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Implementation of a Method to Determine Aerodynamic Propeller-Wing Interaction Read chapter Read first chapter

2020 | OriginalPaper | Chapter

Experimental Investigation of the Delay of Gap- and Step-Induced Transition by Means of Suction

Authors : Benjamin Dimond, Marco Costantini, Steffen Risius, Christian Klein, Martin Rein

Published in: New Results in Numerical and Experimental Fluid Mechanics XII

Publisher: Springer International Publishing

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Abstract

The influence of suction on gap- and step-induced boundary-layer transition was investigated experimentally and systematically for large chord Reynolds numbers (up to \(16 \times 10^{6}\)) and various pressure gradients at Mach number 0.6. The experiments were conducted in the low-turbulence Cryogenic Ludwieg-Tube Göttingen with a two-dimensional wind-tunnel model. Transition is detected non-intrusively by means of temperature-sensitive paint. Forward-facing steps and spanwise gaps have caused transition to occur at a more upstream location as compared to a smooth configuration at the same test conditions. Applying suction through the gap, however, was shown to significantly delay transition and even overcompensate the adverse effect of steps and gaps. Further increasing suction rate shifts transition even more downstream until a certain value of suction is reached, above which there is effectively no change in transition location even for larger suction rates.

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previous chapter Surface Temperature Effects on Boundary-Layer Transition at Various Subsonic Mach Numbers and Streamwise Pressure Gradients
next chapter Boundary Layer Suction Modeling Based on the DLR TAU-Code Effusion Mass Flux Boundary Condition
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Metadata
Title
Experimental Investigation of the Delay of Gap- and Step-Induced Transition by Means of Suction
Authors
Benjamin Dimond
Marco Costantini
Steffen Risius
Christian Klein
Martin Rein
Copyright Year
2020
Book
New Results in Numerical and Experimental Fluid Mechanics XII

Print ISBN: 978-3-030-25252-6

Electronic ISBN: 978-3-030-25253-3

Copyright Year: 2020

DOI
https://doi.org/10.1007/978-3-030-25253-3_16

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