-bend: Numerical Investigation[J]. Powder Technology, 2005(153): 1-12.
[14]Barton N A. Erosion in Elbows in Hydrocarbon Protection Systems: Review Document[R]. Glasgow:Health and Safety Executive.2003.
[15]王安麟, 虞晓华, 俞梓仪,等. 多相流体条件下混凝土泵送弯管磨损机理分析[J].上海交通大学学报, 2009, 43(2): 318-321.
Wang Anlin, Yu Xiaohua, Yu Ziyi, et al. The Wear Mechanism of Concrete Pumping Pipe under the Conditions of Multiphase Fluid[J]. Journal of Shanghai Jiao Tong University, 2009, 43(2): 318-321.
[16]Tan Y Q, Zhang H, Yang D M, et al. Numerical Simulation of Concrete Pumping Process and Investigation of Wear Mechanism of the Piping Wall[J]. Tribology International,2012(46): 137-144.
[17]Zhang H, Tan Y Q, Yang D M, et al. Numerical Investigation of the Location of Mmaximum Erosive Wear Damage in Elbow: Effect of Slurry Velocity, Bend Orientation and Angle of Elbow[J]. Powder Technology, 2012(217): 467-476.
[18]Chu H W, Machida H W, Kobayashi A H. Verification of DEM to Fresh Concrete by Sphere Dragging Viscometer[C]//Proceedings of the Annual Conference of JSCE. 1997: 463-468.
[19]Annika G. Numerical Modelling of Self-Compacting Concrete Flow[D]. Stockholm:Royal Institute of Technology (KTH), 2009.
[20]Zhang W C. Parallel Discrete Element Simulation and Its Application to the Study of Solid-Liquid Flow Behavior[D]. Taipei:Taiwan University, 2009.
[21]Zhang H, Tan Y, Shu S, et al. Numerical Investigation on the Role of Discrete Element Method in Combined LBM-IBM-DEM Modeling[J]. Computers & Fluids, 2014, 94：37-48.
[22]Zhang H, Tan Y Q, Li M J. A Numerical Simulation of Motion of Particles under the Wafer in CMP[C]//International Conference on Computer Science and Software Engineering. Wuhan, 2008:31-34.
[23]Zhang H, Trias F X M, Tan Y Q, et al. Parallelization of a DEM/CFD Code for the Numerical Simulation of Particle-laden Turbulent Flows[C]//23rd International Conference on Parallel Computational Fluid Dynamics. Barcelona, 2011:1-5.
[24]Quoc P H D, Uomoto T. Review on Simulation of Fresh Concrete Using DEM[C]//The 3rd ACF International Conference ACF/VCA. Ho Chi Minh City,2008:585-591.
[25]Cundall P A.A Computer Model for Simulating Progressive Large Scale Movements in Blocky System[C]//Proc. Symp. Int. Soc. Rock Mechanics. Rotterdam, 1971: 8-12.
[26]Itasca Consulting Group Inc..PFC2D User’s Manuals[Z]. Minneapdis:Itasca Consulting Group Inc.,2004.
[27]Yue X Q, Zhang H, Luo C S, et al. Parallelization of a DEM Code Based on CPU-GPU Heterogeneous Architecture[J]. Parallel Computational Fluid Dynamics, 2013(405): 149-159.
[28]Zhu H P, Zhou Z Y, Yang R Y, et al. Discrete Particle Simulation of Particular Systems: Theoretical Developments[J]. Chemical Engineering Science,2007(62): 3378-3396.