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Characteristics of energy dissipation in hyperconcentrated flows
  • ISSN号:1001-6279
  • 期刊名称:国际泥沙研究(英文版)
  • 时间:0
  • 页码:387-397
  • 语言:中文
  • 分类:TV14[水利工程—水力学及河流动力学]
  • 作者机构:[1]Assoc. Prof., School of Environment, Key Laboratory of Water and Sediment Sciences of Ministry of Education, Beijing Normal University, Beijing 100875, China, [2]Prof., Institute of Mechanics, Chinese Academy of Sciences, Beijing 100080, China, [3]Lecturer, Dr., School of Environment, Beijing Normal University, Beijing 100875, China, [4]Graduate student, School of Environment, Beijing Normal University, Beijing 100875, China
  • 相关基金:Acknowledgements The flume experiments for sediment transport were carried out at the State Key Laboratory of Hydroscience and Engineering, Tsinghua University, and the Yellow River Institute of Hydraulic Research Support from experts at these laboratories is greatly appreciated. This study is supported by the National Natural Science Foundation of China (Grant No. 10672024 and No. 10825211).
  • 相关项目:非均质粘性泥石流动力学模型研究
中文摘要:

为在沉积沉重的流动的骚乱精力的一个平衡方程根据 solidliquid 被导出二阶段的流动理论。方程为二维的、一致、稳定、充分开发的狂暴的 hyperconcentrated 流动被简化。推迟负担的运动的一个精力效率系数从骚乱精力方程被获得,它被定义为沉积暂停精力的比率到沉积沉重的流动的骚乱精力。实验室实验被进行在 hyperconcentrated 流动调查精力驱散的特征。115 试验性的跑的一个总数被执行,包括有自然沉积的 70 跑, 45 与炉渣粉末跑。沉积暂停精力和流动抵抗上的沉积集中的效果被分析,在推迟负担的运动和沉积集中的精力效率系数之间的关系根据试验性的数据被建立。而且,在 hyperconcentrated 流动的精力驱散的特征被识别并且描述。高沉积集中不增加精力驱散,这被发现;相反,它减少流动抵抗。

英文摘要:

An equilibrium equation for the turbulence energy in of solid-liquid two-phase flow theory. The equation sediment-laden flows was derived on the basis was simplified for two-dimensional, uniform, steady and fully developed turbulent hyperconcentrated flows. An energy efficiency coefficient of suspended-load motion was obtained from the turbulence energy equation, which is defined as the ratio of the sediment suspension energy to the turbulence energy of the sediment-laden flows. Laboratory experiments were conducted to investigate the characteristics of energy dissipation in hyperconcentrated flows. A total of 115 experimental runs were carried out, comprising 70 runs with natural sediments and 45 runs with cinder powder. Effects of sediment concentration on sediment suspension energy and flow resistance were analyzed and the relation between the energy efficiency coefficient of suspended-load motion and sediment concentration was established on the basis of experimental data. Furthermore, the characteristics of energy dissipation in hyperconcentrated flows were identified and described. It was found that the high sediment concentration does not increase the energy dissipation; on the contrary, it decreases flow resistance.

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期刊信息
  • 《国际泥沙研究:英文版》
  • 主管单位:
  • 主办单位:国际泥沙研究培训中心
  • 主编:王兆印
  • 地址:北京车公庄两路20号泥沙中心
  • 邮编:100048
  • 邮箱:chyh@iwhr.com
  • 电话:010-68786579
  • 国际标准刊号:ISSN:1001-6279
  • 国内统一刊号:ISSN:11-2699/P
  • 邮发代号:
  • 获奖情况:
  • 国内外数据库收录:
  • 德国国际建筑数据库,英国农业与生物科学研究中心文摘,荷兰文摘与引文数据库,美国地质文献预评数据库,美国剑桥科学文摘,美国科学引文索引(扩展库)
  • 被引量:184