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Flow mapping of a jet in crossflow with Stereoscopic PIV

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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.

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Authors and Affiliations

  1. Department of Mechanical Engineering, Technical University of Denmark, DK-2800, Lyngby, Denmark

    Meyer K. E.

  2. Department of Aeronautics and Astronautics, Technical University of Istanbul, 80626, Istanbul, Turkey

    Özcan O.

  3. Dantec Dynamics A/S, Tonsbakken 16-18, DK-2740, Skovlunde, Denmark

    Westergaard C. H.

Authors
  1. Meyer K. E.
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  2. Özcan O.
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  3. Westergaard C. H.
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Additional information

Knud Erik Meyer: He received his Ph.D. degree from Technical University of Denmark in 1994 on a study of heat transfer in tube bundles involving both experiments and CFD calculations. He is now an associate professor in experimental fluid mechanics. Present research interests are optical flow measurements (LDA, PIV, LIF) and a number of industrial flow applications.

Oktay Özcan: He received his Ph.D. degree in Mechanical Engineering in 1982 from the University of California at Berkeley. He worked at the NASA-Ames Research Center as a postdoctoral research associate in 1982–1983 and also in 1988–1990. He was a visiting professor in the Departments of Energy and Mechanical Engineering at Technical University of Denmark between 1999 and 2001.

Carsten H. Westergaard: He received his M.Sc. degree in Mechanical Engineering in 1991 from the Technical University of Denmark and his Ph.D. in 1994 within optical measurements of turbulent structures, specifically particle image velocimetry. The work included high-resolution measurements in turbulent pipeflows at the lab. of Prof. Adrian at University of Illinois and development of optical correlation techniques based on photorefractive crystal with Prof. Buchhave at the Physics Dept., DTU. Later, he worked in Danish wind turbine industry performing calculations and measurements within the fields of aerodynamics, aeroacoustics, aeroelasticity and structural dynamics for wind turbine blades. Through a number of EC projects, CFD applied to wind turbines was studied. Today he is product manager for PIV and related products at Dantec Dynamics.

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Meyer, K.E., Özcan, O. & Westergaard, C.H. Flow mapping of a jet in crossflow with Stereoscopic PIV. J Vis 5, 225–231 (2002). https://doi.org/10.1007/BF03182330

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  • DOI: https://doi.org/10.1007/BF03182330

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