INVESTIGATION OF COHERENT STRUCTURES IN A TURBULENT SHEAR LAYER USING SURFACE HOT-FILM ANEMOMETERS
P.A. Polivanov1,2, V.V. Markin1, E.A. Merkulova1, D.A. Buntin1
1Khristianovich Institute of Theoretical and Applied Mechanics, Siberian Branch of the Russian Academy of Sciences (ITAM SB RAS), Novosibirsk, Russia
2Novosibirsk State Technical University, Novosibirsk, Russia
Keywords: boundary layer, separated flow, coherent structure, film sensor, hot-wire anemometer, PIV
Abstract
Results of an experimental investigation of coherent structures in a shear layer, obtained using different approaches, are presented. Characteristic length scales are determined via combined processing of data from single-wire and surface hot-film anemometers and PIV measurements. The combined PIV and surface anemometry approach allows one to identify regions where the flow parameters correlate with the readings of the surface sensors. The joint analysis of data from the surface sensors and PIV enabled determination of the optimal location of the surface sensors relative to the separation region for the development of active closed-loop flow control techniques.
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