Journal of Jilin University(Engineering and Technology Edition) ›› 2023, Vol. 53 ›› Issue (6): 1677-1685.doi: 10.13229/j.cnki.jdxbgxb.20221343

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Size and shape effects of wind drag coefficients for porous structures

Feng WANG1(),Shuang-rui LIU1,Jia-ying WANG1,Jia-ling SONG2,Jun WANG1,Jiu-peng ZHANG1,Xiao-ming HUANG3   

  1. 1.School of Highway,Chang'an University,Xi'an 710064,China
    2.Research Center of Wind Engineering and Engineering Vibration,Guangzhou University,Guangzhou 510006,China
    3.School of Transportation,Southeast University,Nanjing 210018,China
  • Received:2022-10-19 Online:2023-06-01 Published:2023-07-23

Abstract:

In order to study the effects of pore size, pore spacing, pore shape and porosity on the application performance of porous structures such as wind barriers, a multi-parameter porous plate force wind tunnel test was carried out, and the effect of various parameters on the wind resistance coefficient of porous plates was compared. The flow field characteristics and pressure drop variation of porous plate under different parameters were analyzed by numerical simulation. The effects of pore size and pore spacing on the boundary layer thickness and effective porosity under the same porosity were discussed, and the results were compared with the wind tunnel test results. The following conclusions are obtained: the pore shape has little effect on the drag coefficient of porous plate. The aspect ratio, pore diameter and pore spacing have great influence on the drag coefficient of porous plate, which can be used as the key parameters affecting the resistance coefficient of porous structure.

Key words: bridge engineering, wind tunnel test, computational fluid dynamics, numerical simulation, porous structure, drag coefficie

CLC Number: 

  • TU312

Fig.1

Three sizes of porous plate models"

Table 1

Wind tunnel test conditions"

工况尺寸/(cm×cm)长宽比孔隙形状透风率/%
A1~A740×401∶1圆形0、10、20、30、40、50、60
B1~B780×201∶4圆形0、10、20、30、40、50、60
C1~C780×401∶2圆形0、10、20、30、40、50、60
D1~D780×401∶2方形0、10、20、30、40、50、60
E180×401∶2三角形30
F180×401∶2六边形30

Fig.2

Four hole shapes of porous plate models"

Fig.3

Three-component force of porous plate section"

Fig.4

Relationship between wind drag coefficient of porous plate and porosity rate under different length-width ratios"

Fig.5

Relationship between wind drag coefficient and inclination of porous plates with different pore shapes"

Fig.6

Establishment of the model"

Fig.7

Schematic diagram of test and CFD wind drag coefficient comparison"

Table 2

Comparison of wind tunnel test and numerical simulation"

长宽比孔形CD(风洞试验)CD(CFD)
1∶2圆形1.36301.2795
1∶2方形1.36951.2730
1∶4圆形1.17641.1445
1∶1圆形1.27751.1860

Fig.8

Windward side pressure distribution diagram"

Fig.9

Leeward side pressure distribution diagram"

Fig.10

Effect of hole arrangement on wind drag coefficient"

Table 3

Effect of pore size on wind drag coefficient"

长宽比孔形排列方式孔径/mmCD(CFD)
1∶2圆形均匀81.2984
1∶2圆形均匀121.2794
1∶2圆形均匀161.2599
1∶2圆形均匀201.2331

Fig.11

Effect of hole arrangement on velocity distribution"

Fig.12

Effect of pore size on velocity distribution"

Fig.13

Relationship between wind drag coefficient and porosity and pore size"

Table 4

Effect of the Reynolds number effect on the wind drag coefficient"

