The aim of the paper is to present some practical aspects of PIV recording set-ups which are not often discussed in the literature. After a short presentation of the different possible light sources available, emphasis is put on the Nd:YAG laser which has contributed to the strong evolution of PIV. Then the elements needed to realize a light sheet from a laser source are presented and discussed. Finally, the basic optics knowledge needed to record good particle images is recalled with emphasis on points of importance for PIV.
This study focuses on the corner flow separation occurring in a simplified wing-body junction composed of a NACA0015 twisted wing mounted on a flat plate at a Reynolds number based on the wing chord of Re c 1.2 × 10 6 . Wind-tunnel test measurements are carried out in the corner area including extensive oil-flow visualizations, high speed particle image velocimetry and unsteady pressure sensors. The analysis of the experimental database shows that the corner flow separation creates mean flow distortions that induce high anisotropy in the Reynolds stresses and turbulent kinetic energy. The wall pressure spectra show a broadband hump associated with the corner flow separation at St δ 0.04, based on the incoming boundary layer thickness. A sensitivity study indicates the progressive growth of the corner flow separation with increasing angle of attack, leading to complete wing stall and the delay of the corner flow separation onset when the incoming boundary layer is thicker.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.