Experimental study on the performance of pyrotechnic igniters

摘要

AbstractA special igniter case designed by Dynamit Nobel AG was used for measuring the energy output of four different igniter formulations in terms of gas pressure, flame temperature, and gas velocity in order to study the performance of pyrotechnic igniter systems, and to evaluate the energy flux at the igniter vent. Four igniter systems were defined which consisted of (a) B‐KNO3, (b) black powder, (c) nitrocellulose, and (d) mixtures of nitrocellulose with black powder. Firings into open air, propellant dummy loads, and propellant beds were carried out with these igniters to obtain their general characteristics. It has been found that the vent characteristics of these pyrotechnic igniters are determined by the confinement conditions used. The energy flux at the igniters vent increased considerably for firings into inert or active propellant bed