Flow Mapping of a Jet in Crossflow with Stereoscopic PIV

Article type: Research Article

Authors: Meyer, K.E. | Özcan, O. | Westergaard, C.H.

Affiliations: Department of Mechanical Engineering, Technical University of Denmark, DK-2800 Lyngby, Denmark. | Department of Aeronautics and Astronautics, Technical University of Istanbul, 80626 Istanbul, Turkey.

Abstract: Stereoscopic Particle Image Velocimetry (PIV) has been used to make a three-dimensional flow mapping of a jet in crossflow. The Reynolds number based on the free stream velocity and the jet diameter was nominally 2400. A jet-to-crossflow velocity ratio of 3.3 was used. Details of the formation of the counter rotating vortex pair found behind the jet are shown. The vortex pair results in two regions with strong reversed velocities behind the jet trajectory. Regions of high turbulent kinetic energy are identified. The signature of the unsteady shear layer vortices is found in the mean vorticity field.

Keywords: jet in crossflow, stereoscopic PIV, flow mapping

Journal: Journal of Visualization, vol. 5, no. 3, pp. 225-231, 2002