两个结冰垂直圆柱体串联式气动干扰风洞试验

IF 1.3 4区工程技术 Q3 MECHANICS

Fluid Dynamics Research Pub Date : 2021-11-18 DOI:10.1088/1873-7005/ac3b36

Shengli Li, Ruiqing Han, P. Guo, Xidong Wang, Yajie Chu

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引用次数: 0

摘要

由于结冰引起的形状变化，两列结冰圆柱的气动特性比较复杂，缺乏系统的研究。因此，通过一组风洞试验研究下风垂直圆柱体的气动特性，在亚临界雷诺数范围内改变冰形、结冰厚度、圆柱体间距和圆柱体结冰相对位置。结果表明:在相同迎角下，覆冰厚度对d型迎风圆柱升力系数的影响较大;在圆柱间距比(L/D)为4.8 ~ 6.2范围内，冰封背风圆柱的气动特性较为稳定。在分析两圆柱的稳定性时，应考虑流场的变化。在9°攻角和L< 6.2D范围内，受屏蔽作用影响，下风冰柱阻力系数变化明显。研究结果可为今后在工程实践中研究两圆柱结构的抗风性能提供实验参考。

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Wind tunnel tests of aerodynamic interference effects on two iced vertical circular cylinders in a tandem arrangement

The aerodynamic characteristics of the two iced vertical circular cylinders in a tandem arrangement, due to the shape change by icing, are complex, and lack systematical investigation. Therefore, a set of wind tunnel tests were carried out to study the aerodynamic characteristics of the leeward vertical cylinder, with ice shape, icing thickness, cylinder spacing, and icing relative position of cylinders varied in the subcritical Reynolds number range in this study. Results show that the icing thicknesses had a greater impact on the lift coefficients of D-shaped ice leeward cylinder at the same angle of attack. The aerodynamic characteristics of the iced leeward cylinder were stable when the ratio (L/D) of cylinder spacing was within the range of 4.8–6.2. The change of flow field should be considered in the stability analysis of two circular vertical cylinders. The drag coefficients of the iced leeward cylinder varied significantly due to the shielding effects, especially within the range of 9° attack angle and L< 6.2D. The results of this work can provide an experimental reference for future research on wind resistance of two circular cylindrical structures in engineering practice.

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来源期刊

Fluid Dynamics Research 物理-力学

CiteScore

2.90

自引率

6.70%

发文量

审稿时长

5 months

期刊介绍： Fluid Dynamics Research publishes original and creative works in all fields of fluid dynamics. The scope includes theoretical, numerical and experimental studies that contribute to the fundamental understanding and/or application of fluid phenomena.