摘要In order to study the aerodynamic interference effects of single and multiple blunt bodies on the rectangular, reverse right angle, reverse inner convex arc, and reverse outer convex arc sections of serial bluff bodies, the finite volume method and the SIMPIE algorithm, the uniform viscous incompressible flow around blunt bodies at a subcritical Reynolds number was simulated by computational fluid dynamics (CFD) technology. The aerodynamic coefficient was analyzed, and the aerodynamic coefficients under various conditions (e.g. different wind angles of attack, chamfer dimensions, and cylinder spacing) were calculated. Results show that the drag and lift, as well as the torque coefficients, of each section of a single blunt decrease in accordance with the sequence of wind flow around the rectangular, reverse right angle, reverse inner convex arc, and reverse outer convex arc sections at different wind angles of attack. The drag and lift, as well as the torque coefficient, of the reverse right angle, reverse inter convex arc, and reverse outer convex arc sections successively decrease with increasing chamfer dimensions. The downstream blunt body produces more significant changes than does the upstream blunt body in terms of variation trend and value because of the aerodynamic interference effect.
Abstract：In order to study the aerodynamic interference effects of single and multiple blunt bodies on the rectangular, reverse right angle, reverse inner convex arc, and reverse outer convex arc sections of serial bluff bodies, the finite volume method and the SIMPIE algorithm, the uniform viscous incompressible flow around blunt bodies at a subcritical Reynolds number was simulated by computational fluid dynamics (CFD) technology. The aerodynamic coefficient was analyzed, and the aerodynamic coefficients under various conditions (e.g. different wind angles of attack, chamfer dimensions, and cylinder spacing) were calculated. Results show that the drag and lift, as well as the torque coefficients, of each section of a single blunt decrease in accordance with the sequence of wind flow around the rectangular, reverse right angle, reverse inner convex arc, and reverse outer convex arc sections at different wind angles of attack. The drag and lift, as well as the torque coefficient, of the reverse right angle, reverse inter convex arc, and reverse outer convex arc sections successively decrease with increasing chamfer dimensions. The downstream blunt body produces more significant changes than does the upstream blunt body in terms of variation trend and value because of the aerodynamic interference effect.
基金资助:Supported by the National Natural Science Foundation of China (No.51208471);the China Postdoctoral Science Foundation (No.2011M501190);the Specialized Research Fund for the Doctoral Program of Higher Education of China(No.20114101120008);and the Natural Science Research Projects of Education Department of Henan Province (No.12A560010)
通讯作者:
LI Sheng-li, lsl2009@126.com
E-mail: lsl2009@126.com
引用本文:
李胜利, 路毓, 王东炜. 串列钝体三分力系数气动干扰效应数值模拟[J]. Journal of Highway and Transportation Research and Development, 2013, 7(3): 53-61.
LI Sheng-li, LU Yu, WANG Dong-wei. Numerically Simulating the Aerodynamic Interference Effect of Mean Aerodynamic Force Coefficients on Configurations of Bluff Bodies in Tandem. Journal of Highway and Transportation Research and Development, 2013, 7(3): 53-61.
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2013, Vol. 7 
