Influence of turbulent cavitating flow on performance characteristics of spiral groove liquid film seal

Spiral groove liquid film seal is expected to be the prime candidate for application to high-speed liquid-oxygen turbopumps, and the lubricant flow between the sealing faces is turbulent due to the liquid-oxygen properties and the working conditions. Based on the Ng–Pan model and mass-conserving alg...

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Bibliographic Details
Published in:Proceedings of the Institution of Mechanical Engineers. Part J, Journal of engineering tribology Journal of engineering tribology, 2022-01, Vol.236 (1), p.70-79
Main Authors: Wang, Yunlei, Wu, Jiu Hui, Xu, Lushuai
Format: Article
Language:English
Subjects:
Algorithms
Cavitation
Film thickness
Finite difference method
Fluid dynamics
Grooves
Mechanical engineering
Reynolds equation
Stiffness
Turbine pumps
Turbulent flow
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Summary:Spiral groove liquid film seal is expected to be the prime candidate for application to high-speed liquid-oxygen turbopumps, and the lubricant flow between the sealing faces is turbulent due to the liquid-oxygen properties and the working conditions. Based on the Ng–Pan model and mass-conserving algorithm, the modified dynamic Reynolds equation considering flow regime and cavitation is obtained, which is solved by the finite-difference method. The effects of flow regime and cavitation on the performance of spiral groove liquid film seal are analyzed. The results indicate that the balanced film thickness and opening force increase due to the turbulent flow. The cavitation ratio increases in the laminar–turbulent transition region, which reduces the opening force and liquid film stiffness.
ISSN:1350-6501
2041-305X
DOI:10.1177/13506501211010036