| 引用本文: | 王鹿,李彪,罗志文,刘京.高度非均一建筑群拖曳力分布特性的风洞实验[J].哈尔滨工业大学学报,2025,57(10):93.DOI:10.11918/202409002 |
| WANG Lu,LI Biao,LUO Zhiwen,LIU Jing.Wind tunnel experimental study on the characteristics of drag force distribution for buildings with non-uniform heights[J].Journal of Harbin Institute of Technology,2025,57(10):93.DOI:10.11918/202409002 |
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| 高度非均一建筑群拖曳力分布特性的风洞实验 |
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王鹿1,李彪2,罗志文3,刘京4,5
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(1.昆明理工大学 建筑工程学院,昆明 650000;2.哈尔滨工业大学 能源科学与工程学院,哈尔滨 150001; 3.卡迪夫大学 威尔士建筑学院,卡迪夫CF10 1AA;4.哈尔滨工业大学 建筑与设计学院,哈尔滨 150001; 5.寒地城乡人居环境科学与技术工业和信息化部重点实验室(哈尔滨工业大学),哈尔滨 150006)
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| 摘要: |
| 城市环境中建筑群所受到的风拖曳力是复杂而关键的问题。目前,大部分研究将建筑群视为均一高度,忽略建筑群高度非均一性对拖曳力的影响。为此,提出高度分层处理方案计算高度非均一建筑群的截面拖曳力系数Cdz,引入截面修正系数βz,将高度均一建筑群的拖曳力系数修正为高度非均一建筑群的截面拖曳力系数Cdz,进而通过风洞实验研究建筑高度种类、层类型及层布局对建筑单体和建筑群截面拖曳力系数影响。结果表明:建筑高度非均一性显著影响气流的流动调整过程,当建筑高度种类N为2或3时,层布局 对βz的影响较小,当N增加至4时,交错式层布局的βz高于行列式层布局的βz；采用高度分层处理方案计算高度非均一建筑群的截面拖曳力系数,N≥4时,βz需进一步参数化。研究结果为实际城市建筑群的拖曳力估算提供理论支持,提高城市参数化方案的准确性,进而改善城市天气预报和污染物扩散计算的精度。 |
| 关键词: 非均一高度建筑群 截面拖曳力系数 风洞实验 高度分层处理方案 |
| DOI：10.11918/202409002 |
| 分类号:TU833 |
| 文献标识码:A |
| 基金项目:教育部“春晖计划”合作科研项目(HZKY20220298);国家自然科学基金(5187080901) |
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| Wind tunnel experimental study on the characteristics of drag force distribution for buildings with non-uniform heights |
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WANG Lu1,LI Biao2,LUO Zhiwen3,LIU Jing4,5
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(1.School of Architectural Engineering, Kunming University of Science and Technology, Kunming 650000, China; 2.School of Energy Science and Engineering, Harbin Institute of Technology, Harbin 150001, China; 3.Welsh School of Architecture, Cardiff University, Cardiff CF10 1AA, UK; 4.School of Architecture and Design, Harbin Institute of Technology, Harbin 150001, China; 5.Key Laboratory of Cold Region Urban and Rural Human Settlement Environment Science and Technology(Harbin Institute of Technology), Ministry of Industry and Information Technology, Harbin 150006, China)
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| Abstract: |
| The drag force of buildings in urban environment represent a complex and critical issue. Currently, most research usually regards buildings with uniform heights, ignoring the effect of the non-uniformity of building heights on the drag force distribution. To address this, this study proposes a height stratification method to calculate the sectional drag coefficient of buildings with non-uniform heights, Cdz. This method employs a sectional correction factor βz to adjust the drag coefficient of buildings with uniform heights to Cdz of buildings with non-uniform heights. Subquently, wind tunnel experiments are then conducted to investigate the effects of building height category N, layer type, and layout on the sectional drag coefficient of individual buildings and the total building array. The results show that the non-uniformity of building heights has a significant impact on the flow adjustment process. When the building height category, N, is 2 or 3, the layer layout has a minimal impact on βz. However, when N increases to 4, βz values of staggered layouts are higher than those of square layouts. When using the height stratification method to calculate Cdz of buildings with non-uniform heights, βz requires further parameterization if N≥4. The outcome of this study provide theoretical support for estimating drag force in urban buildings, enhancing the accuracy of building effect parameterization, and improving the precision of urban weather forecasting and pollutant dispersion calculations. |
| Key words: buildings with non-uniform heights sectional drag coefficient wind tunnel experiments height stratification method |
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