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발전소 배관계통의 유동유발진동 현상에 대한 수치해석 연구
오세홍(Se-Hong Oh),한진(Jin Han),홍화선(Hwa-Sun Hong),이종일(Jong-Il Lee),손성만(Sung-Man Son),최청열(Choengryul Choi) 대한기계학회 2016 대한기계학회 춘추학술대회 Vol.2016 No.12
Numerical analysis has been conducted in order to investigate the cause of piping vibration problem in thermal power plants. Piping vibration due to instability of the fluid flow is referred to flow-induced vibration(FIV), which could inhibit the structural integrity of piping system and its supporting structures. In this work, large eddy simulation(LES) and frequency analysis have been performed to evaluate the vibrational characteristics of the pipeline behind centrifugal pump. Although flow-induced vibration can be caused by a variety of reasons, present study focused on vibration phenomena only due to unstable fluid flow such as turbulence and vortex shedding. Especially, the effects of opening ratio of the discharge valve on the vibrational characteristics was mainly evaluated.