Generation of hydrodynamic instability in the gasification zone of solid rocket fuel

This paper presents the new way of the occurrence of “natural” turbulence in the Gusachenko–Zarko mechanism of negative erosion effect during the of combustion fuel. It is shown that the gasification zone of a solid fuel can generate hydrodynamic instability if its burning rate at a constant temperature depends on the pressure. The hydrodynamic instability of the combustion of fuels that decompose according to the solid phase $\to$ liquid phase $\to$ gas and solid phase $\to$ gas scheme occurs under quite different conditions. The gasification zone in fuels of the first type is more inclined to instability generation than that in fuels of the second type. The hydrodynamic instability occurs as the value of the Reynolds number is exceeded, which depends on the properties of the fuel and environmental conditions.