چكيده فارسي :
Combined impingement and film cooling on a flat plate is studied by three-dimensional CFD simulation with conjugate heat transfer analysis. Independency of the results from mesh size is investigated, and the results are validated with experimental data from previous works. A novel optimization procedure offered, which has higher compatibility with gas turbine cooling systems, compared to previous work. In this procedure, coolant mass flow rate is minimized, subject to maximum temperature and maximum temperature gradient smaller or equal to those of base design. A simplified periodic geometry generated and three geometrical parameters of impingement holes, with higher impact on objective function, are selected as design variables and the other parameters are kept constant. By almost 250 observations during the optimization process, the solution converged to the optimum point, in which the coolant mass flow rate is reduced by approximately 29% compared to base design.
