TY - JOUR
TI - Influence of mainstream Reynolds number and mass-flow ratio on the film cooling efficiency of turbine blades
AU - Zhang Lina
AU - Cao Kunpeng
AU - Li Junfen
JN - Thermal Science
PY - 2026
VL - 30
IS - 2
SP - 1179
EP - 1190
PT - Article
AB - It is imperative to implement advanced blade cooling technologies to ensure  the seamless functioning of aeroengine turbine blades in high temperature  environments. The mainstream flow is a pivotal factor influencing the film  cooling efficiency of turbine blades. In this paper, the influence  mechanism of the main-stream flow on the film cooling efficiency of turbine  blades under different main-stream Reynolds numbers and mass-flow ratios is  thoroughly investigated. The distribution laws of the cooling efficiency on  the pressure surface and the suction surface, as well as the changes in the  flow velocity of the central section of the blade, are elaborated in detail.  The findings of the research indicate that when the mass-flow ratio is  fixed, the cooling efficiency is higher under conditions of a lower  mainstream Reynolds number. As the mass-flow ratio increases, the influence  of the mainstream Reynolds number on the cooling efficiency gradually  weakens. The cooling efficiency on the pressure surface experiences a  decrease, while that on the suction surface initially decreases and  subsequently increases. Furthermore, an increase in cold air-flow results in  a greater accumulation of film in the middle-height region of the blade.  This phenomenon enhances the cooling efficiency in this specific area.  However, the enhancement of cooling efficiency along the upper and lower  wall surfaces is not substantial.
DO - 10.2298/TSCI2602179Z
ER -