SCOUR DEPTH AND FLOW PATTERN OF ERODING PLANE JETS

查看全文 作　　者：[1]A.KURNIAWAN;[1]M.S.ALTINAKAR;[1]W.H.GRAF

机构地区：[1]Res. Assist., LRH, Ecole Polytechnique Federale, Lausanne, Switzerland,Res. Assoc., LRH, Ecole Polytechnique Federate, Lausanne, Switzerland, presently Prof., NCCHE, University of Mississippi, USA,Prof.,LRH,Ecole Polytechnique Federale, Lausanne,Switzerland

出　　处：《International Journal of Sediment Research》索引2004年第19卷第1期,共13页

摘　　要：Local scour may occur when a hydraulic structure is positioned in a channel with an erodible bed.Herewith investigated experimentally are the erosion and flow pattern due to a water jet passing over a channel bed at the asymptotic (final) state. The development of the scour hole, its maximum scour depth and length, are recorded and compared with available scour-depth relations. Two sets of experiments (see Table 1) were carried out. Set 1 (3 runs) was concerned with measuring the vertical instantaneous velocity distribution in the scour hole. The scour hole at the asymptotic (final) state, t ≈100 [h] was investigated. Set 2 (5 runs) was concerned with studying the physics of scouring. The scour hole at about mid-state, t ≈ 0.5 [h], was investigated; subsequently the scour-hole depth was linearly extended on the semi-log scale to 72 [h]; no velocity measurements were performed. The present data are put in context with some (popular) existing relations; recommended is a modification of some of these relations. 关键词：局部冲刷侵蚀流线谱冲刷深度预报

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SCOUR DEPTH AND FLOW PATTERN OF ERODING PLANE JETS

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