Flow diagnostics downstream of a tribladed rotor model
I.V. Naumov1, V.V. Rahmanov1, V.L. Okulov2, C.M. Velte3, K.E. Meyer3, R.F. Mikkelsen3
1 Kutateladze Institute of Thermophysics SB RAS; Novosibirsk State University
2 Kutateladze Institute of Thermophysics SB RAS; The Technical University of Denmark
3 The Technical University of Denmark
naumov@itp.nsc.ru
Keywords: rotor systems, helical vortices, vortex wake, Stereoscopic Particle Image Velocimetry
Pages: 171-181
Abstract
This paper presents results of a study of vortex wake structures and measurements of instantaneous 3D velocity fields downstream of a triblade turbine model. Two operation modes of flow around the rotor with different tip speed ratios were tested. Initially the wake structures were visualized and subsequently quanti-tative data were recorded through velocity field restoration from particle tracks using a stereo PIV system.
The study supplied flow diagnostics and recovered the instantaneous 3D velocity fields in the longitudinal cross section behind a tribladed rotor at different values of tip speed ratio. This set of data provided a basis for testing and validating assumptions and hypothesis regarding classical theories of rotors.
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