Fluid flow in a narrow gap is a characteristic problem in fluid mechanics. In today’s turbomachines several applications are based on the phenomena of two surfaces being separated by a thin fluid film of only a few micrometers. In this contribution a numerical model is introduced to determine flow characteristics of compressible fluids, contained between two concentric non contacting rotating rings. The model is based on the assumption of a laminar viscous flow field and isothermal conditions. Furthermore it takes aerostatic and aerodynamic effect into account. A finite difference approach to solve the models governing equation is described and methods to improve convergence are introduced. To perform the established numerical model on a wide variety of geometric configurations an interface between a 3D-CAD design software and the numerical model has been developed and is presented in this paper.
- Fluids Engineering Division
Numerical Analysis of Compressible Fluid Flow in Narrow Gaps
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Kefalas, A, Benra, F, & Dohmen, HJ. "Numerical Analysis of Compressible Fluid Flow in Narrow Gaps." Proceedings of the ASME 2014 4th Joint US-European Fluids Engineering Division Summer Meeting collocated with the ASME 2014 12th International Conference on Nanochannels, Microchannels, and Minichannels. Volume 1B, Symposia: Fluid Machinery; Fluid-Structure Interaction and Flow-Induced Noise in Industrial Applications; Flow Applications in Aerospace; Flow Manipulation and Active Control: Theory, Experiments and Implementation; Multiscale Methods for Multiphase Flow; Noninvasive Measurements in Single and Multiphase Flows. Chicago, Illinois, USA. August 3–7, 2014. V01BT10A044. ASME. https://doi.org/10.1115/FEDSM2014-22002
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