部分切口多孔杆状发射药的燃烧性能

Combustion Characteristics of Partially Cut Multiperforated Stick Propellant

部分切口多孔杆状发射药可明显提高装药的装填密度,合适的切口参数是保持部分切口多孔杆状发射药良好燃烧渐增性的关键之一。为了获得合适的切口参数,设计并制备了不同弧厚、异向切口间隙、同向切口间距和切口宽度的19孔杆状发射药,进行了密闭爆发器试验,研究了切口参数对发射药定容燃烧性能的影响,并和相应的多孔粒状药燃烧性能进行了比较。结果表明:具有合适切口距的部分切口多孔长杆状发射药可以获得和相同药型的多孔粒状药相近的静态燃烧性能;本研究药型条件下,同向切口间距小于20 mm时,发射药的渐增性燃烧表现较佳,侵蚀燃烧不明显。

In order to obtain the appropriate incision parameters, stick propellant of 19 holes with different web, synclastic incision intervals, incongruous incision intervals and incision web were prepared and studied by closed-bomb test. The influence of inci- sion parameters on constant volume combustion performance was studied and compared with that of porous granular propellant. Results show that the partially cut multiperforated long stick propellant with proper incisions can obtain similar static combustion performance with the granular propellant. In this study, the progressive burning is good and erosion burning is not obvious when synclastic incision intervals is less than 20 mm.