KSCE Journal of Civil and Environmental Engineering Research (대한토목학회논문집)
- Volume 12 Issue 4
- /
- Pages.11-22
- /
- 1992
- /
- 1015-6348(pISSN)
- /
- 2799-9629(eISSN)
A Study on the aerodynamic response of approximated three circular cylinders
근접한 세 원형구조물의 공기역학적 거동에 대한 연구
- Received : 1992.03.09
- Published : 1992.12.31
Abstract
It this study, the aerodynamic responses of circular cylinder behind a pair of circular cylinders arranged side by side in a uniform flow were investigated. We confirmed that four types of oscillation are occured on downstream cylinder in such an arrangement. Influenced by upstream cylinders, the amplitude of vortex induced oscillation is increased and wake buffeting occured when S/D(S: distance between the centers of upstream cylinders, D: diameter of cylinder) is smaller than 1.2. When S/D is larger than 1.2, gap flow introduces to oscillation which maintains a uniform amplitude in spite of increasing wind speed. This oscillation is reduced to "wake galloping" if its amplitude exceeds the limit point.
본 연구에서는 횡열(橫列)배치된 두 원형구조물의 하류측(下流側)에 위치하는 원형구조물의 공기역학적 거동에 대하여 고찰하였다. 세 구조물의 배치에 따라, 하류측(下流側) 구조물에는 4가지 종류의 진동이 발생하는 복잡한 거동이 나타난다. 상류측(上流側) 구조물의 존재에 의하여 vortex induced oscillation은 큰 진폭증가를 보이며, wake buffeting으로 판단되는 한정(限定)지동이 발생한다. 또한
Keywords