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
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.
杨群1,2，刘庆宽2,3，韩瑞1，刘小兵2,3. 不同圆角率的方形断面气动特性的雷诺数效应[J]. 振动与冲击, 2020, 39(4): 150-156.
YANG Qun1,2，LIU Qingkuan2,3，HAN Rui1，LIU Xiaobing2,3. Reynolds number effect of aerodynamic characteristics of square prism with different rounded corner ratios. JOURNAL OF VIBRATION AND SHOCK, 2020, 39(4): 150-156.
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