A Measuring Model for Ammunition Thermal Hazards Used in Full-Scale Fire Tests

Abstract

The invention discloses an ammunition thermal disaster measurement model applied to full-size fire tests. The ammunition thermal disaster measurement model comprises a projectile body and different inert filling media arranged in the projectile body, wherein the projectile body is designed with a full-size shell according to real ammunition appearance characteristics, the projectile body is prepared from the same material as the ammunition, and the different inert filling media are filled to respectively replace explosives and solid propellants in the ammunition. The ammunition thermal disaster measurement model further comprises a fixed thermocouple paster and Pt thermocouple wires, wherein the fixed thermocouple paster and the Pt thermocouple wires are respectively arranged on the surface of the projectile body and in the projectile body by a thermocouple support to be respectively used for measuring an external temperature and an internal temperature of the model; furthermore, the inner Pt thermocouple wires are unevenly distributed based on a heat conduction gradient. According to the ammunition thermal disaster measurement model disclosed by the invention, two aspects of selfthermophysical property of the model and instrument measurement precision are taken into consideration, similarity between the self thermophysical property of the model and real ammunition is enhanced, and meanwhile instrument measurement precision is improved; thus, testing accuracy of temperature rise characteristics of the surfaces and the insides of the ammunitions in the full-size fire testsis improved.

Description

technical field [0001] The invention relates to an ammunition thermal hazard measurement model for full-scale fire tests, which is used for measuring the surface and internal temperature rise characteristics of ammunition in the full-scale fire tests. Background technique [0002] The explosion of ammunition such as missiles in a fire is mainly due to the accelerated chemical reaction caused by the explosive or propellant inside the ammunition being heated in a fire. Investigating the temperature rise characteristics of the surface and interior of the ammunition in a fire environment can achieve the purpose of studying the safety of ammunition overheating and misfire. However, real ammunition is difficult to measure due to fire escape characteristics and is highly dangerous, and the scaled-down model has difficulties such as large measurement errors due to scale effects. Therefore, it is extremely necessary to develop a safe, effective, and accurate alternative to missiles a...

AI Technical Summary

Problems solved by technology

However, real ammunition is difficult to measure due to fire escape characteristics and is highly dangerous, and the scaled-down model has difficulties such as large measurement errors due to scale effects. Therefore, it is extremely necessary to develop a safe, effective, and accurate alternative to missiles and other ammunition for fire tests. The thermal disaster measurement model measures the surface and internal temperature rise characteristics of the ammunition, providing important support for the follow-up research on major fire prevention and control in my country

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