高速摄影法研究铅芯延期体的燃烧特性

用高速摄影仪对卡在透明塑料管中的铅芯延期体从点火到喷火的过程进行了拍摄.图像显示,在铅芯延期体点火端有一段延期药与点火药头一起在很短的时间内完成燃烧过程;在铅芯延期体喷火端有一段延期药被喷出,铅芯延期体未起延期作用.将燃烧后的铅芯延期体沿药芯切开,显微镜下观察残渣,发现有的残渣呈层状龟裂.根据结果,对这些影响铅芯延期精度的因素进行了分析.

Study on the Burning Characteristic of Delay Element with Lead Tube by High Speed Photography

The process from being ignited to spurting flames out of a lead delay element mounted in the transpatent plastic tube was photographed by high speed video camera. The image showed that the delay composition at ignition end was instantaneously burned together with the match head. A length of delay composition at terminal end was erupted and had no delay function. The lead delay dement after deflagration was split with a knife, and observed by a microscope, the residue in layer form was found son.where in the longitudinal direction. Based on the result, this paper analyzes the factors affecting the accuracy of delay time for lead delay element.