翼面フィンによる高負荷翼列2次流れ損失の低減に関する研究 Research on Secondary Flow Loss Reduction of High Loaded Cascade by Blade Fins

The high temperature gas turbine with high loaded turbine cascade is under development to prevent the global warming effect by the carbon dioxide and to save natural resources. The larger loss at the high loaded turbine cascade is generated by the horseshoe vortex and the passage vortex. In this research, flow visualization and the loss measurement were carried out to understand the behavior of the horseshoe vortex and its effect on the loss. The suction surface fins were tested as a countermeasure and proved to reduce the peak loss of the secondary flow.