Conjugate Heat Transfer from an Impingement and Film-Cooled Flat Plate

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Abstract
The effect of solid thermal conductivity on conjugate heat transfer from a flat plate with combined impingement and film cooling is studied both experimentally and computationally. One side of the plate is exposed to hot mainstream, whereas the other side is impinged with air jets. A flow configuration with multiple staggered rows of cylindrical film holes and a matrix of impingement holes is considered. A thermochromic liquid crystal technique is used in the experiment to measure the surface temperature of the plate. The physical domain is meshed with fine-sized hybrid: hexahedral and tetrahedral grids suitable for the finite volume computations. Reynolds-averaged Navier–Stokes equations are solved with shear-stress transport κ-omega turbulence modeling. A grid independence study is carried out using a grid convergence index method. A validation exercise of computational results is carried out against the full coverage film cooling data available in literature (“Total Cooling Effectiveness on A Staggered...

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