Determination method for ablation residue ratio of heat-insulating material

Abstract

The invention relates to a detection method for thermal insulation performance of a rubber heat-insulating material used in the fields of guided missiles and spaceflight, i.e., a determination method for an ablation residue ratio of the heat-insulating material. The determination method comprises the following four steps: making and pretreatment of a to-be-tested member and marking of initial mass; determination and marking of a carbon residue ratio of a film; formation of a to-be-tested ablation member and marking of mass after ablation; and determination of an ablation residue ratio. Through the four steps, determination of the ablation residue ratio of the rubber heat-insulating material is realized; the method can reliably evaluate a residue amount consumed in scouring and exfoliation corrosion by high-temperature high-speed gas flow during the ablation process of the ablation member, greatly guarantees validity, safety and reliability of the heat-insulating material and has the advantages of easiness, accurate detection data, high control stability and good test repeatability.

Description

Technical field [0001] The invention relates to a detection method for the shedding residue of a rubber heat-insulating material used in the missile and aerospace fields, in particular to a method for measuring the ablation residue rate of the heat-insulation material. Background technique [0002] At present, the evaluation of the ablation performance of thermal insulation materials is mainly determined by the oxygen-acetylene ablation test method. By measuring the thickness change, mass change and back wall temperature of the specimen before and after ablation, the linear ablation rate, Parameters such as mass ablation rate and adiabatic index. However, this method cannot reflect the amount of ablation residue in the ablation process of the heat insulation material or the heat insulation layer, that is, the amount of residue that is washed away by the high temperature and high speed gas flow during the ablation process. In the prior art, There is no other measurement meth...

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Problems solved by technology

However, this method cannot reflect the amount of ablation residue in the ablation process of the heat insulation material or the heat insulation layer, that is, the amount of residue that is washed away by the high temperature and high speed gas flow during the ablation process. In the prior art, There are no other measures to evaluate this indicator

[0003] However, for the heat insulation materials used in power source devices such as missile servo systems, attitude and orbit control systems in the missile and aerospace fields, it is required that they cannot produce lumps and particles that may block the filter screen or nozzle during work. Shaped shedding residues to avoid fluctuations in the pressure curve of the missile combustion chamber and affect the maneuverability of the missile

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