Sage Journals: Discover world-class research

Abstract

The topic of this paper is focused on the models of steam force and torque of a rotor subjected to the leakage of tip clearance. The unsteady three-dimensional Navier-Stokes solver is used to simulate the flow field for a rotating blade row with a tip clearance. The basic algorithm time marches the fully three-dimensional unsteady equations of motion expressed in a finite volume form. The Baldwin-Lomax model is used as turbulence model. By simulating the complex flow field including oscillating tip clearance with rotor vibration, the instantaneous asymmetry and oscillatory pressures acting on the surfaces of the blade row can be acquired, and the instantaneous steam force and torque acting on the rotor can be calculated. A new nonlinear model of steam force is created in this paper, and a model of steam torque excited by leakage is also reported.

Keywords

turbomachinery steam force tip clearance

Get full access to this article

View all access options for this article.

References

Alford

J. S.

Protecting turbomachinery from self-excited rotor whirl. J. Engng. Power Trans. ASME, 1965, 87, 333–344.

Pollman

Schwerdtfeger

Termuehlen

Flow excited vibrations in high-pressure turbines (steam whirl). J. Engng. Power Trans. ASME, 1978, 100, 219–228.

Wang

J. H.

Shih

F. M.

Threshold performance optimization of a rotor-bearing system subjected to leakage excitation. J. Engng. Gas Turbines Power Trans. ASME, 1990, 112, 439–444.

Dawes

W. N.

A numerical analysis of the three-dimensional viscous flow in a transonic compressor rotor and comparison with experiment. J. Turbomachinery, 1987, 109 (1), 83–90.

Moore

Ransmayr

Flow in a turbine cascade Part I—Losses and leading edge effect. J. Engng. Gas Turbines Power, Trans. ASME, 1984, 106 (2), 400–408.

Liu

J.-S.

Bozzola

Three-dimensional Navier-Stokes analysis of tip clearance flow in linear turbine cascades. AIAA Journal, 1993, 31 11, 2068–2074.

Kang

Hirsch

Experimental study on the three-dimensional flow within a compressor cascade with tip clearance: Part II—The tip leakage vortex. J. Turbomachinery Trans. ASME, 1993, 115 3, 444–452.

Kang

Hirsch

Experimental study on the three-dimensional flow within a compressor cascade with tip clearance: Part I—Velocity and pressure fields. J. Turbomachinery Trans. ASME, 1993, 115 3, 435–443.

Stauter

R. C.

Measurement of the three-dimensionaltip region flow field in an axial compressor. J. Turbomachinery Trans. ASME, 1993, 115 3, 468–476.

10.

Puterbaugh

S. L.

Copenhaver

W. W.

Flow field unsteadiness in the tip region of a transonic compressor rotor. J. Fluids Engng. Trans. ASME, 1997, 119 2, 122–128.

11.

Jian-jun

Numerical simulation of steady and unsteady viscous flows in cascades. J. Engng. Thermophysics, 2001, 22 3, 301–303.

12.

Huang

Ling

A numerical simulation of tip clearance flow in rotor and the excited vibration of blade. Comp. Fluid Dyn. J., 2001, 10 2, 242–246.

13.

Ishida

Nonlinear vibration and chaos in rotordynamics. JSME Int. J. Ser. C, 1994, 37 2, 237–245.

14.

Granville

P. S.

Baldwin-Lomax factor for turbulent boundary layers in pressure gradients. AIAA Journal, 1987, 25 12, 1624–1627.

Models of steam force and torque of a rotor subjected to the leakage of tip clearance

Abstract

Abstract

Keywords

Get full access to this article

References