난류경계층 내 놓인 사각물체 주위의 높이와 방위각에 따른 압력변동특성연구
Effect of Vertical Height and Azimuth Angle on Wind Load of a Building with Square Cross Section Immerged in Turbulent Boundary Layer
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초록
본 연구는 두꺼운 난류경계층 내에 놓인 구조물의 높이와 방위각이 달라짐에 따라서 나타나는 구조물 주위의 유동특성을 파악하고자 하였다. 구조물 주위의 유동특성을 파악하기 위해 대기경계층 풍동실험을 수행하었다. 구조물의 높이는 3가지로 변화시켰으며, 방위각은 0∼90°까지 변화시켰다. 풍동실험의 레이놀즈수는 각 구조물 높이에 따라 다르게 나타나며 각각의 레이놀즈수는10.4×104(H1), 29.4×104(H2), 43.2×104(H3) 이다. 연구결과로서 높이와 방위각이 변화함에 따라 모서리에서 발생하는 박리현상이 변화하고 이는 구조물의 표면압력과 섭동압력에 상당한 영향을 끼치는 것을 확인할 수 있었다.
Abstract
The purpose of this study is to investigate the flow characteristics around a building with square cross section placed in a thick turbulent boundary layer with the changing different heights and oblique angle. Wind tunnel experiment was performed to understand the flow and load characteristics around the body. Three different Reynolds numbers (i.e. 10.4×104 (H1), 29.4×104 (H2), 43.2×104 (H3)) were based on the height of each body and wind speed U. The azimuth angles varied in the range of 0 – 90°. As a result, it was observed that the surface pressure characteristics on the bodies highly depended upon the height of the structures. In addition, the azimuth angles of the on-coming flow also highly affected the separation characteristics occurring at the edge around the rectangular structures.
참고문헌 (14)
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