Structural characteristics of the supersonic turbulent boundary layer subjected to concave curvature

作者：Wang, Qian cheng; Wang, Zhen guo^*

来源：Applied Physics Letters, 2016, 108(11): 114102.

DOI：10.1063/1.4944536

By employing the Nanoparticle-based Planar Laser Scattering method and the particle image velocimetry, structural responses of a Mach 2.95 turbulent boundary layer to two concave curvatures (radiuses are 113mm and 350 mm, respectively) are experimentally investigated. Large scale vortices formed in the flat plate region are observed to break up into smaller ones immediately after they flow into the concave region. Larger curvature tends to introduce more immediate breakup of the vortices. Fractal analysis reveals that after the turning angle and impulse of bulk dilatation reach 11 degrees and 0.6, respectively, the breakup of the vortices slows down evidently.

• 出版日期2016-3-14
• 单位中国人民解放军国防科学技术大学