摘要
文中基于流体计算软件Fluent,采用Realizable k-ε湍流模型,对高雷诺数(Re=6.8×10^(5))下梯形柱的绕流特性进行数值模拟,通过对不同宽高比与不同偏角(迎风面与来流方向的夹角)的梯形柱进行流场分析与研究,获得不同结构特征参数下梯形柱的气动参数以及流场绕流特性。结果表明:当偏角不变时,随着宽高比的增加,阻力系数、升力系数均方根逐渐减小,斯托罗哈数先增加后减小;当宽高比不变时,随着偏角的增加,阻力系数、升力系数均方根、斯托罗哈数逐渐增加。与同宽高比下的矩形柱相比,在宽高比R=0.5时梯形柱的阻力系数大于矩形柱,在宽高比R=0.6~1.0时矩形柱的阻力系数大于梯形柱。
Based on the fluid calculation software Fluent,the Realizable k-εturbulence model is used to numerically simulate the flow characteristics of trapezoidal columns at a high Reynolds number(Re=6.8×10^(5)).Through the flow field analysis and research of trapezoidal columns with different aspect ratios and different deflection angles(the angle between windward face and incoming flow direction),the aerodynamic parameters and flow characteristics of trapezoidal columns with different structural characteristics are obtained.The results show that when the deflection angle is constant,with the increase of the aspect ratio,the root mean square of the drag coefficient and lift coefficient gradually decreases,and the Storrow's Hardness first increases and then decreases.When the aspect ratio is constant,with the increase of deflection angle,the drag coefficient,the root mean square of lift coefficient and the Storrow Hardness gradually increase.Compared with rectangular columns with the same aspect ratio,the resistance coefficient of trapezoidal columns is larger than that of rectangular columns when the aspect ratio R=0.5,and the resistance coefficient of rectangular columns is larger than that of trapezoidal columns when the aspect ratio R=0.6~1.0.
作者
田洪森
程文明
杜润
王书标
Tian Hunsen;Cheng Wenming;Du Run;Wang Shubiao
出处
《起重运输机械》
2022年第10期30-36,共7页
Hoisting and Conveying Machinery
基金
大型起重机仿生结构风致效应特性及抗风减载机理研究(51675450)。
