1627 タービン多段翼列を通る湿り蒸気流れの陰的並列計算(J12-1 流体機械に関連した流体解析と数値最適化技術(1),J12 流体機械に関連した流体解析と数値最適化技術)
詳細
Wet-steam flows through 2-D and 3-D multiple-stage turbine cascades are numerically investigated. Fundamental equations contain conservation laws of water vapor, water liquid, the number density of nucleus, momentum equations, and the energy equation. The SST turbulence model is employed to predict the eddy viscosity. The classical condensation theory is used for modeling homogeneous and heterogeneous condensations. These equations are solved by the fourth-order compact MUSCL TVD scheme and LU-SGS scheme. A parallelized LU-SGS method based on the pipelining method is newly employed for the parallel-implicit time-integration. As numerical examples, 2-D and 3-D flows of wet steam through two-stage stator-rotor cascade channels in a steam turbine are computed.
