JUSTIFICATION OF EFFICIENCY INDICATORS IN NOZZLE BLOCKS IN REACTIVE SYSTEMS ELEMENTS
All types of composites including carbon materials, used for manufacturing of flow path elements of nozzle unit of modern energy systems, exposed to thermal destruction of the surface when contacting with the chemical active flow [1]. That's why when calculating heatmass transfer coefficient, changes in the surface state should be considered, that are leading to an increasing in frictional resistance and heat transfer on surface in high temperature flow. Further, features of calculating heat-mass coefficient in nozzle blocks of reactive systems made of composites, will be associated with use of carbon materials as the most perspective materials for uncooled nozzle blocks in reactive systems elements.