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| FLOW FIELD IN SCOURED ZONE OF CHANNEL CONTRACTIONS | |
| 引用本文： | RajkumarV.RAIKAR SubhasishDEY. FLOW FIELD IN SCOURED ZONE OF CHANNEL CONTRACTIONS[J]. 国际泥沙研究, 2004, 19(4): 292-311 |
| 作者姓名： | RajkumarV.RAIKAR SubhasishDEY |
| 作者单位： | [1]DoctoralResearchFellow,DepartmentofCivilEngineering,IndianInstituteofTechnology,Kharagpur721302,WestBengal,India. [2]AssociateProfessor,DepartmentofCivilEngineering,IndianInstituteofTechnology,Kharagpur721302,WestBengal,India. |
| 摘 要： | Experiments were conducted in a laboratory flume to measure the two-dimensional turbulent flow field in the scoured zone of channel contractions under a clear-water scour condition. The Acoustic Doppler Velocimeter (ADV) was used to detect the flow field at different vertical lines along the centerline of uncontracted (main channel) and contracted zones of the channel. The distributions of time-averaged velocity components, turbulent intensity, turbulent kinetic energy, and Reynolds stresses are presented in nondimensional graphical form. The bed shear stresses are computed from the measured Reynolds stresses being in threshold condition within the zone of contraction where bed was scoured. The data presented in this paper would be useful to the investigators for the development of kinematic flow model and morphological model of scour at a channel or river contraction. |
| 关 键 词： | 管道收缩 湍流 腐蚀 土砂流送 |
FLOW FIELD IN SCOURED ZONE OF CHANNEL CONTRACTIONS |
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| Rajkumar V.RAIKAR,Subhasish DEY. FLOW FIELD IN SCOURED ZONE OF CHANNEL CONTRACTIONS[J]. International Journal of Sediment Research, 2004, 19(4): 292-311 | |
| Authors: | Rajkumar V.RAIKAR Subhasish DEY |
| Affiliation: | Corresponding author |
| Abstract: | Experiments were conducted in a laboratory flume to measure the two-dimensional turbulent flow field in the scoured zone of channel contractions under a clear-water scour condition. The Acoustic Doppler Velocimeter (ADV) was used to detect the flow field at different vertical lines along the centerline of uncontracted (main channel) and contracted zones of the channel. The distributions of time-averaged velocity components, turbulent intensity, turbulent kinetic energy, and Reynolds stresses are presented in nondimensional graphical form. The bed shear stresses are computed from the measured Reynolds stresses being in threshold condition within the zone of contraction where bed was scoured. The data presented in this paper would be useful to the investigators for the development of kinematic flow model and morphological model of scour at a channel or river contraction. |
| Keywords: | Channel contraction Open channel flow Turbulent flow Erosion Scour Sediment transport Fluvial hydraulics |
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