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工程科学与技术:2013,45(1):55-60
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悬移质泥沙采集分离器内流场的3维数值模拟
(1.四川大学 建筑与环境学院;2.中国科学院 成都山地灾害与环境研究所)
Three-dimensional Numerical Simulation of Flow Field in a Separator for Sampling the Suspended Sediment
(1.College of Architecture and Environment,Sichuan Univ.;2.Inst. of Mountain Hazards and Environment,CAS)
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投稿时间:2012-07-18    修订日期:2012-11-09
中文摘要: 为高效采集水体中低浓度的悬移质泥沙,通过3维数值模拟设计了具有水力旋流器特征的新型悬移质泥沙采样器。采用拉格朗日法多相流分析模型,3维模拟分析了采样器内部压力分布、流体流动情况和悬移质泥沙颗粒的运动轨迹。室内模拟实验结果表明:该泥沙采集分离器对悬移质泥沙(粒径63 μm)分离效率高达85%以上,可实现悬移质泥沙的快速在线收集浓缩。泥沙分离效率的实测结果与3维数值模拟分析结果吻合(相差2%~8%)。
Abstract:In order to efficiently sample the suspended sediment with a low concentration,a three-dimensional simulation design was presented for a new suspended sediment sampler characteristic of a hydrocyclone.Using a Lagrangian approach with fluid multi-phase model,the pressure distribution,fluent flow,and particle trajectory in the inner sampler were three-dimensionally simulated.A laboratory experiment showed that its sediment separation efficiency is up to 85% for the sediment particles with individual grain size of 63 μm,which achieved the rapid in-situ collection of suspended sediment,and the predictions using the three-dimensional simulation are in good agreements with experimental results.
文章编号:201200555     中图分类号:    文献标志码:
基金项目:中科院西部行动计划资助项目(KZCX2-XB3-09);四川大学青年教师科研启动基金(2011SCU11094)
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曹植菁,贺秀斌.悬移质泥沙采集分离器内流场的3维数值模拟[J].工程科学与技术,2013,45(1):55-60.
Cao Zhijing,He Xiubin.Three-dimensional Numerical Simulation of Flow Field in a Separator for Sampling the Suspended Sediment[J].Advanced Engineering Sciences,2013,45(1):55-60.