|
位置：首页 >> 期刊文章
|
|
摘要：
|
|
在重力作用下,泥沙沿输送管道横截面的分布呈现上层稀疏下层浓密的特点。据此可将整个流动简化为具有不同平均速度和平均浓度的两层流动。以中沙在直径为150 mm管道上的实测流动为例,用迭代方法确定了两层流动的分界面位置,结果表明两层流动模型能够刻画泥沙在管道中流动的主要特征和内部结构。
|
|
Under the action of gravity,the cross sectional distribution of sediment in the conveying pipelines shows that the sediment in the upper part of the pipelines is thin while the sediment in the lower part is dense and thick.As a result,the whole flow can be reduced to two levels of flow with different mean velocity and mean concentration.Taking the measured flow of medium sand in 150 mm pipelines as an example,the location of the interface between the two levels of flow is determined with the iteration method.The results show that the two-level flow model can depict the major features and internal structure of sediment flow in the pipelines.
|
|
基金项目：
|
|
国家自然科学基金资助项目(No:50679016)
|
|
作者简介：
|
|
|
|
参考文献：
|
|
[1]邓祥洁.管道输沙阻力特性研究[D].南京:河海大学,2005.
[2]费祥俊.浆体的物理特性与管道输送流速[J].设计与研究,2000,(1):1-8.
[3]张兴荣.管道水力输送[M].中国水利水电出版社,1996.
[4]Wasp E J,Kenny J P,Gandhi B L.Solid-liquid flow slurrypipeline transportation[M].Clausthal:Trans Tech Publica-tion,1977.
[5]Durand R.The hydraulic transportation of coal and solidmaterials in pipes[C].Colleq of national coal board,Lon-don,1952.
[6]Matousek.Flow mechanism of sand-water mixtures inpipelines[D].The Netherlands,Delft University Press,1997.
[7]Wilson K C,Streat M,Bantin R A.Slip model correlationof dense two phase flow[C],Proc.2nd Int.Conf.on theHydraulic Transport of solid in pipes,BHRA Fluid Engineer-ing.Cranfield,U.K.,1972.B1,1-10.
[8]Wilson K C.A unified Physically-based analysis of solid-liquid pipeline flow[C].Proceedings Hydro transport,4BHRA.Cranfield,UK,1976.1-16.
[9]Wilson K C.Evaluation of interfacial friction for pipelinetransport models[C].Proc.11th Int.Conf.on the Hy-draulic Transport of solid in pipes,BHRA Fluid Engineer-ing.Cranfield,U.K.,1988.B4,107-116.
[10]A R Khan,J F Richardson.Comparison of coarse slur-ry pipeline models[C].Proceedings of the 13th InternationalConference on Slurry Handling and Pipeline Transport.BHRA,South Africa,1996.
[11]徐立群,倪福生.管道泥沙浓度分布的伽玛射线测量[J].计算机测量与控制,2005,(11):1 207-1 209.
[12]F Ni,V matousek.Flow of aqueous mixture of sand com-posed of fractions of different particle size[C].Proceedingsof the 14th International Conference on Slurry Handlingand Pipeline Transport,BHRA.Maastricht,The Nether-lands,1999.
[13]Fusheng Ni.Laboratory investigation on sand-water flow ina pipeline and characteristics of a slurry pump with highsolids concentration[J].Dredging Technology,TheNetherlands,1999.
[14]NI Fusheng,ZHAO Lijuan.Two-phase flow of highly con-centrated slurry in a pipeline[J].Journal of Hydrodyna-mics,Ser.B,2004,16(3):325-331.
[15]NI Fusheng,ZHAO Lijuan,XU Liqun,W.J.Vlasblom.AModel Calculation for Flow Resistance in the HydraulicTransport of Sand[C].Proceedings of the 18th WorldDredging Congress.Orlando,Florida,USA,2007.
|
|
服务与反馈：
|
|
【文章下载】【加入收藏】
|
|
|
|
|