Rotor-fluid interactions can cause self-excited shaft vibrations of high density turbomachinery. Often the amplitude of the vibrations reaches unacceptably high amplitudes and the scheduled power or running speed cannot be achieved. One of the most important sources of excitation is the flow through labyrinth seals. For a reliable design it is necessary to predict these forces exactly, including not only stiffness but also damping coefficients. As the forces in labyrinth gas seals are rather small only minimal experimental data is available for the comparison and validation of calculations. Meanwhile a new and easy-to-handle identification procedure enables the investigation of numerous seal geometrys. The paper presents dynamic coefficients obtained with a stepped labyrinth and the comparison with other seal concepts. [S0742-4795(00)00903-0]
Dynamic Coefficients of Stepped Labyrinth Gas Seals
Contributed by the International Gas Turbine Institute (IGTI) of THE AMERICAN SOCIETY OF MECHANICAL ENGINEERS for publication in the ASME JOURNAL OF ENGINEERING FOR GAS TURBINES AND POWER. Paper presented at the International Gas Turbine and Aeroengine Congress and Exhibition, Indianapolis, IN, June 7–10, 1999; ASME Paper 99-GT-20. Manuscript received by IGTI March 9, 1999; final revision received by the ASME Headquarters May 15, 2000. Associate Technical Editor: D. Wisler.
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Kwanka , K. (May 15, 2000). "Dynamic Coefficients of Stepped Labyrinth Gas Seals ." ASME. J. Eng. Gas Turbines Power. July 2000; 122(3): 473–477. https://doi.org/10.1115/1.1287033
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