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刘应征

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期刊论文

Computation of rotordynamic coefficients associated with leakage steam flow through labyrinth seal

刘应征W. Z. Wang · Y. Z. Liu · H. P. Chen · P. N. Jiang

Arch Appl Mech (2007)77: 587-597,-0001,():

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摘要/描述

A mathematical model of calculating rotordynamic coefficients associated with leakage steam flow through labyrinth seals was presented. Particular attention was given to incorporating thermal properties of the steam fluid into prediction of leakage flow and subsequent derivation of rotordynamic coefficients, which quantitatively characterize influence of aerodynamic forcing of the leakage steam flow on the rotordynamics. By using perturbation analysis, we determined periodic and analytic solutions of the continuity and circumferential momentum equations for the time-dependent flow induced by non-axisymmetric rotation of the rotor encompassed by a labyrinth seal. Pressure distributions along labyrinth seal cavities and rotordynamic coefficients were compared at the same condition for air and steam flows. Influence of steam flow through the labyrinth seal cavities on rotordynamic coefficients was analyzed in terms of inlet pressure, inlet swirl velocity and rotor speed

版权说明:以下全部内容由刘应征上传于   2011年05月13日 11时15分09秒,版权归本人所有。

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