Abstract
Abstract Thermal devices (mechanisms) with porous coatings designed for combustion chambers of gas turbine units, as well as for cutting and drilling turbo foundations of power plants, which solve the problem affiliated with the appearance of cracks from the reflected wave, have been developed and studied. The porous coating provides a powerful thermodynamic screen in the similitude of three heat sources. The studies were unleashed on five samples with different porosity and hardness values (5 ÷ 30%). Thermal movements, deformations, and stresses were recorded on a holographic unit in real-time. A thermal device in the form of a rocket-type burner with a detonation jet has proved high efficiency for a capillary-porous and flow-through cooling system. Photographs of combustion chambers and nozzles studied depending on their geometry and thickening of the nozzle wall, an excess oxidizer (0.3 ÷ 0.8), and operating conditions until of the metal limiting condition (1106 W/m2) are presented. The optimal geometry of the chambers and nozzles either the type of porous structure was specified. It has been found that the economic effect is 200-300 $ for 1 burner, and the consumption of coolant is reduced several times.