【作者】 王元靖； 范召林； 李浩；

【Author】 WANG Yuan-jing,FAN Zhao-lin,LI Hao (Center of Aerodynamic Research and Dept.of China,Mianyang 622661,China)

【机构】 中国空气动力研究与发展中心高速所；

【摘要】 在低速风洞中利用测力、测压的手段,研究了亚临界雷诺数对不同缩比细长旋成体模型大攻角非对称流动的影响。结果表明:亚临界雷诺数范围内,风速带来的雷诺数变化与模型尺度改变的雷诺数不能简单等同。风速的增加通过改变馈送涡丝环量而影响大攻角非对称流动强度;模型直径影响背风涡的距离和稳定性,导致不同缩比模型的非对称流动特性差异明显。更多还原

【Abstract】 Investigation of sub-critical Reynolds number effect on flow asymmetry over different scale slender bodies at high incidence was conducted in low speed wind tunnel.Results show that velocity and model scale can both change sub-critical Reynolds number,but these two kinds of effect can not be equated with each other blindly at high incidence.Increasing of velocity affects the flow asymmetry by changing the intensity of the vortices;Diameter of slender bodies affects the distance between the main vortices,which determines the stability of the vortices,resulting in prominent discrepancy of flow asymmetry over different scale models.更多还原