摘要
利用流体分析软件Fluent计算了不同桥梁断面型式在中等雷诺数时和不同攻角下的阻力系数和升力系数。文中选用6类不同桥梁断面型式进行了计算分析。通过计算得出的阻力、升力系数随攻角的变化对比以及风场压力云图直观反映,初步分析了各类断面在静风作用下三分力系数值的特性。计算结果表明,钝体断面其阻力系数的变化形式相似,而上下不对称开口会造成其升力系数的变化;而流线型断面,其阻力系数与钝体断面截然不同,与攻角有直接的关系,实际应用需要多注意。
This article uses fluid analysis software Fluent to calculate the resistance coefficient and lift coefficient in medium Reynolds number and different attack angle. Six different types of bridge sections are calculated and analyzed. With the contrast of the change of calculated resistance and lift coefficient, and directly reflection of wind pressure cloud, preliminary analyzes the value characteristic of three - component force coefficient of various sections in static wind. The results show that the change form of resistance coefficient in blunt body section is similar, and the upper and lower asymmetric opening will cause the lift coefficient changes; to streamlined section, the resistance coefficient is distinct different to blunt body section and is directly related to the attack angle , need more attention in practical applications.
出处
《内蒙古公路与运输》
2012年第4期30-33,共4页
Highways & Transportation in Inner Mongolia
关键词
CFD
静三分力系数
主梁断面
风攻角
CFD
static three - component force coefficient
girder section
wind attack angle
