三次元乱流解析によるラビリンスシール内の流体力解析

概要

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A numerical method based on a finite volume approach has been proposed to estimate the rotordynamic forces on an eccentric labyrinth seal. The general orthogonal coordinate system is applied to the Reynolds averaged Navier-Stokes equations in order to accommodate the geometry of interest efficiently. The SIMPER algorithm and the low Reynolds number κ-ε turbulence model are used to compute the complex turbulent flow field within a seal. To verify the validity of the proposed method, the turbulence in a three-cavity labyrinth seal with an inlet swirl has been calculated. The results are compared with the experimental data in previous reports, and good agreement is found. It is shown that the details of the flow field near each labyrinth fin should be rigorously taken into account to estimate the rotordynamic forces accurately, and that the labyrinth fin has more effect on the tangential force component than on the radial one. The proposed method has been proven to be an effective tool for estimating rotordynamic forces.
社団法人日本機械学会の論文
1996-08-25