摘要
在固定来流条件下,改变旋转爆轰燃烧室宽度和出口阻塞比,实验研究上述结构对煤油预燃裂解气与空气旋转爆轰传播特性的影响。实验结果表明:适宜的燃烧室宽度和出口宽度能够促进旋转爆轰波(Rotating Detonation Wave,RDW)的稳定自持传播,当燃烧室宽度为20 mm和26 mm,燃烧室出口宽度为4~8 mm时,煤油预燃裂解气和空气能够成功起爆并能稳定传播,增加燃烧室的宽度,RDW传播速度和稳定性均有提升;随着出口阻塞比增加,RDW传播模态经历了稳定单波模态、间断单波模态和双波同向模态,阻塞比的增加能提升燃烧室末端反射激波的强度,促进多波头的产生,RDW传播速度和压力随着阻塞比的增加,经历了升高后降低的变化。
The width and outlet blockage ratio of rotating detonation combustion chamber are changed under the condition of fixed incoming flow.The effect of combustor configuration on the rotating detonation characteristics of kerosene pre-combustion cracking gas and air was experimentally investigated.The experimental results show that suitable combustor width and outlet width can promote stable self-sustaining propagation of rotating detonation wave(RDW).When the width of combustor is 20 mm or 26 mm and the width of combustor outlet is 4~8 mm,the kerosene pre-combustion cracking gas and air can be successfully detonated and can propagate stably.The propagation velocity and stability of RDW are improved by increasing the width of combustor.With the increase in outlet blockage ratio,the RDW propagation mode experiences stable single rotating detonation wave(SRDW)mode,intermittent single rotating detonation wave(ISRDW)mode and two-co rotating detonation waves(TCORDW)mode.The blockage ratio can be increased to improve the intensity of reflected shock wave at the end of combustor and promote the generation of multiple wave heads.RDW propagation velocity and pressure increase first and then decrease with the increase in blockage ratio.
作者
韩家祥
白桥栋
邱晗
郑权
翁春生
Gas HAN Jiaxiang;BAI Qiaodong;QIU Han;ZHENG Quan;WENG Chunsheng(National Key Laboratory of Transient Physics,Nanjing University of Science and Technology,Nanjing 210094,Jiangsu,China)
出处
《兵工学报》
EI
CAS
CSCD
北大核心
2024年第8期2837-2850,共14页
Acta Armamentarii
基金
国家自然科学基金项目(12272185)。
关键词
煤油预燃裂解气
旋转爆轰
燃烧室结构
传播模态
kerosene pre-combustion cracking gas
rotating detonation
combustor configuration
propagation mode
作者简介
通信作者:白桥栋,邮箱:baiqd@njust.edu.cn。
