학술논문
A M ethod to D etermine the C ircumferential S liding of the I ntershaft G as F ilm S eal C onsidering C entrifugal and T hermal E xpansion E ffects Guoqiang Hou
Document Type
Article
Author
Source
International Journal of Fluid Machinery and Systems, 16(3), 60, pp.282-295 Sep, 2023
Subject
Language
English
ISSN
1882-9554
Abstract
The paper presents a method for predicting the circumferential relative sliding between the seal ring and the outer rotor in the dual rotor aero engine in tershaft seal under high temperature and high speed conditions A criterion is proposed for determining the circumferential sliding of the intershaft end face gas film seal taking into account the effects of centrifugal expansion and thermal expansion. Th e mechanical mechanism of the circumferential sliding between the seal ring and the outer rotor is investigated. The expansion of the seal ring and the outer rotor is simplified to a plane thermo elastic mechanical problem, and the expansion and deformatio n of the two parts are calculated. The influence of material characteristics, temperature difference, and initial interference on the expansion deformation and connection relationship of the seal ring and outer rotor is analyzed Moreover, the critical sli ding speed region between the seal ring and the outer rotor is determined . The analysis method provides theoretical guidance for predicting the circumferential sliding of the seal ring in practical engineering applications