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Flow velocity pattern around trapezoidal piano key side weirs
Flow Measurement and Instrumentation ( IF 2.2 ) Pub Date : 2020-12-01 , DOI: 10.1016/j.flowmeasinst.2020.101847
Minasadat Seyedjavad , SeyedTaghi Omid Naeeni , Mojtaba Saneie

Abstract In general, the side weirs are the structures installed along a channel or river. When the flow depth rises above the weir crest, the overflow passes through these weirs and enters the lateral canal. Nowadays, piano key weirs are considered as an important alternative to labyrinth weirs to modify the weirs encountering with difficulty to pass the maximum flow discharges. The present study investigates the hydrodynamic performance and the effect of the uniformity of velocity field on the resultant kinetic energy in the trapezoidal piano key side weirs with 90° installed laterally in the main channel wall. These weirs are classified as A-Type piano key weirs and two approaches (main: Mode 1 and adverse: Mode 2) were used to investigate the effect of the weirs' placement on their performance. The results showed that for velocity vectors in both modes, on average, the maximum flow discharge through the side weir occurred in the x and y directions (Vx and Vy) at Z*

中文翻译:

梯形钢琴键侧堰周围的流速模式

摘要 通常,边堰是沿河道或河流安装的结构。当水流深度上升到堰顶以上时,溢流通过这些堰并进入侧渠。如今,钢琴键堰被认为是迷宫堰的重要替代品,以修改难以通过最大流量排放的堰。本研究调查了水动力性能和速度场的均匀性对横向安装在主通道壁上的梯形钢琴键侧堰中的合成动能的影响,该堰侧向 90°。这些堰被归类为 A 型钢琴键堰,并使用两种方法(主要:模式 1 和不利:模式 2)来研究堰的位置对其性能的影响。
更新日期:2020-12-01
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