Abstract
PIV measurements and computational simulations (2D, unsteady Navier-Stokes) are performed to visualize the inherently unsteady jet oscillation inside a fluidic oscillator. Both the measurements and computations are obtained for a jet exit Reynolds number of 321, based on the maximum velocity and the nozzle width at the jet exit plane. The computed jet oscillation frequency is in close agreement with the measured PIV frequency. Formation of a pressure gradient across the jet is observed from the computations. The variation of the jet oscillation frequency with jet exit Reynolds number is also determined by single sensor hot-wire measurements inside the oscillation chamber.
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Oguz Uzol: He received his BS degree in 1992 and MS degree in 1995 in Aeronautical Engineering from The Middle East Technical University in Ankara, Turkey. He received his Ph.D. in Aerospace Engineering from Pennsylvania State University in 2000. Currently he is a Post-Doctoral Fellow in the Department of Mechanical Engineering at Johns Hopkins University. His research interests cover experimental fluid mechanics and heat transfer, Particle Image Velocimetry measurements in turbomachinery and unsteady turbomachinery flow fields, internal and external heat transfer enhancement in gas turbines.
Cengiz Camci: He received his BSc (Eng.) degree in Mechanical Engineering from Istanbul Technical University in 1977, MSc (Eng.) degree from Bogazici University in 1979. He attended a one year postgraduate Diploma Course in the Turbomachinery Department of the von Karman Institute for Fluid Dynamics (VKI) in 1980. His doctoral studies included film cooling of gas turbine blades under realistic gas turbine conditions and convective heat transfer in short duration heat transfer facilities. He obtained his doctoral degree from the Katholieke Universiteit Leuven in Belgium for the thesis prepared at the von Karman Institute in 1985. He joined the Department of Aerospace Engineering at Pennsylvania State University as a faculty member in 1986. He is currently a professor of Aerospace Engineering at Pennsylvania State University. His current research interests are turbomachinery aerodynamics/heat transfer and experimental and computational fluid mechanics. His present research involves using turbomachinery research facilities, aerodynamic probe development, particle image velocimetry, liquid crystal thermography, flow visualization and computational flow visualization.
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Uzol, O., Camci, C. Experimental and computational visualization and frequency measurements of the jet oscillation inside a fluidic oscillator. J Vis 5, 263–272 (2002). https://doi.org/10.1007/BF03182334
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DOI: https://doi.org/10.1007/BF03182334