Aerodynamic control of tall building due to the streamwise vortices.

流向涡流对高层建筑的空气动力控制。

• 批准号: 06555170
• 负责人: TAMURA Tetsuro
• 金额: $ 3.39万
• 依托单位: Tokyo Institute of Technology
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Developmental Scientific Research (B)
• 财政年份: 1994
• 资助国家: 日本
• 起止时间: 1994 至 1995
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-06555170/
• 关键词: tall building; aerodynamic control; wind tunnel testing; unsteady aerodynamic forces; streamwise vortices; Karman vortices; computational fluid dynamics; flow visualization; 流れのシミュエーション

For the control of vortex-shedding and separated flows from bluff cylinders, the detailed patterns of the periodic vortex motions should be investigated. This phenomenon causes the large aerodynamic forces. Various efficient methods are required to reduce the input unsteady forces. First method is the aerodynamic control due to variations of the section shapes of a bluff cylinder. Second one is the control of the separated shear layrs from a square cylinder by the vortex generator. Here we have proposed the vortex generator attached to the chamfered surface of a square cylinder, where it is recognized that the strong streamwise vortices generated at the frontal corner interact with the lateral vortices shed from the cylinder. I also bring into focus their physical mechanism. The effectiveness of the control of the separated shear layrs due to the streamwise vortices is discussed, through the comparison between the experimental and computational data.

为了控制涡流脱落和钝圆柱体的分离流，应研究周期性涡流运动的详细模式。这种现象导致很大的空气动力。需要各种有效的方法来减少输入的不稳定力。第一种方法是通过钝体气缸截面形状的变化进行空气动力学控制。第二个是通过涡流发生器控制方形圆柱体上分离的剪切层。在这里，我们提出了将涡流发生器附加到方形圆柱体的倒角表面上，其中认识到在前角处产生的强流向涡流与从圆柱体流出的横向涡流相互作用。我还重点关注了它们的物理机制。通过实验数据和计算数据的比较，讨论了流向涡流导致的分离剪切层控制的有效性。

项目成果

田村 哲郎: "構造物の耐風工学" 日本鋼構造協会, 426 (1995)

田村哲郎：《结构的抗风工程》日本钢结构学会，426（1995）

田村哲郎: "流体計算と風荷重評価" 日本建築学会, 291 (1994)

田村哲朗：《流体计算与风荷载评估》日本建筑学会，291（1994）

田村 哲郎: "扁平角柱まわりの流れと風圧力の三次元解析" 日本建築学会構造系論文集. 474. 41-48 (1995)

Tetsuro Tamura：“扁平矩形柱周围流动和风压的三维分析”日本建筑学会结构工程论文集 474. 41-48 (1995)。

Tetsuro Tamura, Yoshiaki Itoh and Akira Wada: "Three-dimensional Simulations of Flow and Pressure around an Elongated Rectangular Cylinder." J.Struct.Constr.Eng., Trans.AIJ. No.474. 41-48 (1995)

Tetsuro Tamura、Yoshiaki Itoh 和 Akira Wada：“细长矩形圆柱体周围流动和压力的三维模拟”。

Tetsuro Tamura: "Three-dimensional simulations of an oscillating rectangular cylinder" Proc.6th Int.Conference on Flow-Induced Vibration. 181-192 (1995)

Tetsuro Tamura：“振荡矩形圆柱体的三维模拟”Proc.6th Int.Conference on Flow-Induced Vibration。