应用气动谐振的气氧、煤油点火器的方案研究

为了实现液体推进剂火箭发动机的多次可靠起动,将气动谐振点火技术应用于气氧煤油的点火.提出了两种应用气动谐振的气氧煤油点火器方案:直接点火方案和间接点火方案.在直接点火方案中对气氧与煤油同轴喷入和煤油由顶部喷入两种不同的点火方式进行了分析比较.在间接点火方案中对点火火炬为富燃和富氧两种情况进行了对比分析.试验研究表明两种方案均实现了多次可靠的点火并生成了稳定的点火火炬.通过对两种方案的优缺点、工程上应用的技术可行性和存在的技术难点的分析,认为富燃情况的间接点火方案具有明显的优势并有望在短期内达到工程应用要求.

Investigation on methods of kerosene/oxygen ignition using gas dynamic resonance technique

In order to realize the multiple ignitions of liquid rocket engines reliably, gas dynamic resonance ignition was applied to ignite kerosene/oxygen. Two ignition methods of kerosene/oxygen igniter, direct ignition and indirect ignition, were discussed. For direct ignition method, the differences between the co axial injection of kerosene/oxygen and the top injection of kerosene were compared. For indirect ignition method, the condition of fuel rich ignition torch was studied in contrast with the condition of fuel lean ignition torch. According to the analysis of technical feasibility and difficulty, it can be concluded from experiments that both methods are valid for ignition, while indirect ignition method with fuel rich torch has more advantages and is prospective to realize in engineering application within a short term.