Optimum design of impingement cooling system using differential evolution algorithm in the 2D-Nozzle linear of a turbofan engine

The inlet temperature to the nozzle of the turbine engine is one of the most influential parameters in increasing the thrust, Therefore it is necessary to use methods to increase the inlet temperature of the nozzle. impingement cooling is one of these methods, which by passing cooler air and then passing through jets, hits the hot wall of the nozzle and causes the heat of the nozzle wall to be absorbed. In this article, the optimization of impingement cooling system has been investigated in three dimensions. The studied geometry is the end walls of the nozzle, which is in the form of a flat plate. This plate includes cooling holes with a circular cross-section. The optimum design is to find the diameter and distances between of the holes. With coupling of software and the code developed with C programming language, different geometries for hole optimization are generated automatically by determining the appropriate constraints and the design is optimized. The optimization is multi-objective and the optimization algorithm is differential evolution. The goal of optimization is to reach a relatively uniform temperature and also temprature lower than the maximum temperature allowed in the nozzle wall. The results of multi-objective optimization are presented as a Pareto front.