Behavior of horseshoe vortex at wing/end wall junction with attack angle (2nd report, effect of attack angle on vorticity and Reynolds stress transport)

摘要

This paper presents the response of vorticity and Reynolds stress transport in the horseshoe vortex at a flat wing end wall junction. The measurements using the specially designed triple hot wire anemometer simultaneously provide three components of mean velocity and six components of Reynolds stress. The horseshoe vortex moves away from the wing end wall junction by convection and diffusion of the secondary flow. The vortex becomes large because of the diffusion of turbulence. The rotation velocity of the vortex is large at the pressure side of the wing and the vorticity decays due to the stretching mechanism. The location of Reynolds stress, -{the top of uv}, which takes a negative value does not correspond to the region of the negative mean velocity gradient upstream.