CFD 해석에 의한 산악지형의 풍속할증 영향에 관한 연구
A Study on Wind Speed-up Effects over 3-Dimensional Hills Using CFD Analysis
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참고문헌
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초록
Wind speed-up effects due to topography for isolated three-dimensional hills are investigated by performing computational fluid dynamics (CFD) analysis. In the CFD analysis, four hill models having four different slopes are taken into account, and topographic factors for three-dimensional hills are estimated for the along-wind and crosswind directions. Also, the results of the CFD analysis about wind speed-up are compared with those from not only the wind tunnel experiment, but also Korean and international standards. In the CFD analysis, very large wind speed-up occurred near the crest of a hill, and wind speed increased about 48% to 56%. At various locations on the hillside and at the foot of a hill in along-wind direction, wind speed increased slightly or decreased, however at the same levels in the crosswind direction, wind speed increased. In the crosswind direction, the wind speed increased about 31% to 50% on the hillside at the mid-height of a hill, and about 19% to 27% at the foot of a hill. In the study, the difference between topographic factors obtained from the CFD analysis and those from the wind tunnel experiment ranged approximately from 3% to 8%, and the effect of topography on wind speed-up near the foot of a hill in the crosswind direction was not negligible.
Abstract
Wind speed-up effects due to topography for isolated three-dimensional hills are investigated by performing computational fluid dynamics (CFD) analysis. In the CFD analysis, four hill models having four different slopes are taken into account, and topographic factors for three-dimensional hills are estimated for the along-wind and crosswind directions. Also, the results of the CFD analysis about wind speed-up are compared with those from not only the wind tunnel experiment, but also Korean and international standards. In the CFD analysis, very large wind speed-up occurred near the crest of a hill, and wind speed increased about 48% to 56%. At various locations on the hillside and at the foot of a hill in along-wind direction, wind speed increased slightly or decreased, however at the same levels in the crosswind direction, wind speed increased. In the crosswind direction, the wind speed increased about 31% to 50% on the hillside at the mid-height of a hill, and about 19% to 27% at the foot of a hill. In the study, the difference between topographic factors obtained from the CFD analysis and those from the wind tunnel experiment ranged approximately from 3% to 8%, and the effect of topography on wind speed-up near the foot of a hill in the crosswind direction was not negligible.
참고문헌 (19)
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