流れ制御デバイスを用いたフィルム冷却の高効率化に関する研究

-Dimple形状最適化-

抄録

This paper describes attempts to optimize flow control devices (Dimple), which was invented by one of the authors for achieving better film cooling performance of gas turbine cooling holes. In the past study, it was confirmed that film cooling performance can be improved by adding flow control devices (DFCD) which is a three-dimensional protrusion shape. However, it was also identified that DFCD did not perform well at high density ratio and low blowing ratio condition, i.e., DR=1.53 and BR=0.5. Therefore, in this research, we devised Dimple type device which is three dimensional dimple shape newly, and worked on Dimple shape optimization under high density ratio and low blowing ratio condition.