Session: 12-14 Film cooling computational studies

Submission Number: 179477

Numerical Investigation on Cooling Performance of Transpiration-Film Cooling Combined With Silica Aerogel Coating on a Turbine Vane 

To meet the stringent thermal protection requirements for turbine blades in next-generation gas turbines, the combined transpiration-film cooling strategy presents significant application prospects. However, previous studies have mostly relied on simplified flat-plate models, leaving insufficient understanding of the combined cooling mechanism under the complex curvature and aerodynamic conditions of real turbine blades. This study aims to investigate the cooling and flow characteristics of combined transpiration-film cooling on a real C3X blade through numerical simulation. First, high-temperature wind tunnel experiments were conducted on a flat-plate combined transpiration-film cooling structure to validate the reliability of the computational model and numerical method. Subsequently, a validated numerical method was used to systematically investigate the cooling characteristics of combined cooling under different coolant blowing ratios on a real C3X model under realistic gas conditions. The results provide detailed analysis of the cooling efficiency distribution, the uniformity of the temperature field, the coverage and development characteristics of the cooling film, and the synergistic mechanism between the two cooling methods. The results demonstrate that this cooling method not only provides uniform base cooling for heat-loaded areas such as the blade leading edge, but also effectively improves the wall adhesion of the downstream film and suppresses entrainment of the main flow. This study provides new insights into the transpiration-film cooling coupling mechanism and offers valuable guidance for advanced thermal management design of gas turbines.

Presenting Author: Yatong Zhao University of Science and Technology of China

Presenting Author Biography: A PhD candidate from the University of Science and Technology of China, whose main research direction is advanced aircraft cooling technology, such as transpiration cooling and film cooling.

Authors:

Yatong Zhao University of Science and Technology of China
Fei He University of Science and Technology of China
Caiyi He University of Science and Technology of China
Shupeng Xie University of Science and Technology of China
Hongyu Tao University of Science and Technology of China