The Influence About Select Corner Of Spur Dike On Bend Located In The Interchange Of Curves

Natural river, the DC miter River river is a natural phenomenon widespread.Because the natural river morphology varies according to the morphologicalcharacteristics of the intersection near the mouth of the main stream of the river canbe divided into curved intersection and the intersection of two linear type. Curvedriver flow regime itself is very complex, a tributary of the intersection curve makesthe confluence of local geometry and hydraulic conditions more complicated.Therefore, the study of flow characteristics curved corners confluence not only ofgreat theoretical value, but also has a positive practical value in the shipping, designof hydraulic structures, river regulation and other aspects.The topics to the intersection of the curved corners of the mouth guard as astarting point, the effects of different research groups to pick angles groins confluenceof the curved corners. Currently, river training works in groyne is a very commonbuilding sand with water attack beam control river regime, obstruct the high water andthe protection of the multiple roles of beach and so on. Especially for bank protectionworks, the construction of groins after, the water is compressed, so suddenly enlargedunder section groins, flow due to the formation of a narrow separation andrecirculation zone. Therefore, the study of spur dikes pick angle on the curved cornersof the confluence with general practice.There are studies on the groyne water for most of the straight section of the rivergroyne layout, but in the actual river, most of the design is for the vulnerable spotgroyne on the corners, the subject of the confluence with curved corners arrangedspur dikes for the study, in line with the actual situation. In this paper, based on themodel test tank for curved corners confluence flow characteristics, test instruments,"FlowTracker " using advanced three-dimensional acoustic Doppler current meterADV (Aeoustic Doppler Veloimeter) on the confluence curved corners and groyne flow velocity measurement system nearby, get the corners and curves of type groyneinformation about the confluence, pick from a wide range of different impact anglesspur dikes at the confluence of the curved corners. This test uses flat plexiglass tankbe generalized model test analyzes the non-submerged spur dikes pick angles atdifferent water levels and the different role of the intersection angle curved cornersconfluence of protection, pick a different angle of the curved spur dikes free surfacemorphology of the confluence of the curve, the vertical velocity distribution, theimpact of vertical turbulent intensity distribution, but also explores the impact ofwater level changes on the flow pattern of the groyne. Research results: After theconfluence of the curve curved concave bank arranged spur dikes can narrow beamcurrents, adjust and130optimize the velocity distribution, changes in free surface flowcurve shape. In the intersection angle and water in certain circumstances, to changethe groins pick a certain impact angle flow rate on the confluence of the curvedcorners; intersection angle and groin in the corner, under certain circumstances, thewater level is not near the surface morphology of groins on it large, but relativelylarge impact on the curve convex bank. The topic for different angles spur dikes pickthe confluence of the curved corners hydraulic characteristics for a more in-depthanalysis of the system, designed to further scientific studies such confluence corners,river training design and other research projects, features provide a reference.