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http://dx.doi.org/10.5293/kfma.2013.16.3.039

Analysis of a Rim-Seal with a Semicircular Rib or Groove  

Lee, Chung-Suk (Department of Mechanical Engineering, Graduate School, Inha Univ.)
Moon, Mi-Ae (Department of Mechanical Engineering, Graduate School, Inha Univ.)
Kim, Kwang-Yong (Department of Mechanical Engineering, Inha Univ.)
Publication Information
The KSFM Journal of Fluid Machinery / v.16, no.3, 2013 , pp. 39-47 More about this Journal
Abstract
Effect of semicircular rib or groove on the performance of a rim-seal was evaluated using three-dimensional Reynolds-averaged Navier-Stokes equations. The turbulence was modeled using the one-equation Spalart-Allmaras turbulence closure model. Reynolds number based on the axial chord of the turbine blade was 500,000 at the mainstream outlet. The numerical results for a sealing effectiveness was validated in comparison with experimental data. To examine the effect of the semicircular rib or groove on sealing effectiveness of the rim-seal, location and diameter of the rib or groove were selected as the parameters to be performed. The rim-seals with the semicircular groove showed a higher sealing effectiveness than that with the semicircular rib. The semicircular groove installed on the stator side showed best sealing effectiveness among the numerical simulation results.
Keywords
Rim-seal; Sealing effectiveness; Spalrt-Allmaras turbulence model;
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