Simulation of flow and heat transfer characteristics of laminated turbine blades with kerosene cooling channels

Abstract

An air-kerosene thermal mass coupled turbine blade with kerosene microchannels added to the traditional laminated structure turbine blade is proposed, and numerical simulations are carried out. The enhanced heat transfer mechanism of the air-kerosene thermal mass coupled turbine blade is studied, and the influence of different kerosene temperatures, blowing ratios, and solid thermal conductivity on the heat transfer of the laminated turbine blades is analyzed. The results show that adding kerosene microchannels can significantly reduce the blade temperature and change the cooling gas heat transfer direction inside the laminate cooling structure. Compared with the traditional laminate cooling structure, adding kerosene microchannels can significantly improve the heat transfer performance of the blades, and the integrated cooling efficiency increases by 31.7%. Moreover, when the kerosene temperature decreases from 400 K to 300 K, the cooling efficiency increases by 3.9%. Similar conclusions can be obtained by studying the increases in the blowing ratio and the solid thermal conductivity, respectively.