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Experimental investigation of the log-law for an adverse pressure gradient turbulent boundary layer flow at Reθ up to 10000

DOI: 10.1615/ICHMT.2012.ProcSevIntSympTurbHeatTransfPal.510
pages 457-468

Tobias Knopp
Institute of Aerodynamics and Flow Technology German Aerospace Center (DLR) Bunsenstr. 10, 37073 Gottingen, Germany

Daniel Schanz
Institute of Aerodynamics and Flow Technology German Aerospace Center (DLR) Bunsenstr. 10, 37073 Gottingen, Germany

Andreas Schroder
Institute of Aerodynamics and Flow Technology German Aerospace Center (DLR) Bunsenstr. 10, 37073 Gottingen, Germany

M. Dumitra
Inst. for Fluid Mechanics and Aerodynamics, Universitat der Bundeswehr Munchen (UniBw), Werner-Heisenberg-Weg 39, 85577Neubiberg, Germany

Christian J. Kahler
Institute for Fluid Mechanics and Aerodynamics Universitat der Bundeswehr Munchen (UniBw) Werner-Heisenberg-Weg 39, 85577 Neubiberg, Germany

要約

We present an experimental investigation of a turbulent boundary layer flow at a significant adverse pressure gradient at Reynolds number Reθ up to 10000 using large field PIV The testcase is designed to start from a zero pressure gradient flow at Reθ ≈ 8000 with a distinct log-law region following a slowly rising adverse pressure gradient. This allows to reveal a breakdown of the log-law under the effect of the adverse pressure gradient. The region described by the log law is progressively reduced in terms of y+ and then joins into a modified log-law which gives a good fit to the data up to at least y/δ99 ≈ 0.2.

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