弹道学报2025，Vol.37Issue(1)：9-19,53,12.DOI:10.12115/ddxb.2023.10011
当量比对富氢燃气旋转爆轰自起爆传播特性的影响
Effect of Equivalent Ratio on Auto-initiation Propagation Characteristics of Rotating Detonation of Hydrogen-rich Gas
摘要
Abstract
In order to deeply study the auto-initiation phenomenon of rotating detonation of high-temperature hydrogen-rich gas,the experimental study was carried out.The influence of equivalent ratio on the propagation characteristics of high-temperature hydrogen-rich gas rotational-detonation-wave was explored by analyzing the typical characteristic-parameters,and the equivalence-ratio range of the successful auto-initiation of high-temperature hydrogen-rich gas to form a rotational detonation wave was obtained,and the influence of equivalence ratio on the self-initiation delay time was analyzed.The results show that the intensity of the initial rotational detonation wave formed by auto-initiation is weak,and the propagation direction and propagation mode will change.However,through the self-adjustment of the rotational detonation,the stable self-sustaining propagation of the rotational detonation can be realized finally.While the flow rate of pre-fired oxygen is about 8 g/s and the air flow-rate is 270 g/s,within the equivalence-ratio range of 0.85-1.98,the high-temperature hydrogen-rich gas can form a stable rotational detonation wave through self-detonation.When the equivalence ratio is greater than 1.52,the rotational detonation wave is in a single-wave mode,and with the decrease of the equivalence ratio,it changes to a mixed mode,that is,under the same working condition,the single-wave,dual-wave mode and single/double-wave transition mode appear irregularly alternately.When the equivalence-ratio decreases to about 0.96,the rotational detonation wave presents a stable two-wave mode,and with the increase of the equivalence ratio,the auto-initiation delay time decreases from 138 ms to 106 ms.The propagation velocity of the rotational detonation wave increases first and then decreases with the increase of the equivalence ratio.The maximum value of the wave velocity occurs when the equivalence ratio is 1.33,and the wave velocity is 1 278 m/s.关键词
高温富氢燃气/旋转爆轰/自起爆过程/传播模态/当量比Key words
high-temperature hydrogen-rich gas/rotating detonation/auto-initiation/propagation characteristics/equivalence ratio分类
武器工业引用本文复制引用
高文佳,白桥栋,韩家祥,邱晗,刘嘱勇,翁春生..当量比对富氢燃气旋转爆轰自起爆传播特性的影响[J].弹道学报,2025,37(1):9-19,53,12.基金项目
国防预研基金项目 （）
