Propellant Plasma Ignition Combustion To Suspend The Pilot Study

The electrothermal-chemical (ETC) gun is an advanced propulsion concept that uses plasma for ignition and combustion control, it enable to improve gun performance obviously. Now, it has aroused more and more concern in many countries. The interactions between plasma and solid propellants in electrothermal-chemical guns are studied theoretically and experimentally. The dissertation is mainly discussed as follows:The experimental setups of the interrupted-burning test are designed and manufactured. A series of experiments have been performed to investigate mechanisms of plasma-propellant interactions. The results show that the ignition difficulty and ignition delay time are different for different type of propellants in the same condition, it is related to the physical and chemical properties of propellants and the charges. It is favorable to ignite and increase burning rate to increase the input of electrical energy. The different plasma generator with different discharge efficiency is very important to performance of plasma ignition.The electron microscope and X-ray fluorescence spectroscopy have been used to character the residual propellants from both plasma and conventionally ignited samples, the results indicate that there are significant changes in color and surface structure of propellant samples recovered after plasma ignition, due to ablation and radiation, and the content of the present metal Cu detected on propellants' surface is higher than the conventionally ignited samples, it is brought by plasma injection.Compared with conventional ignition, plasma ignition has showed some benefits, shorter ignition delay time, enhanced combustion, and ignited consentaneously, and so on.In theoretically, the hot spot model of plasma ignition is studied, it can describe the ignition behaviors at a qualitative level and analyze all sots of effects.