The effects of fast-burning energetic compound ACP with various contents in propellants on the combustion properties of low-burning rate,medium-burning rate,high-burning rate HTPB propellants were investigated by Crawford test and firing test of neutral burning Ф64mm motor.
Through the plasma erosion test, small erosion motor firing test and microstructural observation,the erosion properties of carbon/carbon composites prepared by the chemical liquid deposition were studied, the microstructural changes of carbon/carbon composites before and after ablation were analyzed,and the ablation mechanism of the composite used for motor throat and exit cone was discussed.
The examination has been made with SEM for the Molybdenum nozzle of the anti-tank missile after passing the firing test. The erosion mechanism of the molybdenum nozzle is investigated, including all factors such as plasticity-cohesiveness fluxion, mechanical abrasion, cold-hot brittle crack, eutectic melting, chemical corrosion, etc.
Finally, The ignition tests with and without spoilers under the static conditions and the ignition tests for the spoiler joint-operation driven by the simulated signals under the dynamic conditions have been conducted.
Based on a lot of single ignition tests, the influence of mass of ignition powder, initial ignition volume, the design status of the nozzle closure and environmental conditions on the ignition characteristic of igniters were also analyzed. According to the single ignition tests results, some measures, such as changing the ignition manners, adjusting the ignition charge etc, had been adopted in the redesign of the igniter.
The influence of the atmospheric conditions such as the oxygen concentration and its pressure on the spontaneous ignition behaviour of activated carbon was investigated with high pressure DSC (HP-DSC), TG-DTA and SIT (spontaneous ignition test).
Design considerations have been developed for a compact ignition test reactor (CITR).
A simple ignition test is performed to determine if substances are organic or inorganic.
For this test case we expand the 0D ignition test case to include spatial terms to model diffusion.
The ignition test is used to estimate the approximate flash point of the material.