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首页> 外文会议>Congress of Asia and Pacific Division of International Association of Hydraulic Engineering and Research >SIMULTANEOUSLY MEASUREMENTS OF VELOCITY AND PRESSURE ON THE BED WALL IN A BACKWARD-FACING STEP FLOW
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SIMULTANEOUSLY MEASUREMENTS OF VELOCITY AND PRESSURE ON THE BED WALL IN A BACKWARD-FACING STEP FLOW

机译：同时测量床墙上的速度和压力在后面的步长流动中

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摘要

A revetment block which is located just downstream of a weir is sometimes destroyed during the flood. The one of the reason why the revetment is destroyed is pressure fluctuations near the bed. The drag and lift forces of bed materials on the bed are measured by many researchers. Turbulent structure in open-channel flows behind a backward-facing step is also investigated with a PIV and LDA. In contrast, pressure fluctuations on the bed were not measured, due to its difficulty. In this study, simultaneously measurements of velocity and pressure on the bed wall in a backward-facing step flow were conducted with a PIV and pressure transducer. It was found that the instantaneous pressure increases when the K-H instability vortex which is generated behind the step is falling toward the bed wall. The kolk-boil vortex is generated after the K-H instability vortex hit on the bed wall.
机译：位于堰下游的装饰块有时会在洪水期间销毁。破坏破坏的原因之一是床附近的压力波动。床上床材料的阻力和升降力由许多研究人员衡量。还通过PIV和LDA对落后步骤后面的开放式步骤后面的湍流结构进行研究。相比之下，由于其困难，未测量床上的压力波动。在该研究中，通过PIV和压力传感器同时测量床壁上的床壁上的速度和压力。发现瞬时压力在步骤后面产生的K-H不稳定性涡流朝向床墙时增加。在床墙上击中K-H不稳定性涡旋后，产生了KOLK-SOUT VORTEX。

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