Plasma Ignition, The Theoretical Analysis And Research Of Model

Ignition and enhanced burn of solid propellants using plasma as a heat source is a concept of growing interest. A lot of experiments on propellant ignited with high-energy hot plasma have been made. However, little attention was paid on theoretical analysis in this field.Some mathematical models of propellant ignition in plasma have been established. Most of the models focus on the deal with boundary conditions due to the different physical phase change of the energy particle in the hot plasma or some other new conditions which was introduced by the great temperature grads caused by hot plasma. As far as the govern equations of the models are concerned, a classical heat conduction equation are used which are based on the heat transfer principle of Fourier. As a matter of fact the Fourier principle imply a premise that the heat conduct velocity is infinite which will work in the traditional case and will distort in a extremity case such as strong transient state. In this thesis a new plasma ignition model is established which introduces Nonfourier analyses to this field. We focus on the analytical result of the model established in order to know the basic rule of a particle heating history in plasma. At the same time the numerical simulation is also used to rich the analysis. The results show that weather there is heat wave in the particle heat transfer is determined by thermal relaxation time of the particle material and the size of the particle and the temperature of the plasma has a drastic influence on the burning rate.However more study is needed to get further progress, what we have done is only a small aspect of this field.