C-12 部分流入段閉止部周りにおける損失発生メカニズムに関する研究(蒸気タービン,一般講演)

• 笹尾 泰洋

  帝京大

• 高田 真司

  東北大

• 山本 悟

  東北大

• 田沼 唯士

  帝京大

書誌事項

タイトル別名

• C-12 Study on Loss Generation Mechanism around Blockage Region in Partial Admission Stage

抄録

Reduction of HP inlet loss is quit important to improve the performance of HP steam turbines. In this paper, the loss generation mechanism in separation flows around the blockage of a partial admission stage is discussed using the 3-D and the 2-D high-order high-resolution numerical methods developed by our group. Compressible Navier-Stokes equations are solved by the high-order high-resolution finite-difference method based on the fourth-order compact MUSCL TVD scheme, Roe's approximate Riemann solver, and the LU-SGS scheme. The SST-model is solved for evaluating the eddy-viscosity. Unsteady three-dimensional flows through half-arc nozzle-rotor cascade channels considering a partial admission are numerically investigated. 54 nozzle passages with two blockages and 30 rotor passages are simultaneously calculated. Entropy distributions around the rotor blades and the blockage regions are numerically predicted.

収録刊行物

• ガスタービン定期講演会講演論文集

  ガスタービン定期講演会講演論文集 (40), 279-282, 2012-10-17

  公益社団法人日本ガスタービン学会

キーワード

• partial admission stage
• loss generating mechanism
• numerical turbine

詳細情報

• CRID: 1573950402606121728
• NII論文ID: 110009863474
• NII書誌ID: AN10255898
• ISSN: 09191941
• 本文言語コード: ja
• データソース種別:
  • CiNii Articles