气氧/煤油同轴离心式喷嘴燃烧特性实验研究  

Experimental investigation on combustion characteristics of GO x/kerosene swirl coaxial injectors

作　　者：尚帅 陈鸿麟 于涵 张锋 严宇 连俊恺 SHANG Shuai;CHEN Honglin;YU Han;ZHANG Feng;YAN Yu;LIAN Junkai;YANG Baoe(National Key Laboratory of Aerospace Liquid Propulsion,Xi'an Aerospace Propulsion Institute,Xi'an 710100,China;Academy of Aerospace Propulsion Technology,Xi'an 710100,China)

机构地区：[1]西安航天动力研究所航天液体动力全国重点实验室,陕西西安710100 [2]航天推进技术研究院,陕西西安710100

出　　处：《火箭推进》2025年第1期119-127,共9页Journal of Rocket Propulsion

基　　金：全国重点实验室基金(6142704200102)。

摘　　要：为了研究气氧/煤油同轴离心式喷嘴的燃烧特性,进行了不同缩进长度和氧喷嘴长度喷嘴的单喷嘴燃烧实验,实验中氧化剂为氧气,从中心喷注,燃料为煤油,从离心喷嘴喷注。实验结果表明:当煤油或氧气喷注压降较低时,燃烧室内会产生低频压力振荡。该振荡是由燃烧中间过程所诱发,燃烧室压力脉动与供应系统的流体压力脉动耦合所形成的,通过提高喷注压降可以抑制该低频振荡;缩进长度的变化会对喷嘴的振荡特性产生重要影响,在缩进比0.32~1.07范围内,存在中间某值使得燃烧较不稳定;氧喷嘴长度的变化对喷嘴的低频振荡无明显影响。To explore the combustion characteristics of oxygen/kerosene swirl coaxial injectors,the combustion experiments were carried out with injectors of different recess lengths and oxygen injector lengths.In the experiment,the single-coaxial swirl injectors have been used to inject liquid kerosene and GO x.The experimental results indicate that when the injection pressure drop of kerosene or GO x is low,the chamber pressure oscillates at a low frequency.The oscillation is induced by the combustion process,and is formed by the coupling of pressure oscillation in the combustion chamber and fluid pressure pulsation in the feed system.By increasing the injection pressure drop,this low-frequency oscillation can be suppressed.The change in indentation length will have a significant impact on the oscillation characteristics of the injector.Within the recess ratio range of 0.32-1.07,there is a certain middle value that makes combustion more unstable.The variation in the length of the oxygen injector has no significant effect on the low-frequency oscillation of the injectors.

关 键 词：气氧/煤油 同轴离心喷嘴 燃烧特性 低频振荡 

分 类 号：V434[航空宇航科学与技术—航空宇航推进理论与工程]