建筑结构投稿登录
  
您现在的位置:建筑结构>> 期 刊>> 2018年>> 第06期>>正文内容
复杂树状结构CFD数值模拟研究*
吴颖1,李秋胜1,2,陈伏彬3
摘 要

(1 湖南大学土木工程学院, 长沙 410082; 2 香港城市大学建筑学与土木工程学系, 香港 999077; 3 长沙理工大学土木与建筑学院, 长沙 410082)

[摘要]以珠海华发艺术馆为工程背景,通过在数值模拟平台上建立数值风洞模型,对工程中的复杂树状结构进行CFD数值模拟研究。数值模拟中基于RANS湍流模型,着重对各树状结构树冠部分的风压分布情况及艺术馆内行人高度处风环境情况进行研究,并将其中两个典型树状结构树冠部分的表面风压分布情况的模拟结果与风洞试验进行了对比,研究结果表明:数值模拟计算方法能够较为准确地预测复杂树状结构平均风压分布情况及艺术馆馆内的流场信息;各树树冠部分的风压分布情况受附近树状结构以及艺术馆的干扰较大,这点对树顶标高较大的树状结构体现得尤为明显;结合珠海市多年气象资料,艺术馆整体风环境情况较好,仅在部分区域由于狭管效应出现了风速比较大的情况。

[关键词]树状结构; 数值模拟; 风洞试验; 风压分布; 建筑风环境

中图分类号:TU973+-32文献标识码:A文章编号:1002-848X(2018)06-0087-05

 

Numerical simulation study on complex tree-shaped structures based computational fluid dynamics method

Wu Ying1, Li Qiusheng1,2, Chen Fubin3

(1 College of Civil Engineering, Hunan University, Changsha 410082,  China; 2 Department of Architecture and Civil Engineering, City University of Hong Kong, Hong Kong 999077, China; 3 College of Civil Engineering and Architecture, Changsha University of Science & Technology, Changsha 410082, China)

Abstract:Based on the engineering background of Huafa Art Museum in Zhuhai, the complex tree-shaped structures in the museum were numerically simulated by the means of computational fluid dynamics method (CFD) through constructing appropriate numerical wind tunnel model on numerical platform. By using  turbulence model(RANS)  in the simulation, the wind pressure distributions on the tree crown of each tree-shaped structure and wind environment conditions on the pedestrian level in the main building of the museum were emphatically discussed, and a comparison about the wind pressure distribution on the tree crown of two typical tree-shaped structures was made between numerical predictions and wind tunnel test results. The results  indicate that numerical simulation method can accurately predict the wind pressure distribution on complex tree-shaped structures as well as the flow field information in the museum; the wind pressure distribution on each tree crown is mostly interfered by neighboring tree structures and the museum, which is particularly evident on the higher tree-shaped structures; combining with the meteorological data in Zhuhai, the general wind environment of the museum is considered to be favorable except that the wind speed ratio in some regions is comparatively bigger because of the channeling effect. 

Keywords:tree-shaped structure; numerical simulation; wind tunnel test; wind pressure distribution; building wind environment

 

*国家自然科学基金项目(51408062,51478405),湖南省创新平台与人才计划项目(2015RS4050),中国博士后基金(2015M572238)。

 

作者简介:吴颖,硕士,工程师,Email:wuyingengineer@126.com。

下载地址