当前位置: X-MOL 学术Acta Astronaut. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Experimental investigation of the ignition and combustion characteristics of electrically controlled solid propellant
Acta Astronautica ( IF 3.1 ) Pub Date : 2021-04-19 , DOI: 10.1016/j.actaastro.2021.04.012
Yang Li , Zhi-xun Xia , Jian-xin Hu , Li-kun Ma , Xu-dong Na , Zhi-cheng He

The ignition and combustion characteristics of electrically controlled solid propellant (ECSP) are investigated via high-speed photography, thermogravimetry, and differential scanning calorimetry with the application of an electrical voltage across electrodes imbedded in the ECSP. The effects of electrode polarity, electrode material, electrode surface roughness and electrode area on the ignition characteristics of ECSP were studied, and the response of ECSP to heat and electricity is studied separately. Experiments are performed to film the ignition process and the combustion flame and to measure the temperature distribution of the combustion wave. ECSP ignition and burning were localized to the electrode with small electrode surface area and to the interface between the electrode and the insulator when the area ratio was not 1:1. Furthermore, the electrode area ratio, electrode surface roughness, electrode material, and electrode polarity affect the ignition position. Under atmospheric conditions, the ECSP began and stopped with the application and removal of power and the preference of the ignition occurring the interface between the ECSP and the electrode coated insulation. Moreover, the current density distribution result matched well with the ignition and combustion experimental results. A clear “double-platform” phenomenon was observed in the temperature distribution of the combustion wave. The combustion flame of ECSP was determined to be the diffusion flame.



中文翻译:

电控固体推进剂着火和燃烧特性的实验研究

通过高速摄影,热重分析和差示扫描量热法,通过对嵌入ECSP的电极施加电压,研究了电控固体推进剂(ECSP)的着火和燃烧特性。研究了电极极性,电极材料,电极表面粗糙度和电极面积对ECSP点火特性的影响,并分别研究了ECSP对热和电的响应。进行实验以记录点火过程和燃烧火焰并测量燃烧波的温度分布。当面积比不为1:1时,ECSP着火和燃烧局限于电极表面积较小的电极以及电极与绝缘体之间的界面。此外,电极面积比,电极表面粗糙度,电极材料和电极极性会影响着火位置。在大气条件下,随着电源的施加和断开以及ECSP和电极涂层绝缘体之间的界面发生点火,ECSP开始和停止。此外,电流密度分布结果与点火和燃烧实验结果非常吻合。在燃烧波的温度分布中观察到明显的“双平台”现象。确定ECSP的燃烧火焰为扩散火焰。ECSP在通电和断电以及ECSP和电极涂层绝缘体之间的界面发生点火时开始和停止。此外,电流密度分布结果与点火和燃烧实验结果非常吻合。在燃烧波的温度分布中观察到明显的“双平台”现象。确定ECSP的燃烧火焰为扩散火焰。ECSP在通电和断电以及ECSP与电极涂层绝缘体之间的界面发生点火时开始和停止。此外,电流密度分布结果与点火和燃烧实验结果非常吻合。在燃烧波的温度分布中观察到明显的“双平台”现象。确定ECSP的燃烧火焰为扩散火焰。

更新日期:2021-04-21
down
wechat
bug