硼系延期药燃烧特性分析

采用高速摄影技术对B/BaCrO4延期药的燃烧特性进行实验研究,结果表明:B/BaCrO4延期药的燃烧过程由一系列脉动燃烧组成,燃烧过程中存在明显的气体流动,并且生成熔融状液滴或层状燃烧产物;产物对气流的阻力作用导致燃烧表面处压力大于环境压力,达到固体产物强度时,产物剥离燃烧表面,并且随着气流流动;B含量为14%的B/BaCrO4延期药燃烧形成的层状物层厚为1.2 mm,剥离周期为17.8 ms;B含量为8%~16%时,B/BaCrO4延期药的燃速随着B含量的增加而增大。

Analysis on Combustion Characteristics of B/BaCrO4 Delay Composition

Combustion characteristics of B/BaCrO4 delay composition were obtained by the technique of high speed camera.Results show that there exist the pulsed combustions and gas flow in the combustion process of B/BaCrO4 delay composites.The condensed phases of products depend on the content of B,in which the phase is melted drops at lower content of B,but layered substances at higher content of B.When the different pressure of the composition surface is stronger than the stress strength of the solid products,the solid products will be pulled from the composite surface and flow with the gas.The thickness of layered substance of 14% B was 1.2 mm,and the blowed periods of layered substance of 14% B was 17.8 ms.The burning rate of B/BaCrO4 delay composites increase with the content of B in the range of 8%-16%.