Hydroxy-terminated polybutadiene propellant thermal safety evaluation model based on multi-scale simulation modeling

Abstract

The invention relates to a multi-scale model for thermal safety evaluation of a hydroxy-terminated polybutadiene propellant. The multi-scale model which has clear physical significance, high accuracy and high adaptability is built from the meso-scale to the macro-scale on multiple complicated physical-chemical phenomena of heat conduction and chemical reaction of the hydroxy-terminated polybutadiene propellant. The method for building the model comprises the steps of building a meso calculation model of the hydroxy-terminated polybutadiene propellant, determining the multi-scale correlation method from meso to macro, and building a macro calculation model of the hydroxy-terminated polybutadiene propellant. Compared with the prior art, the multi-scale model has the advantages that the evaluation system adopted by the method includes two scales which are the macro scale and the meso scale, and three levels which are storage environment, grain structure and hydroxy-terminated polybutadiene propellant microstructure, the structure is clear, and decomposition and combination are easy, multi-scale evaluation of various levels of safety performance can be achieved, and the multi-scale model is simple and easy to obtain.

Description

technical field [0001] The invention belongs to the technical field of thermal safety assessment and simulation technology of hydroxybutyl propellant, and relates to a multi-scale model for thermal safety assessment of hydroxybutyl propellant. Background technique [0002] For the decomposition of hydroxybutyl propellant by heat, it is usually accompanied by the release of heat. If the heat released by thermal decomposition cannot be diffused to the surrounding environment, it may cause spontaneous combustion or even an explosion accident. [0003] The thermal safety mechanism of hydroxybutylene propellant is affected by both the mesoscopic composition and the macroscopic structure. In the mesoscopic composition, the heat is mainly generated by the decomposition of oxidant particles, and the heat is transferred through the adhesive matrix. If the matrix cannot quickly diffuse the energy released by the decomposition of the exothermic components, it will promote the generati...

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Problems solved by technology

[0004] In the prior art before the present invention, the relevant literature retrieved has: [1] Jia Xiangrui. A new method for evaluating the safety and compatibility of explosives [J]. Military Engineering Journal, 1995: 85-88 ; [2] Feng Changgen. Hot Fire Theory [M]. Jilin Science and Technology Press, 1991; [3] Jing Songji. Study on the Cook-off Mechanism of Condensed Explosives and Two-dimensional Numerical Simulation [D]. Changsha: National University of Defense Technology, 2004; [4] Chen Minghua. Temperature change law and safety analysis of box-packed propellant [J]. Acta Chemical Industry, 2001, 52(1): 61-63; in the above-mentioned related literatures, no public information about hydroxybutyl propellant has been found. Contents of a multiscale model for thermal safety assessment

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