Numerical Simulation of Moisture Diffusion of Composite Solid Propellant

doi:10.16182/j.issn1004731x.joss.2018010037

Abstract

Abstract: In order to elucidate the humidity aging mechanism of composite solid propellant, the diffusion and the distribution of moisture inside the composite solid propellant under humidity was evaluated through the hygroscopic test of propellant. The mathematical and the FE model of moisture diffusion were proposed. The FEM was employed to simulate the moisture diffusion inside propellant. Moreover, the factors that affect the moisture diffusion were analyzed. The results showed that the humidity FEM can be used to simulate the hygroscopic process inside propellant. The temperature can affect the moisture diffusion. The higher the temperature is, the greater the coefficient and the diffusion speed of moisture are. Furthermore, the dimension of propellant specimen can also affect the moisture diffusion. That is, the diffusion speed of moisture becomes smaller with increasing the dimension of propellant specimen, and then the time to reach equilibrium becomes longer.

Key words: composite solid propellant, moisture diffusion, finite element method, relative humidity, moisture distribution

CLC Number:

V512

Wang Yufeng, Li Gaochun, Zhang Xudong, Qu Kai, Li Jinfei. Numerical Simulation of Moisture Diffusion of Composite Solid Propellant[J]. Journal of System Simulation, 2018, 30(1): 285-291.

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