Near-Wall Flow in Turbomachinery Cascades—Results of a German Collaborative Project

International Journal of Turbomachinery, Propulsion and Power

Jordi Ventosa-Molina¹  Jochen Fröhlich¹  Francesca di Mare²  Martin Sinkwitz²  David Engelmann²  Ronald Mailach³  Björn Koppe³  Reinhard Niehuis⁴  Tobias Schubert⁴ 

[1] Chair of Fluid Mechanics, Institute of Fluid Mechanics, Technische Universität Dresden, 01062 Dresden, Germany;Chair of Thermal Turbomachines and Aeroengines, Department of Mechanical Engineering, Ruhr University Bochum, Universitätsstr. 150, 44801 Bochum, Germany;Chair of Turbomachinery and Flight Propulsion, Institute of Fluid Mechanics, Technische Universität Dresden, 01062 Dresden, Germany;Institute of Jet Propulsion, Bundeswehr University Munich, Werner-Heisenberg-Weg 39, 85577 Neubiberg, Germany;

关键词: near-wall flow;    boundary layer;    wake interaction;    compressor;    turbine;    cascade;   

DOI  :  10.3390/ijtpp6020009

来源: DOAJ

【 摘 要 】

This article provides a summarizing account of the results obtained in the current collaborative work of four research institutes concerning near-wall flow in turbomachinery. Specific questions regarding the influences of boundary layer development on blades and endwalls as well as loss mechanisms due to secondary flow are investigated. These address skewness, periodical distortion, wake interaction and heat transfer, among others. Several test rigs with modifiable configurations are used for the experimental investigations including an axial low speed compressor, an axial high-speed wind tunnel, and an axial low-speed turbine. Approved stationary and time resolving measurements techniques are applied in combination with custom hot-film sensor-arrays. The experiments are complemented by URANS simulations, and one group focusses on turbulence-resolving simulations to elucidate the specific impact of rotation. Juxtaposing and interlacing their results the four groups provide a broad picture of the underlying phenomena, ranging from compressors to turbines, from isothermal to non-adiabatic, and from incompressible to compressible flows.

【 授权许可】

Unknown