NAFEMS International Journal of CFD Case Studies

Volume 2, February 2000

ISSN 1462-236X

The Computation of Axi-Symmetric Rotor-Stator Flows Related to Cooling Passages of Electrical Generators

H. Iacovides, M A Leschziner and H-Y Li
Department of Mechanical Engineering, UMIST, Manchester M60 1QD, UK

https://doi.org/10.59972/j3ghjjyg

Keywords: Computation, CFD, Axi-Symmetric Rotor-Stator Flows, Cooling Passages, Electrical Generators and Turbulence

Purpose and Plan of Analysis

The objectives of this exploratory study have been, first, to investigate the effectiveness of variants of the high-Re k-ε model in the present rotating flow - a practice widely used in industrial computations - and second, to examine the influence of swirl, multiple injection and exit, through a series of steady-state, two-dimensional-flow computations. The rationale of the 2-D simplification is rooted in the assumption that the present type of swirl, provoked by the rotating inner cylinder, will destabilise turbulence and will therefore tend to reduce circumferential variations. Consequently, the assumption of an axi-symetric, i.e. two-dimensional flow, is not expected to cause serious differences between the computed and the actual flow behaviour...

References

[1] MOSS W.D. and BAKER S. - Recirculating flows associated with two-dimensional steps, J. Aero Quarterly, pp 151-172, August 1980.

[2] HORSEMAN G., Private communication, 1994.

[3] LEONARD B. P. - A stable and accurate convective modelling procedure based on quadratic interpolation, Comput. Meth. Appl. Mech. Engrg., 19, pp 59-98, 1979

[4] KATO M. and LAUNDER B.E. - The modelling of turbulent flow around stationary and vibrating square cylinders, Proc of Symp. on Turbulent Shear Flows, Kyoto, 1993.

[5] BRADSHAW P. - The analogy between streamline curvature and buoyancy in turbulent shear flow, J. Fluid Mechanics, 36, p 117, 1969

Cite this paper

H. Iacovides, M A Leschziner, H-Y Li, The Computation of Axi-Symmetric Rotor-Stator Flows Related to Cooling Passages of Electrical Generators, NAFEMS International Journal of CFD Case Studies, Volume 2, 2000, Pages 3-17, https://doi.org/10.59972/j3ghjjyg