CAJ | 학술논문

在垂直跌水池的水槽试验中，在一定的水力条件与跌水池尺寸相匹配时，跌水池内会形成舌流、滑行水流与周期性振荡流。针对实验观察的现象，采用数值模拟以及理论分析着重研究了跌水池中周期性振荡流的流动演变特性与消能机理，并初步探讨了周期性振荡流的产生机理。研究分析表明，该周期性振荡流的流态呈现有波破碎与水跃的形态，据此可将跌水池分为回流区、水平冲击区、垂直冲击区、表面振荡破碎区以及尾部漩涡区。由于流体的惯性与结构物对水流的反射作用扰动了原流场自由液面，在波和涡的相互作用下形成了周期性振荡流。
재수직질수지적수조시험중，재일정적수력조건여질수지척촌상필배시，질수지내회형성설류、활행수류여주기성진탕류。침대실험관찰적현상，채용수치모의이급이론분석착중연구료질수지중주기성진탕류적류동연변특성여소능궤리，병초보탐토료주기성진탕류적산생궤리。연구분석표명，해주기성진탕류적류태정현유파파쇄여수약적형태，거차가장질수지분위회류구、수평충격구、수직충격구、표면진탕파쇄구이급미부선와구。유우류체적관성여결구물대수류적반사작용우동료원류장자유액면，재파화와적상호작용하형성료주기성진탕류。
It was discovered that in flume experiment, under certain conditions, the dropping flow forms napped flow, skimming flow and periodic oscillation flow. Based on the numerical simulation,flume experi?ment and theoretical analysis, this paper focuses on studying the energy dissipation mechanism,flow evolu?tion characteristics and generating mechanism of periodic oscillatory flow. The results show that the flow pat?tern of periodic oscillation flow presents a similar wave of broken and hydraulic jump. The vertical drop pool is divided into recirculation region,level of impact zone,the vertical impact zone,oscillation and bro?ken zone and the tail vortex zone. Since fluid inertia and the reflection effect of structure disturb the origi?nal free surface,the periodic oscillation flow forms under the wave-mean vortex interaction.