摘要
为进一步探索气动冲淤的作用机理和在工程实践中的应用,进行了气动冲淤数值仿真模型研究。采用立面二维水-沙-气三相仿真模型,对气动冲淤中气体及泥沙运动特性进行了探索,并对比了气动冲淤与水射流冲刷的优缺点。结果表明:①采用气动冲淤时,气流冲击到泥沙后向上运动,同时带动泥沙向上运动,随之被水流带走。相同条件下,水射流的冲刷范围大,但气动冲淤的冲沙效率更高,采用气动冲淤能达到较好的清淤效果。②气动冲淤中,气体流速越大,冲刷效果越明显,冲沙率随气体弗劳德数的增大呈线性增大趋势。
In order to study the mechanism and practice of air uplift and control sediment,this paper established a 2 D numerical simulation model which contained water flow,sediment and air flow.The dynamic characteristics of air flow and sediment with air uplift and control sediment had been investigated and the efficiency of air uplift and control sediment and water jet had been compared.The results show that a)with air uplift and control sediment,the air flow carry sands to the upper layer and taken away by the water flow.And the air uplift and control sediment has more advantages than that of water jet.b)With the increase of air flow,the dredging is more efficiency.And the air Froude is linear to scour rate.
作者
徐进超
丁磊
罗勇
XU Jinchao;DING Lei;LUO Yong(School of Hydrology and Water Resources,Nanjing University of Information Science & Technology,Nanjing 210044,China;Key Laboratory of Navigation Structures,MOT,Nanjing 210029,China;Nanjing Hydraulic Research Institute,Nanjing 210029,China)
出处
《人民黄河》
CAS
北大核心
2019年第6期29-33,共5页
Yellow River
基金
国家重点研发计划项目(2018YFC0407400)
国家自然科学基金资助项目(51409141)
南京信息工程大学科研启动项目(2017r097)
国家留学基金委公派留学项目(201808320127,201808320128)
关键词
气动冲淤
泥沙
数值仿真模型
气体弗劳德数
air uplift and control sediment
sediment
numerical simulation
air Froude
