Characteristic Researching for Pyrotechnic Composition BB Pellet

This paper deals with the ignition dependability, inflammation-erode, and burning velocity for base bleed grain using testing method.

This paper deals with the ignition process of the base bleed grain consisting of NH 4ClO 4 (AP) and hydro terminated polybutadiene (HTPB) by the GC-45 igniter with the ignition composition ZrH 2+PbO 2 and modified igniter with the ignition composition Mg+PTFE.

The influence of the key parameters on the drag reduction of the base bleed method is obtained by numerical study.

This paper briefly reviews the general situation of investigations of base flow, the characteristics of a series of projectile boattails and the reduction technic in the base drag by using base bleed and external buring.

On the basis of the experimental results, some preliminary researches on the action mechanism of bottom air column charge have been carried out.

Rare particle two-fluid model used for base drag reduction performance about base bleed projectile;

To study the combustion mechanism and combustion control of base bleed unit at pressure transition,semi-closed bomb was used to simulate the process of abrupt drop of environmental pressure when the base bleed projectile was shot.

This paper explores the analogue concept and conditions of two base bleed projectiles in theory.

In this paper, the performance requirement of the pyrotechnic base bleeding agent used to extend the firing range and reduce the base drag of projectile was proposed and the formulation design and the base drag reduction by wind tunnel test were carried out.