しゅう動面に四角穴パターンを有する液膜シールの動特性(機械力学,計測,自動制御)

概要

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The theoretical and experimental study is carried out to investigate the dynamic characteristics of the liquid annular seals with a square-hole pattern in seal stator. The mometum equations with turbulent coefficients and the continuity equation, which are averaged across the film thickness, are numerically solved in consideration of the pressure jumps at each step between the land and the square-hole regions. This pressure discontinuity is evaluated based on the continuity of volume flow rate across each step and the generalized Bernoulli equation. The numerical results of the dynamic fluid force and the dynamic coefficients agree well with the experimental results, which prove the validity of the numerical analysis. The effects of the inlet swirl velocity on the dynamic coefficients and the whirl-frequency ratio are also described for the square-hole pattern seal as well as the annular plain seal with smooth surface and the parallel-grooved seal.
社団法人日本機械学会の論文
2008-12-25