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为了获得适用于微推进器的含硼燃料的改进配方,利用热重分析实验台、激光点火实验台和电感耦合等离子体发射光谱仪,进行了氧/燃比和草酸对含硼燃料在微小圆管中火焰形貌、点火延迟时间、燃烧时间、燃烧剧烈程度、燃速和燃烧效率等点火燃烧性能的影响研究。实验结果显示:无草酸的样品,氧/燃比越大,硼的点火延迟时间越小,燃尽率越高;但燃速和燃烧剧烈程度越小。添加草酸后,硼的点火性能和燃尽率明显提高,比添加草酸前的点火延迟时间减小了545~595ms,燃尽率增大了31.41%~32.67%。
In order to obtain an improved formulation of boron-containing fuel suitable for micro-thrusters, oxygen / fuel ratio and oxalic acid were tested on a thermogravimeter, a laser ignition bench and an inductively coupled plasma atomic emission spectrometer Flame morphology, ignition delay time, burning time, degree of combustion severity, burning rate and combustion efficiency of the ignition combustion research. The experimental results show that the sample with no oxalic acid has the higher oxygen / fuel ratio, the smaller the ignition delay time of boron, the higher the burnout rate, but the less burning rate and combustion severity. After adding oxalic acid, the ignition performance and burn-out rate of boron increased obviously, the ignition delay time decreased 545 ~ 595ms and burn-up rate increased 31.41% ~ 32.67% compared with that before adding oxalic acid.