大流量异丁烷燃烧加热器高频不稳定燃烧抑制研究  

Study on the suppression of high-frequency unstable combustion in a high-flow isobutane combustion heater

作　　者：靳雨树 曾令国[1,2] 杨样 吕德润[1] 朱超 JIN Yushu;ZENG Lingguo;YANG Yang;LYU Derun;ZHU Chao(Hypervelocity Aerodynamics Institute,China Aerodynamics Research and Development Center,Mianyang 621000,China;National Key Laboratory of Aerospace Physics in Fluids,Mianyang 621000,China)

机构地区：[1]中国空气动力研究与发展中心超高速空气动力研究所,四川绵阳621000 [2]飞行器流体物理全国重点实验室,四川绵阳621000

出　　处：《火箭推进》2025年第1期137-145,共9页Journal of Rocket Propulsion

基　　金：中国空气动力研究与发展中心超高速空气动力研究所自主发展项目(KT-ZZFZ-2022-024)。

摘　　要：∅3 m高温风洞采用空气/液氧/异丁烷三组元燃烧加热方式运行,针对所用大流量异丁烷燃烧加热器出现的高频不稳定燃烧现象,分析了激发维持机理,提出了喷注器物理结构分区、燃烧流强分区等不稳定燃烧抑制方案,在典型状态下开展了试验验证。结果表明:采用基于物理结构分区的肋片隔板方案时,室压振荡由20%降至11%,结构振动小幅降低,不稳定燃烧抑制效果有限;采用基于物理结构分区和燃烧流强分区组合的隔板喷嘴方案时,室压振荡由20%降至4%,结构振动明显降低,不稳定燃烧抑制效果显著,在此基础上创新提出基于自有介质气膜冷却的隔板喷嘴方案,实现加热器典型试验状态下低燃烧脉动、低结构振动、300 s长时间安全稳定运行。The∅3 m high-temperature wind tunnel operates using a combustion heating method involving air,liquid oxygen,and isobutane tri-component.In response to the high-frequency unstable combustion phenomenon observed in the high-flow isobutane combustion heater used,an analysis of the excitation and maintenance mechanism was conducted,and unstable combustion suppression schemes were proposed,including physical structure zoning of the injector and combustion intensity zoning.Experimental verification was conducted under typical conditions.The results show that when using the fin baffle scheme based on physical structure zoning,the chamber pressure oscillation decreases from 20%to 11%,the structural vibration slightly decreases,and the unstable combustion suppression effect is limited.When using the nozzle baffle scheme based on a combination of physical structure zoning and combustion intensity zoning,the chamber pressure oscillation decreases from 20%to 4%,the structural vibration significantly decreases,and the unstable combustion suppression effect is significant.On the base of the nozzle baffle scheme,the self-owned air medium was used for film cooling,which can realize low combustion oscillation,low structural vibration and long-term safe and stable operation of the heater under typical test conditions.

关 键 词：异丁烷加热器 不稳定燃烧 隔板喷嘴 

分 类 号：V231.1[航空宇航科学与技术—航空宇航推进理论与工程]