张文皎1,2,赵连军1.管道排沙系统吸泥头优化设计及区域流场数值模拟[J].水电能源科学,2018,36(9):163-166
管道排沙系统吸泥头优化设计及区域流场数值模拟
Suction head Optimization Design and Regional Flow Field Numerical Simulation of Piping Desilting System
  
DOI:
中文关键词:  管道排沙  吸泥头  数值模拟  高流速区  吸泥效率
英文关键词:piping desilting  suction head  numerical simulation  high velocity area  suction efficiency
基金项目:黄河水利科学研究院科技发展基金专项项目(黄科发201705);国家自然科学基金项目(51379086);中央级公益性科研院所基本科研业务费专项项目(HKY JBYW 2016 35)
作者单位
张文皎1,2,赵连军1 1. 黄河水利委员会 黄河水利科学研究院 河南 郑州 450000 2. 中国科学院 地理科学与资源研究所 北京 100101 
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中文摘要:
      为实现管道排沙系统持续高效排沙,利用RNG κ ε双方程紊流模型对吸泥头附近区域流场进行三维数值模拟,建立吸泥头区域水力特性分析计算模型,揭示不同吸泥头形式及布置方式下的流场分布规律,寻求高排沙效率的吸泥头形式。结果表明,保持吸泥头与排沙管道的连接口贴近泥面,有利于吸泥头下方高流速区的塑造;吸泥头高度一定,存在一个适宜的吸泥头口径使得其吸泥效果最佳;选择合理的吸泥头形式,减小排沙管道流速或增大吸泥头离地距离,吸泥头仍可保持较高的吸泥效率。研究结果为管道排沙系统在水库清淤工程的应用提供参考依据
英文摘要:
      For realizing continuous efficient working of piping desilting system, RNG κ ε turbulent model was adopted to do three dimensional numerical simulation of regional flow field around the suction head. The calculation model was established to analyze the hydraulic characteristics of suction head area. The flow field distribution laws of different suction head arrangement form were demonstrated. The optimal suction head form with high desilting efficiency was put forward. The results indicate that keeping the connector between suction head and desilting pipe close to the surface of the sediment has advantages on making a high velocity area under the suction head. When the height of suction head is constant, there is a proper caliber generating best sucking effect. A suction head with its reasonable form can always maintain high working efficiency whether decreasing the flow velocity in the desilting pipe or increasing the distance between the suction head and the sediment surface. The research results provide references for application of piping desilting system in reservoir dredging engineering.
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