Experimental Measurements of Drag and Lift Coefficient on Building with an Elliptical Cross-section

M. Franek, M. Macák, O. Hubová
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引用次数: 1

Abstract

Abstract The characteristics of aerodynamic forces acting on an elliptic cylinder with an aspect ratio of 0.5 with a wind attack angle from 0 to 90° and subjected to the boundary layer wind tunnel were investigated. The model was initially calibrated and compared with the existing work. The aspect ratio of the investigated model was 0.5, and the model was emerging in a turbulent flow. The mean and fluctuating drag and lift coefficients were investigated. The minimum drag coefficient occurred in the wind direction of 0° and the maximum at 90°. The lift coefficient was the largest in the 30° wind direction and the smallest at 0°. Fluctuating coefficients were similar profiles as the mean coefficients. Around the 30° wind direction, an inappropriate phenomenon occurred, caused by the generation of asymmetrical vortices structures and wake instabilities.
椭圆截面建筑物阻力和升力系数的实验测量
研究了长径比为0.5、风攻角为0 ~ 90°的椭圆圆柱在边界层风洞作用下的气动力特性。对该模型进行了初步校正,并与现有工作进行了比较。模型的展弦比为0.5,模型在湍流中出现。研究了平均阻力系数和波动阻力系数。阻力系数在0°风向时最小,在90°风向时最大。升力系数在风向为30°时最大,在风向为0°时最小。波动系数与平均系数相似。在30°风向附近,由于不对称涡结构和尾流不稳定的产生,出现了不合适的现象。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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