Explanation

The substance undergoes intense redox reaction, accompanied by heating and luminescence. Generally, the so-called combustion refers to the violent oxidation-reduction reaction caused by the combination of certain substances (such as firewood, carbon, coal, oil, etc.) and oxygen in the air. propellant contains enough oxidizer. No air or additional oxidizer is required for combustion. Its combustion process is a complex physical chemistry process. The surface of propellant is heated by ignition and begins to decompose and gasify. The products after gasification continue to undergo chemical reactions in the gas phase. Until the final combustion product is generated. And release the chemical energy stored in propellant: The whole combustion process can be carried out stably by its own role. At the same time, there is also the "mass transfer process" of heat transfer from high-temperature gas phase to solid phase surface, decomposition substances and combustion products flowing outward from propellant surface and forming mutual diffusion. This series of processes is carried out under high temperature and pressure, and the reaction speed is very fast. And it is completed in the relatively narrow combustion reaction zone. The existing combustion theories are very complicated assumptions and simplifications of combustion process. Idealize it. Although the results obtained are not accurate - they can only qualitatively explain some phenomena and trends, they can still be used to understand the essence of propellant combustion and guide the burning rate of propellant. Adjustment and design of propellant formula. combustion of propellant can be divided into complete combustion and incomplete combustion according to the degree of reaction: according to the stability of combustion, it can be divided into steady combustion and unsteady combustion - unsteady combustion, including oscillating combustion, combustion to detonation, etc.

Classification