富氧环境模拟绝热层烧蚀试验方法

发展了一种能模拟固体火箭冲压发动机补燃室富氧环境并用于绝热层烧蚀研究的试验方法。用常规燃气发生器产生的燃气,与补进的氧气(氮气)、空气混合,通过控制流量,模拟固冲发动机补燃室内的压强、流量、燃气温度和富氧度等参数。组建了试验系统,对燃气参数进行了校测,并开展了4种绝热材料在富氧环境下的烧蚀试验。结果表明,该系统能够模拟富氧烧蚀环境,可利用该试验方法开展富氧环境下绝热层配方筛选和烧蚀机理研究。

A simulation experimental method for insulation ablation under oxygen-rich condition

An experimental method for simulating oxygen-rich condition in afterburning chamber of solid ducted rocket(SDR) was developed for insulation ablation investigation.Gas produced by conventional gas generator,air and oxygen(nitrogen) were mixed,and some parameters including pressure,flow,temperature and oxygen-rich degree in afterburning chamber were adjusted by controlling flow.An experimental system was established,and the main parameters of gas were checked.Four kinds of insulations were tested under oxygen-rich condition.The results show that the experimental system can be used for simulation of oxygen-rich condition,so that selection of insulation formula and ablation mechanism investigation can be carried out.