A 2D two-layer model for the topology optimization (TO) of turbulent flow is established in this study. The TO of the regenerative cooling channel, which is part of the active thermal protection system in hypersonic airbreathing engines, is carried out using this developed 2D two-layer model. The model development and parameter selection incorporate the analysis of thermal resistance and the 3D simulation of the airfoil structure. A comparative investigation is conducted to explore the impacts of intermediate density and wall function on TO of turbulent flow. An optimized structure that outperforms conventional structures is obtained by setting the maximum temperature of the solid base as the objective function and the pressure drop as the constraint in the optimization problem. In addition, various optimized structures are generated by altering the pressure constraint, Reynolds number (Re), and thermal boundary condition. The 3D simulation and the comparison among them reveals that optimized structures generated under a larger pressure constraint, lower Re, and non-uniform thermal boundary condition show better overall performance.
 

2D two-layer model,Regenerative cooling channel,Turbulent flow,Topology Optimization (TO)