New Propellant Combustion Performance And Its Impact Study

In this study, we used HNS as the combustion regulator and discussed the impact of HNS on the combustion stability of nitramine propellant. The combustion properties of nitramine propellant were evaluated by DSC and closed bomb tests. The results indicated that the suitable content and granularity size of HNS the burning rate pressure exponent could decline, the combustion stability was improved and the system behaved good burning rate temperature coefficient. At the same time, the system exhibited desired mechanical property because the percent of granularity is only 23%.The thermal degradation and combustion proprieties of Polyether-Urethane (JMZ) were tested by the DSC and closed bomb. The results showed that the DSC curves of JMZ consisted of two apexes and the average burning rate pressure exponent was relatively bigger. Especially, the burning rate pressure exponent is bigger than 1.3 at the range of common closed bomb pressure. Moreover, the burning rate pressure exponent of propellant declined as the improvement of pressure and is less than 1 when the pressure reached 300MPa. Additionally, the curves of lnu-lnP are slippery.To simulate the property of interior trajectory, we used VB to program. The performance parameters of interior trajectory consist with the results of closed bomb at all temperatures. Moreover, the larger the burning rate pressure exponent of propellant the more sensitive the pressure on the burnable thicken.