W.E. Carscallen
Measurement and Computation of Energy Separation in the Vortical Wake Flow of a Turbine Nozzle Cascade
Carscallen, W.E.; Currie, T.C.; Hogg, S.I.; Gostelow, J.P.
Abstract
This paper describes the observation, measurement, and computation of vortex shedding behind a cascade of turbine nozzle guide vanes that have a blunt trailing edge. At subsonic discharge speeds, periodic wake vortex shedding was observed at all times at a shedding frequency in the range 7–11 kHz. At high subsonic speeds the wake was susceptible to strong energy redistribution. The effect was greatest around an exit Mach number of 0.95 and results are presented for that condition. An unusually cold flow on the wake centerline and hot spots at the edges of the wake were measured. These were found to be a manifestation of Eckert–Weise effect energy separation in the shed vortex street. Experimental identification of these phenomena was achieved using a new stagnation temperature probe of bandwidth approaching 100 kHz. Using phase-averaging techniques, it was possible to plot contours of time-resolved entropy increase at the downstream traverse plane. Computational work has been undertaken that gives qualitative confirmation of the experimental results and provides a more detailed explanation of the fine scale structure of the vortex wake. The topology of the wake vortical structures behind blunt trailing-edged turbine blades is becoming clearer. These measurements are the first instantaneous observations of the energy separation process occurring in turbine blade wake flows. This was also the first demonstration of the use of the probe in the frequency, Mach number, and temperature ranges typical of operation behind the rotors of high-performance turbomachines such as transonic fans.
Citation
Carscallen, W., Currie, T., Hogg, S., & Gostelow, J. (1999). Measurement and Computation of Energy Separation in the Vortical Wake Flow of a Turbine Nozzle Cascade. Journal of Turbomachinery, 121(4), 703-708. https://doi.org/10.1115/1.2836723
Journal Article Type | Article |
---|---|
Publication Date | 1999-10 |
Deposit Date | Aug 10, 2010 |
Journal | Journal of Turbomachinery |
Print ISSN | 0889-504X |
Electronic ISSN | 1528-8900 |
Publisher | American Society of Mechanical Engineers |
Peer Reviewed | Peer Reviewed |
Volume | 121 |
Issue | 4 |
Pages | 703-708 |
DOI | https://doi.org/10.1115/1.2836723 |
You might also like
Geothermal Potential of the Global Oil Industry
(2018)
Book Chapter
Downloadable Citations
About Durham Research Online (DRO)
Administrator e-mail: dro.admin@durham.ac.uk
This application uses the following open-source libraries:
SheetJS Community Edition
Apache License Version 2.0 (http://www.apache.org/licenses/)
PDF.js
Apache License Version 2.0 (http://www.apache.org/licenses/)
Font Awesome
SIL OFL 1.1 (http://scripts.sil.org/OFL)
MIT License (http://opensource.org/licenses/mit-license.html)
CC BY 3.0 ( http://creativecommons.org/licenses/by/3.0/)
Powered by Worktribe © 2024
Advanced Search