Abstract
The metallic seal has been widely used in many industries, and its seal performance is the guarantee of effective and safe applications. Therefore, it needs to clarify the efforts of sealing surface morphology and leak flow on seals. Aiming at the surface of annular morphology, this paper proposes a theoretical gas leakage evaluation of metallic sealing surfaces. The anisotropic rough surfaces were used to carry out the contact analysis. From the contact model, the leak channels were extracted and then applied to the gas slip nanofluidic simulation to quantitatively evaluate the leakage. The evaluation was finally validated by leakage experiments. This provides a valuable approach to explore the influence of the surface microscopic topology and the gas leak nanofluidic flow on the sealing performances.
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