Movement Dynamics Of Firework Shells Fired From Mortars

V. Ya. Yakovlev and S. K. Chankaev

Abstract: Experimental investigations were carried out using 125 and 310 mm firework shells. The pressures in a mortar during firing were measured. A mathematical model of the firing action concerning low pressure in the space behind the shell was developed. Here it is supposed that non-simultaneous processes of ignition and combustion of black powder particles as well as outflow of combustion materials through the gap between the shell and mortar walls limit the pressure increase. We determined the usage limit of zero-dimensional mathematical models of firing, defined kinetic characteristics for the process of flame spreading through black powder particles, analyzed the results and carried out a comparison between the calculated and experimental results of shots for firework shells of 125 and 310 mm. The calculation results were used to design 2А85 self-propelled mountings for launching shells with integral lifting charge and for the improvement of 2A30 self-propelled mountings for launching shells with integral lifting charge.

Keywords: Mathematical model, firework, ignition, combustion, flame, powder, muzzle velocity, self-propelled launcher, shell, self-propelled mounting


Ref: JPyro, Issue 27, 2008, pp23-29
(J27_23)


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