Abstract
In order to improve the opening and stability of the Compliant Foil Face Gas Seal (CFFGS) under high-speed conditions, this paper proposes a new CFFGS structure with super-elliptical hole textures on the foil end face. It also establishes its theoretical model of aeroelastic coupling lubrication and solves the above model using the finite difference method, and an original binary representation method for the position of the hole texture arrangement scheme is proposed. Systematically investigated, the influence law of the hole texture arrangement scheme on the steady-state performance of the seal is identified, and its mechanism of influence is made clear. The optimized design of the structural parameters of the texture structure and the foil end face is further carried out under the optimal arrangement scheme of the hole texture with the maximum opening force and gas film stiffness as the target. The outcomes demonstrate that when the texture is set in the seal and face’s slope section, the seal’s opening and stability are obviously improved. Furthermore, within the scope of parameter research, when the super-elliptical coefficients n1 and n2 are 4, the transverse semi-axis a of super-elliptical texture is 2.5 mm, the longitudinal semi-axis b of super-elliptical texture is 4 mm, the wedge height δh is 14–20 μm, and the compliance coefficient α is 0.02–0.03, the CFFGS with super-elliptical hole texture has better all-around sealing performance.
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The authors gratefully acknowledge the financial supports of the Key Program of the Natural Science Foundation of Zhejiang Province (LZ23E050002), the National Natural Science Foundation of China (51905513 and 52005470), and the Natural Science Foundation of Zhejiang Province (LQ21E050020).
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Chen, Y., Zhang, J., Li, Y. et al. Design and performance optimization of texture arrangement scheme for foil face gas seal with super-elliptical hole texture. J Braz. Soc. Mech. Sci. Eng. 46, 362 (2024). https://doi.org/10.1007/s40430-024-04955-2
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DOI: https://doi.org/10.1007/s40430-024-04955-2