Research on the operation mechanism and performance of bump-type compliant foil face gas seal

Chen, Yuan; Chen, Kai; Peng, Xudong; Wang, Bingqing; Li, Xiaolu; Jin, Jie

doi:10.1007/s40430-022-03606-8

Cited by 6 publications

(2 citation statements)

References 24 publications

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“…Bai [14] and Zhao [15] also analyzed the mechanical properties of compliant foil cylindrical gas seal. Based on the gas-elastic coupling analysis method, Chen et al [16,17] carried out sealing performance evaluation and structural optimization of CFFGS. Wang et al [18] applied the small perturbation method for dynamic performance prediction and dynamical structure optimization of CF-FGS.…”

Section: Introductionmentioning

confidence: 99%

Study on Sealing Characteristics of Compliant Foil Face Gas Seal under Typical Hypervelocity Gas Effects

Chen

Wang

et al. 2023

Lubricants

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In order to investigate the influence of typical hypervelocity gas effects on the gas lubrication performance of compliant foil face gas seal (CFFGS) end surfaces, the gas–elastic coupling lubrication theory model of CFFGS is modified by considering the choked flow and inertia effect, and the lubrication performance is solved using the finite difference method. Based on the choking effect, the effect of hypervelocity choked flow on the pressure field and velocity field of the seal is analyzed, and the influence of operating parameters on the choked flow and the mechanism of choked flow on the change in dynamic lubrication and sealing performance are explored. Furthermore, based on the inertia effect, the effect of gas inertia force on the flow field, and the correlation law between the pressure field and velocity field under the influence of operating parameters are studied. Then, the relationship between the inertia effect and sealing performance are analyzed. The results show that choked flow increases sealing outlet pressure significantly, from 0.1 MPa to a maximum of 14.25 MPa, and the sealing outlet flow velocity decreases by up to 50 times. The increase in medium pressure and balance film thickness aggravate the choking effect, resulting in a 20% maximum increase in opening force and a 99.6% maximum decrease in leakage rate. In addition, the inertia effect causes obvious centrifugal movement of the gas flow. As result, the radial flow velocity reduces by up to 50%, and the pressure distribution varies widely. Especially under high rotational speed and high medium pressure, the inertia effect is enhanced to clearly reduce the opening force (max. decrement of 3.5%) and leakage rate (max. decrement of 23%).

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Section: Introductionmentioning

confidence: 99%

Study on Sealing Characteristics of Compliant Foil Face Gas Seal under Typical Hypervelocity Gas Effects

Chen

Wang

et al. 2023

Lubricants

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“…Later, Heshmat [11,12] tested it on an aircraft air circulator and hydrogen centrifugal compressor, which also demonstrated that CFFGS has excellent performance of high stability and low leakage. At present, most of the publicly reported research results of CFFGS are engineering test research and steady-state theory research [13][14][15] , dynamic theoretical research is relatively lacking. Therefore, based on the existing structure and research results of CFFGS, this paper takes FSD-CFFGS, which is more adaptive, as the object to establish a dynamic model and further study the dynamic performance.…”

Section: Introductionsmentioning

confidence: 99%

Dynamic performance analysis and parameter collaborative optimization of floating seal dam compliant foil face gas seal

Chen,

Xiong,

et al. 2023

J Braz. Soc. Mech. Sci. Eng.

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：Under the consideration of axial displacement excitation, the floating seal dam compliant foil face gas seal (FSD-CFFGS) is taken as the research object. based on the theory of gas lubrication and elastic mechanics, the seal dynamics equation, transient Reynolds equation and foil deformation equation are solved by coupling method. The dynamic performance difference between FSD-CFFGS and rigid surface face gas seal (RSFGS) is compared and analyzed, Besides, parameter optimization is carried out to improve dynamic stability and leakage control performance. The results show that the dynamic performance of the FSD-CFFGS is significantly improved compared with the RSFGS. The dynamic performance of FSD-CFFGS can be effectively improved by reasonably configuring the structural or mechanical parameters such as the supporting foil compliance coefficient, spring stiffness, auxiliary seal ring damping, and the flexibly mounted stator's mass.

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Design and performance optimization of texture arrangement scheme for foil face gas seal with super-elliptical hole texture

Chen,

Zhang,

et al. 2024

J Braz. Soc. Mech. Sci. Eng.

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Research on the operation mechanism and performance of bump-type compliant foil face gas seal

Cited by 6 publications

References 24 publications

Study on Sealing Characteristics of Compliant Foil Face Gas Seal under Typical Hypervelocity Gas Effects

Study on Sealing Characteristics of Compliant Foil Face Gas Seal under Typical Hypervelocity Gas Effects

Dynamic performance analysis and parameter collaborative optimization of floating seal dam compliant foil face gas seal

Design and performance optimization of texture arrangement scheme for foil face gas seal with super-elliptical hole texture

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