An investigation of the conjugate heat transfer in an intercooled compressor vane based on a discontinuous Galerkin method

In recent years, the convective cooling channel has been applied in the compressor vanes to improve the efficiency of Brayton cycle. In order to investigate the influence of cooling on the aerodynamic and heat transfer performance of an intercooled compressor vane, a discontinuous Galerkin (DG) method has been employed in this paper. The DG method has been verified by using a typical turbine vane problem and the results are in good agreement with the experimental data. A two-dimensional intercooled compressor vane with five cooling channels has been numerically simulated in different conditions. The results are compared with the one without cooling. The effect of cooling on the boundary layer under an adverse pressure gradient has been given, and the relationship between Nusselt number (Nu) and Reynolds number (Re) on the fluid-solid interface has been analyzed.