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| Reynolds number effect of aerodynamic characteristics of square prism with different rounded corner ratios |
| YANG Qun1,2，LIU Qingkuan2,3，HAN Rui1，LIU Xiaobing2,3 |
1.School of Civil Engineering, Shijiazhuang Tiedao University, Shijiazhuang 050043, China;
2.Innovation Center for Wind Engineering and Wind Energy Technology of Hebei Province, Shijiazhuang 050043, China;
3.Wind Engineering Research Center, Shijiazhuang Tiedao University, Shijiazhuang 050043, China |
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Abstract Aerodynamic characteristics of standard square prisms and square prisms with rounded corner ratio 0.1, 0.2, 0.3 and 0.4 were tested through rigid model pressure-measured wind tunnel tests in a uniform wind filed.The Reynolds number Re ranges from 0.8×105 to 3.8×105.The results show that for standard square prisms, the Reynolds number effect is very weak for mean drag coefficient, mean lift coefficient, Strouhal number, and obvious for fluctuating value of lift coefficient.For square prisms with rounded corner ratio 0.1, the Reynolds number effect is slight for mean drag coefficient, mean lift coefficient, Strouhal number, and obvious for fluctuating value of lift coefficient.For square prisms with rounded corner ratio 0.2, 0.3 and 0.4, the Reynolds number effect is significant for mean drag coefficient, mean lift coefficient, Strouhal number and weak for fluctuating value of lift coefficient.Around critical Reynolds number, mean drag coefficient, mean lift coefficient, and Strouhal number change dramatically.
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Received: 10 June 2018
Published: 15 February 2020
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[1] Yi Li，Xiang Tian，Kong Fah Tee，et al. Aerodynamic treatments for reduction of wind loads on high-rise buildings[J]. Journal of Wind Engineering and Industrial Aerodynamics, 2018, 172: 107-115.
[2] 刘庆宽，邵奇，郑云飞，等． 雷诺数对圆柱气动力和流场影响的试验研究[J]． 实验流体力学，2016，30( 4) : 7-13．
Liu Q K，Shao Q，Zheng Y F，et al． Experimental study on Reynolds number effect on aerodynamic pressure and forces of cylinder[J]. Journal of Experiments in Fluid echanics，2016，30( 4) : 7-13．
[3] 马文勇，袁欣欣，张晓斌，等. 圆形断面在35k~330k雷诺数范围的气动力特性研究[J]. 工程力学，2015， 32(suppl) : 348-352
MA Wenyong , YUAN Xinxin , ZHANG Xiaobin ,te al. Characteristics of aerodunamic forces on a circular cylinder at reynolds numbers feom 35k to 330k[J]. Eengineering mechanics, 2015， 32(suppl) : 348-352
[4] Shuguo Liang, Yin Chen, Huaiqiang Tang, Fuyou Xu. Investigation of Reynolds number effect of wind pressure on square cylinder by wind tunnel test. Proceedings of the 13th International Conference on Wind Engineering, 2013
[5] Muk Chen Ong, Torbjørn Utnes, Lars Erik Holmedal, Dag Myrhaug, Bjørnar Pettersen. Numerical simulation of flow around a smooth circular cylinder at very high Reynolds numbers. Marine Structures, 2009, 22:142-153
[6] 顾明，王新荣. 工程结构雷诺数效应的研究进展[J]. 同济大学学报（自然科学版）, 2013, 41(7): 961-969.
Gu Ming, Wang Xinrong. Research Progress of Reynolds Number Effect of Engineering Structures[J]. Journal of Tongji University (Natural Science), 2013, 41(7): 961-969.
[7] 祝志文，邓燕华，陈魏. 圆柱高Re数绕流特性的大涡模拟研究[J]. 振动工程学报, 2014, 27(1): 51-59.
Zhu Zhiwen, Deng Yanhua, Chen Wei. Large eddy simlation of flow around circular cylinder under high Reynolds number[J]. Journal of Vibration Engineering, 2014, 27(1): 51-59.
[8] Yong Cao，Tetsuro Tamura. Aerodynamic characteristics of a rounded-corner square cylinder in shear flow at subcritical and supercritical Reynolds numbers[J]. Journal of Fluids and Structures, 2018, 82: 473-491.
[9] Luigi Carassale，Andrea Freda，Michela Marrè-Brunenghi. Experimental investigation on the aerodynamic behavior of square cylinders with rounded corners[J]. Journal of Fluids and Structures, 2014, 44: 195-204.
[10] Nils Paul van Hinsberg，Günter Schewe，Markus Jacobs. Experiments on the aerodynamic behaviour of square cylinders with rounded corners at Reynolds numbers up to 12 million[J]. Journal of Fluids and Structures, 2017, 74: 214-233.
[11] 王新荣，顾明. 角部处理的二维方柱风压分布特性的试验研究[J]. 土木工程学报, 2016, 49(7): 10.
Wang Xinrong, Gu Ming. Experimental study on wind pressure distributions of 2-D square prisms with various corner treatments[J]. China Civil Eengineering Journal, 2016, 49(7): 10.
[12] Tetsuya Miyagi Tetsuro Tamura. The effect of turbulence on aerodynamic forces on a square cylinder with various corner shapes[J]. Journal of Wind Engineering and Industrial Aerodynamics, 1999, 83
[13] 郑云飞，刘庆宽，马文勇，等. 端板对二维矩形风洞试验模型气动特性的影响[J]. 实验流体力学, 2017, 31(3): 38-45.
Zheng Yunfei, Liu Qingkuan, Ma Wenyong, Liu Xiaobing. Effects of end plates on aerodynamic force of rectangular prisms in wind tunnel test[J]. Journal of Experiments in Fluid Mechanics, 2017, 31(3): 38-45.
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