Fluid Flow Equations for Rotordynamic Flows in Seals and Leakage Paths
نویسندگان
چکیده
منابع مشابه
Fluid Flow Equations For Rotordynamic Flows In Seals And Leakage Paths
Fluid-induced rotordynamic forces produced by the uid in an annular seal or in the leakage passage surrounding the shroud of a pump or turbine, are known to contribute substantially to the potential excitation forces acting on the rotor. In this paper we explore some of the important features of the equations governing bulkow models of these ows. This in turn suggests methods which might be use...
متن کاملModel Predictions and Experimental Results for the Rotordynamic Characteristics of Leakage Flows in Centrifugal Pumps
Adiei GlIinzburg is a Research Scientisl at the l nsfifll l de Machines Hydrau /iques et de Mecaniqlle des Fluides at the EcoLe Polytechn ique Federate de Lausallne, Switzerland. She IIo/eisa B.Sc. degree in AeronaMical Engineeringfrom the University a/the Witwatersrand and M.S. and Ph.D. degrees from the CaLifornia Institute a/ Technology. Christopher E. Brennen is a Professor of Mechanical En...
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The interaction of work fluid mechanics with that of the rotary system itself, basically composed of axes, bearings and rotors, is performed by inserting equivalent dynamic coefficients in the mathematical model of the rotor, the latter being obtained by the finite element method. In this paper, the dynamic coefficients of inertia, stiffness and damping of the flat seals analyzed here are evalu...
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The rotordynamic forces generated by the fluid flow through the impeller leakage path of a centrifugal pump are now well established. The present paper examines the effects of modifying the leakage path geometry by changing the front shroud, from a conical shape to a more typical curved design, and the effects of low pressure seal design on these forces. It is found that only the cross-coupled ...
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Finite-scale equations (FSE) describe the evolution of finite volumes of fluid over time. We discuss the FSE for a one-dimensional compressible fluid, whose every point is governed by the Navier-Stokes equations. The FSE contain new momentum and internal energy transport terms. These are similar to terms added in numerical simulation for high-speed flows (e.g. artificial viscosity) and for turb...
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ژورنال
عنوان ژورنال: Journal of Fluids Engineering
سال: 2001
ISSN: 0098-2202,1528-901X
DOI: 10.1115/1.1436093