Session: 12-12 Film cooling computational studies (II)

Paper Number: 127380

127380 - Numerical Investigation and Multi-Objective Structure Optimization of Transpiration Cooling on the Leading Edge of Turbine Blade 

 Transpiration cooling utilizing the micro-hole channel of the porous matrix is considered to have great application potential in the turbine blades cooling. This study comprehensively investigates the cooling performance of film cooling and transpiration cooling on the leading edge of turbine blade. The numerical results reveal that the advantages of transpiration cooling are the enhanced internal fluid-solid heat transfer and adhesion gas film, however, it comes at the cost of obvious increased pressure loss. Then the transpiration cooling is respectively studied assembled with homogeneous and gradient porosities and the latter scheme can achieve high cooling efficiency at the stagnation point through adjusting coolant distribution structurally. To obtain the best cooling performance of the transpiration cooling with gradient porosity, a new optimization process combining Computational Fluid Dynamics (CFD), Artificial Neural Network (ANN) and Multi-Objective Genetic Algorithm (MOGA) is proposed. This optimization process is implemented by the coupled simulation of commercial software ANSYS FLUENT and MATLAB through Text User Interface (TUI) and User Defined Function (UDF) of the former. The configuration parameters of the porous matrix are set as design variables, and the cooling efficiency and injection pressure are selected as optimization objectives. The simulation results show an improvement in the former and a reduction in the latter respectively through the optimization process.

Presenting Author: Taolue Liu Department of Thermal Science and Energy Engineering, University of Science and Technology of China

Presenting Author Biography: Taolue Liu, received the B.S. degree in aircraft propulsion engineering from Xiamen University, Xiamen, China, in 2019 .He is currently working toward the Ph.D. degree in engineering thermophysics in University of Science and Technology of China, Hefei, China.His research interests include two-phase fluid flow, porous medium and aircraft thermal porection.

Authors:

Taolue Liu Department of Thermal Science and Energy Engineering, University of Science and Technology of China
Fei He Department of Thermal Science and Energy Engineering, University of Science and Technology of China
Xiaorong Wu Department of Thermal Science and Energy Engineering, University of Science and Technology of China
Zhizhao Zhou Department of Thermal Science and Energy Engineering, University of Science and Technology of China
Yang He Department of Thermal Science and Energy Engineering, University of Science and Technology of China
Jianhua Wang Department of Thermal Science and Energy Engineering, University of Science and Technology of China