![]() ![]() ANSYS CFX is used to perform 3D numerical simulations of a flat plate with a single row of lidded holes, in which the k–ε model approximates turbulence effects. This paper proposes a novel shape of film cooling injection hole, called lidded hole, that can offer significant enhancement of cooling performance. Comparing all analyzed configurations, the best cooling effectiveness was reached for the model 9 (W = 3d, B = 1.5d).įilm cooling is one of the promising technologies used for protecting rocket nozzles and turbine blades from combustion chamber hot gases. However, slight effect of block length on cooling effectiveness was obtained. The result indicated that block width variation has a considerable impact on film cooling performance. Good agreement was obtained by comparing the analysis results with the experimental data. The turbulence model shear stress transport (SST) is used for approximating turbulence. For each case, the effect of blowing ratios (0.5 and 1) was investigated. ![]() Nine configurations of the crescent shaped blocks were considered. ANSYS CFX was used to conduct analysis of a flat plate configuration with cylindrical holes. The main objective of this research work is to investigate the influence of the crescent-shaped block length and width on film cooling effectiveness. ![]() A crescent-shaped block placed downstream of the injection hole can significantly improve cooling effectiveness. Turbine blades and rocket nozzles can be efficiently protected from combustion chamber exhaust hot gases by film cooling technic. ![]()
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