先端シールすきまを有するタービン段落流れの数値解析

概要

論文の詳細を見る
A numerical technique for the computation of three-dimensional compressible turbulent flows through a turbine stage which has a shrouded bucket with tip seal clearance, is presented. In the present analysis, a two-equation model of turbulence is introduced to estimate the turbulence effect. To calculate nozzle and bucket flow regions simultaneously, a steady interaction is assumed on the interface. To compute the flow through the tip seal clearance, a computational mesh system is generated in that flow region. A finite volume method is used to obtain the spatially discretized governing equations, while the damping surface technique is employed for the time integration. In order to verify the effectiveness of the present method, a computation for the flow through a turbine stage is carried out. The present method yields circulating flows between tip seal fins, and a mixing flow phenomenon in the downstream region of the shroud, and the computational result shows good qualitative agreement with the experimental data.
一般社団法人日本機械学会の論文
1994-08-25