航天推进技术研究院主办
Cheng Yufeng,Nie Wansheng,Feng Songjiang.The effect of initial LOX/GH2 liquid rocket hydrogen temperature on engine combustion lnstability[J].Journal of Rocket Propulsion,2009,35(01):27-30.
氢喷射温度对氢氧火箭发动机 燃烧稳定性的影响
- Title:
- The effect of initial LOX/GH2 liquid rocket hydrogen temperature on engine combustion lnstability
- 分类号:
- V434.1
- 文献标志码:
- A
- 摘要:
- 应用CFD方法对氢氧火箭发动机中高频燃烧不稳定性进行了数值模拟,研究分 析了不同工况条件下氢喷射温度对燃烧振荡的影响规律,得出了压力振荡频率变化规律及稳 定性极限图。结果表明:在一定的氢喷射温度范围内会发生不稳定燃烧,且随着混合比的增 大.发生不稳定燃烧的氢喷射温度上限增大;不稳定燃烧振荡主频呈倍频关系,且在氢喷射 温度(70 K~110 K)内。振荡主频最大。
- Abstract:
- The combustion instability in one LOX/GH2 liquid rocket engine was studied by USing CFD methods.The effects of initial hydrogen temperature on combustion oscillation at different operational conditions were studied,and the roles of instable pressure frequencies and the combus— tion stability limiting map are developed.Results show that combustion instability will happened at a specific initial hydrogen temperature bound and the upper limit of this initial hydrogen temperature bound will increases鹄the O/F increases.In addition.the instable dominant frequencies age present as multiple frequencies and have a maximum value at a hydrogen temperature bound from 70 K to 110 K.
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备注/Memo
收稿日期:2008—10—29;修回日期:2008—12—15。资助项目:国家自然科学基金(50576105)。 作者简介:程钰锋(1985一),男,硕士生,研究领域为火箭发动机喷雾燃烧过程。