Numerical study of heat transfer using heat-flow coupling method for turbine blade with air cooling

Aim. In China, we are among the first to employ heat-flow coupling method for numerically studying heat transfer in turbine blade with air cooling. In order to ascertain how effective this method is, we apply it in this paper to two numerical cases. This paper consists of two sections. The first section deals with a brief summary of the heat-flow coupling method. The second section deals with the two numerical cases in two subsections; 2-D laminar flow around a flat plate with blunt leading edge (subsection 2.1) and heat transfer in Mark II turbine blade (subsection 2.2). In subsection 2.1, the Nusselt numbers calculated with heat-flow coupling method are found to agree very well with the analytical solution given in Hermann Schlichting's book^[5]; this shows that heat-flow coupling method is effective in solving conjugate heat transfer problem. In subsection 2.2, we calculate with heat-flow coupling method two temperature distributions and two pressure distributions in Mark II turbine blade, which we find agree respectively fairly well with the experimental temperature distributions and experimental pressure distributions given in Ref.6 authored by L.D. Hylton et al. The two cases show preliminarily that heat-flow coupling method is feasible and effective.