长×宽/(m×m)孔径/mm孔径雷诺数CD(CFD)
0.8×0.42013 796.791.233 1
8×4200137 967.91.226 4
1 Allori D, Bartoli G, Mannini C. Wind tunnel tests on macro-porous structural elements: a scaling procedure[J]. Journal of Wind Engineering and Industrial Aerodynamics, 2013, 123: 291-299.
2 李春光, 王龙, 韩艳, 等. 风屏障对流线型箱梁涡振性能影响机理试验研究[J]. 湖南大学学报:自然科学版, 2021, 48(11): 12-21.
Li Chun-guang, Wang Long, Han Yan, et al. Experimental study on influence of wind barrier permeability on characteristics of main girder vortex-induced vibration[J]. Journal of Hunan University(Natural Sciences), 2021, 48(11): 12-21.
3 Buljac A, Kozmar H, Pospíšil S, et al. Flutter and galloping of cable-supported bridges with porous wind barriers[J]. Journal of Wind Engineering and Industrial Aerodynamics, 2017, 171: 304-318.
4 Dong Z, Luo W, Qian G, et al. A wind tunnel simulation of the mean velocity fields behind upright porous fences[J]. Agricultural and Forest Meteorology, 2007, 146(1/2): 82-93.
5 Jr P A K, van Winkle M. Discharge coefficients through perforated plates[J]. AIChE Journal, 1957, 3(3): 305-312.
6 Jr P L S, van Winkle M. Discharge coefficients through perforated plates at Reynolds numbers of 400 to 3,000[J]. AIChE Journal, 1958, 4(3): 266-268.
7 Huang S, Ma T, Wang D, et al. Study on discharge coefficient of perforated orifices as a new kind of flowmeter[J]. Experimental Thermal and Fluid Science, 2013, 46: 74-83.
8 田红, 高旭, 汤珂, 等. 结构参数对多孔板低温流量计性能影响分析[J]. 低温工程, 2015(6): 43-48.
Tian Hong, Gao Xu, Tang Ke, et al. Influence of geometric parameters on performance of a cryogenic fluid flowmeter with perforated plate[J]. Cryogenics, 2015(6): 43-48.
9 王慧锋, 凌长玺. 几何特征对多孔板特性的影响[J]. 华东理工大学学报:自然科学版, 2015, 41(5): 677-685.
Wang Hui-feng, Ling Chang-xi. Effect of general geometric characteristics for multi-hole orifices'features[J]. Journal of East China University of Science and Technology(Natural Science Edition), 2015, 41(5): 677-685.
10 赵天怡, 张吉礼. 多孔孔板节流特性主效应因素试验[J].哈尔滨工业大学学报, 2007, 39(12): 1878-1881.
Zhao Tian-yi, Zhang Ji-li. Experimental study on main factor affecting throttling characteristic for multi-hole orifice[J]. Journal of Harbin Institute of Technology, 2007, 39(12): 1878-1881.
11 韩伟, 董志勇, 邴斌, 等. 多孔板压力特性的试验研究[J].水力发电学报, 2014, 33(6): 126-131.
Han Wei, Dong Zhi-yong, Bing Bin, et al. Experimental study of pressure characteristics behind multi-orifice plates[J]. Journal of Hydroelectric Engineering, 2014, 33(6): 126-131.
12 马有福, 王凡, 吕俊复. 孔数与孔厚对多孔板压损系数的影响机理[J]. 化工进展, 2020, 39(2): 446-452.
Ma You-fu, Wang Fan, Jun-fu Lü. Influencing mechanism of orifice number and thickness on pressure loss coefficient of multi-orifice plates[J]. Chemical Industry and Engineering Progress, 2020, 39(2): 446-452.
13 李艺, 苏悦琦. 基于不同孔径范围的碳化作用下纤维混凝土的气体渗透性能和细观结构[J]. 吉林大学学报:工学版, 2021, 51(4): 1287-1295.
Li Yi, Su Yue-qi. Gas permeability and meso-structure of fiber reinforced concrete under carbonation based on different pore sizes[J]. Journal of Jilin University (Engineering and Technology Edition), 2021, 51(4): 1287-1295.
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