In the present work experimental data from seven perforated (7PF) JA2 propellantcombustion in a micro closed bomb is presented and the linear burning rate of the JA2propellant is determined. The burn rate measurement is based on a sophisticated lumpedparameter model which accounts among other things for arbitrary cross sectional propellantgeometries with the help of the ICT-Cellular-Combustion-Algorithm (ICCA), pressuredependent thermophysical parameters and heat loss. The model is used to construct avivacity based objective function which depends on the parameters of the empirical law forthe linear burning velocity. With the Nelder-Mead downhill simplex optimization algorithmthe objective function is minimized and the burn rate parameters determined. Thecomparison of the results to published data show that with the new burn rate measurementmethod the linear burning rate can be determined with great accuracy even when only a fewpropellant grains with a total propellant mass of less than 8 g per shot are used.
展开▼
