Influence of additives on the characteristics of the combustion of layered systems imitating composite propellants

Abstract

This article is an overview, containing both new research data and results of published works. Using a layered system model that takes into account chemical processes and heat and mass transfer, proceeding in the one and two-zone combustion modes, we considered various types of combustion systems comprised of two components: base propellant and various additives, such as organic materials (decomposable, evaporable, oxidizeable), energetic materials, coolants, catalysts, and metals. Based on analytical-form results, the combustion characteristics are calculated as functions of the pressure, size of the components, and physicochemical properties of the system. In a number of cases, complex dependences are observed, for example, areas with an accelerated or retarded growth of the burning rate with increasing pressure, and extrema in the dependences. A comparison of calculation results with experimental data demonstrated a good qualitative agreement. The results can be used in developing solid rocket propellants with the required ballistic properties.