Research on the Procedural Burning Characteristics of Cased Telescoped Ammunition Based on Digital Image Correlation Principle
The two-stage ignition and firing process of cased telescoped ammunition is experimentally researched to analyze the burning characteristics of charge and the movement characteristics of loadng and engraving. A high-speed camera system is used to capture the motion image sequences of every projectile group,and a test system for the procedural burning characteristics is devised and assembled. Based on the principle of digital image correlation,the image sequences are qualitatively and quantitatively analyzed,and the grooved morphology of the recovered band is analyzed and measured,so as to obtain the movement characteristics of projectile for one-stage ignition,the procedural burning characteristics for two-stage ignition,and the grooved morphology of the band. The findings demonstrate that the mass of fast-burning powder directly affects the loading performance of the first-stage ignition projectile. The loading time of projectile is significantly shortened and the loading speed is greatly increased when the mass of fast-burning ignition powder is increased. The premature fragmentation of combustible guide tube leads to a significant increase in the loading speed,resulting in a very poor band grooved morphology,which does not reliably seal the rear powder gas and steer the projectile motion,thus affecting the interior ballistic trajectory performance and the in-bore motion attitude of projectile. The reasonable matching design of fast-burning ignition powder and combustible guide tube can keep the break-up timing of combustible guide tube in a controllable range,so as to realize the ideal two-stage ignition and procedural burning design objectives.
万方数据
维普
