The present paper covers fluid flow in rotor-stator cavities with inward through-flow. First, a general introduction into the physics of the cavity boundary layer flow is given. The structure of the flow is very complex and depends on different dimensionless parameters. For practical applications, simple and robust calculation procedures are crucial for design purposes. Two basic modelling approaches are compared (3 layer model of Kurokawa [14] and “one layer” approach of Mo¨hring [17]) with experimental data from the literature. The flow models are classified in context of the simplified equations of motion by emphasizing the main assumptions and simplifications in their derivation. Further on, for the one layer model, the use of the logarithmic law for the velocity distribution close to the wall is proposed instead of the classic 1/7 power law. The modified flow model is validated against experimental data for different parameter combinations, yielding better agreement for moderate inlet rotation. Finally numerical simulations have been performed in order to investigate the discrepancies between measured and calculated core rotation distributions for strong inlet swirl. It is supposed that the assumption of radial equilibrium in the core region is not necessarily appropriate for evaluation of the core rotation. Further on, it is clarified in which situations the tangential velocity component of the absolute velocity at the impeller outlet can be used as a boundary condition for the flow model.
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ASME 2009 Fluids Engineering Division Summer Meeting
August 2–6, 2009
Vail, Colorado, USA
Conference Sponsors:
- Fluids Engineering Division
ISBN:
978-0-7918-4373-4
PROCEEDINGS PAPER
Investigation of the Fluid Flow in a Rotor-Stator Cavity With Inward Through-Flow
Bjo¨rn-Christian Will,
Bjo¨rn-Christian Will
University of Duisburg-Essen, Duisburg, Nordrhein-Westfalen, Germany
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Friedrich-Karl Benra
Friedrich-Karl Benra
University of Duisburg-Essen, Duisburg, Nordrhein-Westfalen, Germany
Search for other works by this author on:
Bjo¨rn-Christian Will
University of Duisburg-Essen, Duisburg, Nordrhein-Westfalen, Germany
Friedrich-Karl Benra
University of Duisburg-Essen, Duisburg, Nordrhein-Westfalen, Germany
Paper No:
FEDSM2009-78503, pp. 207-218; 12 pages
Published Online:
July 26, 2010
Citation
Will, B, & Benra, F. "Investigation of the Fluid Flow in a Rotor-Stator Cavity With Inward Through-Flow." Proceedings of the ASME 2009 Fluids Engineering Division Summer Meeting. Volume 2: Fora. Vail, Colorado, USA. August 2–6, 2009. pp. 207-218. ASME. https://doi.org/10.1115/FEDSM2009-78503
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