同济大学学报（自然科学版）2009，Vol.37Issue(7)：857-861,892,6.DOI:10.3969/j.issn.0253-374x.2009.07.002
方柱绕流粒子图像测速试验与数值模拟
Particle Image Velocimetry Study and Numerical Simulation of Turbulent near Wake of Square Cylinder
摘要
Abstract
The result of the experiment of vortex shedding from a square cylinder is important in comparing the precision of different models including Reynolds averaged Navior-Stokes(RANS) models in computational fluid dynamics(CFD). The experiment of vortex shedding from a square cylinder with the Reynolds number of 2.2×104 is done using particle image velocimetry (PIV). A comparison with the results of Laser Doppler Velocimetry(LDV) experiments carried out by other researchers in the same Reynolds number shows that the PIV instruments is effective in obtaining turbulent wake of bodies. Comparisons are also conducted with different RANS models(Realizable k-ε model,k-ω shear stress transport(SST) model and Reynolds stress model) of the coefficients of damping ratio,strouhal number and the velocity profiles and turbulent kinetic energy profiles. It is discovered that the result of the k-ω SST model is much more precise in the aerodynamic parameter identification and flow field simulation mentioned above.关键词
方柱绕流/雷诺时均湍流模型/粒子图像测速技术(PIV)/阻力系数/斯特劳哈尔数/湍动能Key words
square cylinder/Reynoids averaged Navior-Stokes model/particle image velocimeting/damping coefficient/Strouhal number/turbulent kinetic energy分类
交通工程引用本文复制引用
张伟,葛耀君..方柱绕流粒子图像测速试验与数值模拟[J].同济大学学报（自然科学版）,2009,37(7):857-861,892,6.基金项目
国家自然科学基金重点资助项目(50538050) （50538050）
国家"八六三"高技术研究发展计划资助项目(2006AA11Z108) （2006AA11Z108）
国家自然科学基金资助项目(50608059) （50608059）
