建筑物顶部锥形涡空间演化的数值模拟

李鹏年; 邹正平; 陈学锐; 顾志福

建筑物顶部锥形涡空间演化的数值模拟

1.
北京航空航天大学能源与动力工程学院航空发动机气动热力重点实验室, 北京 100083
2.
北京航空航天大学航空发动机数值仿真研究中心, 北京 100083
3.
北京大学力学与工程科学系, 北京 100871

基金项目: 国家自然科学基金资助(10172008)

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出版历程
- 收稿日期: 2005-08-04
- 修回日期: 2005-11-02
- 刊出日期: 2006-10-28

Numerical study of conical vortices space evolvement on a flat roof

1.
National Key Laboratory on Aero-Engines, School of Jet Propulsion, Beijing University of Aeronautics and Astronautics, Beijing 100083, China
2.
Aeroengine Numerical Simulation Research Center, Beijing University of Aeronautics and Astronautics, Beijing 100083, China
3.
Department of Mechanics and Engineering Science, Peking University, Beijing 100871, China

摘要

摘要: 运用通用流体力学计算软件FLUENT,对建筑物表面风荷载问题进行了数值模拟,讨论和分析了采用不同湍流模型获得的结果差异。通过与风洞实验结果的对比,选择了v²-f湍流模型对40°风向角建筑物顶面出现锥形涡现象进行了成功的模拟。进而利用数值模拟的优势给出了典型建筑物顶面锥形涡的空间演化规律及其和侧面脱体涡的相互作用。还获得了锥形涡的演化、强度和位置与建筑物表面压力分布的内在联系。
- 航空、航天推进系统 /
- k-ε湍流模型 /
- v²-f湍流模型 /
- 锥形涡 /
- 数值模拟
Abstract: Using the computational fluid dynamics software FLUENT,wind load and conical vortices of a building were simulated with the v²-f turbulence model and k-ε turbulence model.The wind angle of attack is 40° relative to the eave of the building.It shows that the v²-f turbulence model can give fairly good results compared to the experimental pressure data.With the increase of x,the sizes of the conical vortices on the flat roof increase firstly and then fall off when they arrive at the ackside of the building.Simultaneously conical vortices and the vortex shed from the lateral wall of the building have great interaction.Also it gets the immanence relation of the space evolvement,intensity and positions of the conical vortices on the flat roof.
- aerospace propulsion system /
- k-ε turbulence model /
- v²-f turbulence model /
- conical vortices /
- numerical simulation

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参考文献(7)

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