For most technical applications, simulations of the Reynolds-Averaged-Navier-Stokes equations has become a standard analysis tool, since it brings a good compromise between computational accuracy and costs. However, turbulence models have to be implemented to close the system of differential equations. To study the effects of turbulent boundary conditions on the prediction of the secondary flow field in a linear compressor cascade with tip clearance, the state of the art RANS solver TRACE in conjunction with Wilcox’ k-ω-turbulence model is used. Besides a stagnation point anomaly prevention, no turbomachinery specific modifications of the turbulence model are applied. Transition is not considered. The current investigations focus on the influence of the imposed turbulent inlet quantities (k0, ω0) on the development of the wall-bounded flow in the cascade. The turbulent kinetic energy k is basically described as a function of the turbulence intensity level measured in an equivalent experimental setup. For the reconstruction of turbulent fluctuations beyond measuring accessibility in the vicinity of the wall, an analytical approach is proposed and validated with DNS data of turbulent flat plate and fully developed channel flows. To identify the influence of different dissipation rates ω on the characteristics of the secondary flow, the free stream turbulent length scale LtFS is varied in four steps ranging from 0.2 up to 5 millimeters. Additionally, the effects of different span-wise length scale distributions across the inlet flow boundary layer are considered.
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ASME Turbo Expo 2016: Turbomachinery Technical Conference and Exposition
June 13–17, 2016
Seoul, South Korea
Conference Sponsors:
- International Gas Turbine Institute
ISBN:
978-0-7918-4969-9
PROCEEDINGS PAPER
Effects of Turbulent Boundary Conditions on the Prediction of the Secondary Flow Field in a Linear Compressor Cascade
Peter Busse,
Peter Busse
Technische Universität Dresden, Dresden, Germany
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Andreas Krug,
Andreas Krug
Technische Universität Dresden, Dresden, Germany
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Martin Lange,
Martin Lange
Technische Universität Dresden, Dresden, Germany
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Konrad Vogeler,
Konrad Vogeler
Technische Universität Dresden, Dresden, Germany
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Ronald Mailach
Ronald Mailach
Technische Universität Dresden, Dresden, Germany
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Peter Busse
Technische Universität Dresden, Dresden, Germany
Andreas Krug
Technische Universität Dresden, Dresden, Germany
Martin Lange
Technische Universität Dresden, Dresden, Germany
Konrad Vogeler
Technische Universität Dresden, Dresden, Germany
Ronald Mailach
Technische Universität Dresden, Dresden, Germany
Paper No:
GT2016-56455, V02AT37A011; 14 pages
Published Online:
September 20, 2016
Citation
Busse, P, Krug, A, Lange, M, Vogeler, K, & Mailach, R. "Effects of Turbulent Boundary Conditions on the Prediction of the Secondary Flow Field in a Linear Compressor Cascade." Proceedings of the ASME Turbo Expo 2016: Turbomachinery Technical Conference and Exposition. Volume 2A: Turbomachinery. Seoul, South Korea. June 13–17, 2016. V02AT37A011. ASME. https://doi.org/10.1115/GT2016-56455
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