Intensification of Heat Transfer by Optimizing the Geometric Parameters of the Fins in the Cooling Channels of the Turbine Blades

The use of turbulizer fins in the internal cooling space of the turbine blade makes it possible to significantly intensify the heat transfer characteristics in the channel. The V‑shaped fins have a high degree of heat exchange intensification, and also provide the minimum possible loss of air flow pressure in the channel of the outlet edge of the cooled turbine blade with blowing into the trailing edge and lower part. In this article, various computational models have been created using numerical modeling, one of which includes V‑shaped edges with different heights and the distance between them (pitch). The influence of the geometric parameters of the V‑shaped fins on the heat exchange process in the channels of the turbine blade is estimated, and the best combination of the geometric characteristics of the fins is obtained using numerical modeling. The results of the study show that increasing the height of the fins and decreasing the distance between them intensifies the heat exchange process, but at the same time it leads to an increase in hydraulic resistance. Using the Nusselt number as an optimization parameter for various geometric parameters of the V‑shaped rib allows us to determine that the heat transfer coefficients of the optimized model have increased significantly, and the average Nusselt number in the channel has increased by 29.54 % compared to the original model.