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1 Turbulence : international journal

1 2000

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Application of hot-film sensors in analysis of wake induced boundary layer

Elsner W., Wysocki M., Sobczyk A.

Turbulence : international journal

2000

Vol. 6-7

175-186

The paper presents an experimental analysis of the development of the unsteady boundary layer on a stator turbine blade. Upstream rotor wakes were generated by the rotating wheel of cylindrical rods. During the experiment three different cases with various wake-passing frequencies were tested and the boundary layer has been investigated with the use of surface mounted hot-films gauges. Analysis of the wall shear stresses presented in the paper reveals the high receptivity of boundary layer to periodical disturbances, which was documented among the others by the shift of laminar--turbulent transition zone from the region close to trailing edge upstream the flow.