Dynamic Analysis of Rotor-Seal System Considering the Radial Growth Effect of the Seal
Vivek V. Shet,A. S. Sekhar,Biren Prasad +2 more
- Vol. 1510, Iss: 1, pp 012002
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TLDR
In this paper, the dynamic response of the rotor system has been calculated considering the seal growth effect at each operating speed, and the results show that the system is influenced by radial growth of seal at lower pressure ratio and higher rotational speed.Abstract:
Effect of the increase in operating speed, temperature and pressure ratio on turbomachine components must be studied and understood seriously. One of the major challenges is to choose a right initial clearance for seals considering the seal growth as it may affect rotor system dynamic characteristics and leakage performance. In the present study the dynamic response of the rotor system has been calculated considering the seal growth effect at each operating speed. It is been analyzed by the response plots and the orbital plots. The results show that the dynamic response of the system is influenced by radial growth of seal at lower pressure ratio and higher rotational speed. At higher pressure ratio the radial growth of seal has insignificant effect on rotor stability. In addition to these, the present study also emphasizes on the effect of the seal on the overall rotor system by comparing two different rotor-seal system.read more
References
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Journal ArticleDOI
Effect of the Seal Force on Nonlinear Dynamics and Stability of the Rotor-bearing-seal System:
Xiaoyao Shen,Mei Zhao +1 more
TL;DR: In this article, the effect of the seal force on nonlinear dynamics and stability of the rotor-bearing-seal system was investigated both theoretically and experimentally, and an experimental rotor-beating seal device was proposed.
Journal ArticleDOI
Numerical techniques for computing nonlinear dynamic characteristic of rotor-seal system
TL;DR: In this paper, a transient CFD procedure to compute the nonlinear dynamic characteristic of the coupled rotor-seal system was presented, where the displacement diffusion model was implemented to govern the mesh deformation, and the URANS (Unsteady Reynolds averaged Navier-Stokes) equations were solved to obtain the transient fluid force on the rotor surface for the free vibrations.
Journal ArticleDOI
Labyrinth Seal Rotordynamic Characteristics Part I: Operational Conditions Effects
Zhigang Li,Jun Li,Zhenping Feng +2 more
TL;DR: Feng et al. as discussed by the authors used a transient computational-fluid-dynamics method based on the multifrequency elliptical whirling orbit model to predict transient leakage flow rates and frequency-dependent rotordynamic coefficients for a labyrinth gas seal.
Journal ArticleDOI
On the choice of initial clearance and prediction of leakage flow rate for a rotating gas turbine seal
TL;DR: In this paper, the authors propose a design procedure along with guidelines for the choice of initial clearance of a typical rotating gas turbine seal in a secondary air system, which is based on the design procedure proposed in this paper.
Journal ArticleDOI
Effect of Radial Growth on Rotordynamic Characteristics of Labyrinth Seal-Rotor System
TL;DR: The turbomachinery of modern turbomachines have a compact geometry structure, superior thermodynamic efficiency, and high power density as discussed by the authors, which is the main characteristics of turbomachiners.