PIV measurements of the jet flows enhanced by tabs fixed on convergent-divergent (C-D) nozzles

作者：Zuo Xiu-juan · 年份：2004 · 研究领域：Aerodynamics and Acoustics in Jet Flows、Fluid Dynamics and Turbulent Flows、Computational Fluid Dynamics and Aerodynamics

To study the jet mixing enhancement by small tabs, a PIV system was used to conduct two-dimensional measurements of supersonic air jet flows exhausted from a convergent nozzle and two convergent-divergent (C-D) nozzles. The instantaneous quantitative velocity and vorticity fields were obtained to analyze the characteristics of the mixing process in the jet flow. It was found that the tabs fixed on C-D nozzles also enhanced the jet mixing distinctly, although the boundary layers of the jets from C-D nozzles were greater than that from the convergent nozzle. And the tabs intensified the circumferential vortices greatly in addition to the generation of streamwise vortices.