Mulleners, Karen; Gilge, Philipp; Hohenstein, S.: Impact of surface roughness on the turbulent wake flow of a turbine blade. In: Journal of Aerodynamics 2014 (2014), 458757. DOI: https://doi.org/10.1155/2014/458757
Abstract: | |
Roughened aeroengine blade surfaces lead to increased friction losses and reduced efficiency of the individual blades. The surface roughness also affects the wake flow of the blade and thus the inflow conditions for the subsequent compressor or turbine stage. To investigate the impact of surface roughness on a turbulent blade wake, we conducted velocity field measurements by means of stereo particle image velocimetry in the wake of a roughened turbine blade in a linear cascade wind tunnel. The turbine blade was roughened at different chordwise locations. The influence of the chordwise location of the added surface roughness was examined by comparing their impact on the width and depth of the wake and, the positions and distribution of vortical structures in the wake. Additionally, the friction loss coefficients for different surface roughness positions were estimated directly from the velocity field. | |
License of this version: | CC BY 3.0 Unported |
Document Type: | Article |
Publishing status: | publishedVersion |
Issue Date: | 2014 |
Appears in Collections: | Fakultät für Maschinenbau |
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