Dynamic Analysis of Rotor-Seal System Considering the Radial Growth Effect of the Seal

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.

Nonlinear Modeling and Vibration Response Analysis of a Dual-Rotor System with an Inter-Shaft Graphite Seal

“…Shet calculated the dynamic response of the rotor system by considering the radial growth effect of the seals at different pressure ratios. His study also emphasized the effect of the seals on the whole rotor system [19]. In order to address the problem of friction caused by the seal between the shafts in the dual rotor structure, Ling [20] carried out a study on the rotor dynamics modeling and dynamics characteristics considering the friction of the seal between the shafts.…”

Influence of Methane-Hydrogen Mixture Characteristics on Compressor Vibrations

“…The input parameters of such a model are rotor dynamic coefficients-stiffness and damping coefficients. To determine them, theoretical, experimental and numerical studies are carried out [13][14][15][16][17]. A nonlinear model of gas-dynamic forces is described in [18].…”