火箭推进2026，Vol.52Issue(2)：22-30,9.DOI:10.3969/j.issn.1672-9374.2026.02.003
自燃推进剂内混式直流气液喷嘴的燃烧火焰特征分析
Analysis on flame characteristics of internal mixing gas-liquid injector with hypergolic propellant
摘要
Abstract
In order to investigate the gas-liquid flame characteristics of UDMH/NTO hypergolic propellant under sub/supercritical conditions,the internal mixing injector was chosen to stabilize the flame.The CH∗ chemiluminescence images of flame associated with different injectors and different conditions were obtained by high-speed ICCD camera.Flame gravity center(FGC)and proper orthogonal decomposition(POD)method were used to distinguish and describe the flame characteristics.The results show that there are three obvious stages during the ignition process.After the ignition pressure buildup is completed,the chamber pressure stabilizes,but the POD results suggest that there are several typical flame motions.Increasing the injecting angle between the liquid channel and gas channel of injector could promote the FGC to move upstream,however,the pronounced flame motions remain unchanged.In addition,comparing with the flame under the subcritical pressure,the flame associated with a supercritical pressure presents the feature of dense flow.关键词
常温推进剂/内混式直流喷嘴/气液燃烧/火焰自发光成像Key words
hypergolic propellant/internal mixing injector/gas-liquid combustion/flame self-illumination imaging分类
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杨瑶,雷博娟,孙毅,于涵,杨尚荣,严宇,杨宝娥..自燃推进剂内混式直流气液喷嘴的燃烧火焰特征分析[J].火箭推进,2026,52(2):22-30,9.基金项目
国家重点实验室基金(HTKJ2024KL011006) （HTKJ2024KL011006）
