Dynamic analysis of finger seal using equivalent model based on distributed mass method

Chen, Guoding; Lu, Fei; Yu, Qing; Su, Hua

doi:10.1177/0954406214525364

Cited by 13 publications

(19 citation statements)

References 14 publications

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“…Ignoring the axial deformation of finger element, the tilting and the axial run-out of rotor, the flow in leakage gap can be simplified as pure pressure flow (Chen G. D. et. al, 2014).…”

Section: Fig 2 Finite Element Model Of Finger Sealmentioning

confidence: 99%

Theoretical and experimental studies on the optimization of finger seal

Zhang

Yin

Zeng

et al. 2020

JAMDSM

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“…Ignoring the axial deformation of finger element, the tilting and the axial run-out of rotor, the flow in leakage gap can be simplified as pure pressure flow (Chen G. D. et. al, 2014).…”

Section: Fig 2 Finite Element Model Of Finger Sealmentioning

confidence: 99%

Theoretical and experimental studies on the optimization of finger seal

Zhang

Yin

Zeng

et al. 2020

JAMDSM

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“…The recursion formulas of friction resistances between aft cover plate and finger element or among adjacent finger elements are formed from equations (15) to (19).…”

Section: Equivalent Parametersmentioning

confidence: 99%

Effect of temperature on the dynamic performance of C/C composite finger seal

Wang

Chen

et al. 2015

Proceedings of the Institution of Mechanical Engineers, Part G:

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The designs of sealing device have prominent influence on the performance of aero-engine. The high temperature environment during the working process of aero-engine also has important influence on the performance of sealing device which is located in the aero-engine. Finger seal has a flexible characteristic and high price performance compared with the other seal devices, thus it gets more attention, and lots of researchers have studied about finger seal's performance recently. But so far the dynamic performance of finger seal considering temperature effect is not yet analyzed and discussed. Based on this, an equivalent dynamic model based on distributed mass considering temperature effect is proposed in the paper. The effects of environment temperature and heat through friction on the equivalent structural stiffness of finger stick and contact pressure between finger stick and rotor are discussed. Moreover, the data exchange between the dynamic and thermal analysis is confirmed based on the movement relationship between the rotor excitation and finger stick response. Therefore, the dynamic performance analysis of finger seal including thermal-structure coupling is obtained based on an equivalent dynamic method. The effect of temperature on the dynamic performance of finger seal using this model is analyzed, and the effect of C/C composite structural parameters on the finger seal performance is investigated considering the temperature effect. The above results show that the temperature effect has important influence on the performance of finger seal, so it is necessary to consider the temperature effect when the performance of finger seal is analyzed. The current work further improves the theoretical system about finger seal equivalent dynamic research, and has higher academic significance and engineering value.

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“…The contact state between finger stick and the rotor is reflected by the deformation of the spring, whose stiffness coefficient is k c . As the contact state is complex, in Chen et al., 15,16 the contact system is transformed into an equivalent system which is composed of rough and rigid surface. Accordingly, the contact stiffness coefficient could be defined as where A f is the contact area between finger stick and rotor; A a is the contact area between rough and rigid surface in transformed system; k s and k R are the stiffnesses of the smooth and rough surfaces in the transformed system, respectively.…”

Section: Equivalent Dynamic Modelmentioning

confidence: 99%

Effect of work status on leakage and contact pressure of C/C composite finger seal

Wang

Chen

et al. 2016

Proceedings of the Institution of Mechanical Engineers, Part C:

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The effect of a seal device on the performance of aeroengines is obvious. As well as the complicated operating state of aeroengines also has important influence on seal device performance. Finger seal is a new seal device, which has been extensively studied recently. However, so far there is little work about finger seal's dynamic performance considering work status. For this reason, finger seal's dynamic performance considering work status is proposed using equivalent dynamic model with distributed mass in this paper. The effects of the precession and nutation incline of rotor on the finger seal's performance are investigated. Meanwhile, density and preparation direction of fiber bundle have influence on its dynamic performance and that is studied under the rotor precession incline. Based on this, it is shown that the effect of rotor precession incline on the finger seal dynamic performance is obvious, thus it is necessary to consider the effect of the factor on finger seal dynamic performance. The present work is conducive to promote dynamic analysis technology of finger seal to engineering application, and also improve the theoretical research system and methodology of finger seal.

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Dynamic analysis of finger seal using equivalent model based on distributed mass method

Cited by 13 publications

References 14 publications

Theoretical and experimental studies on the optimization of finger seal

Theoretical and experimental studies on the optimization of finger seal

Effect of temperature on the dynamic performance of C/C composite finger seal

Effect of work status on leakage and contact pressure of C/C composite finger seal

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