摘要
在空桶燃烧室中开展了不同流量下(142.7~493.9 g/s)的连续旋转爆震试验。流量为493.9 g/s时,爆震波的传播速度接近Chapman-Jouguet(CJ)理论参考值。随着流量的减小,爆震波的传播速度和压力逐渐降低。当流量降至142.7 g/s,爆震波演化为双波模态,并伴有熄灭-再起爆现象。而且,爆震波的压力和速度周期性波动,平均传播速度仅为76.8%的CJ爆震速度。随后,采用非线性时间序列分析法讨论了不同工况下爆震波的稳定性。结果表明:流量大于300 g/s时,燃烧室的高频压力序列在相空间中的吸引子收敛为极限环模式。减小流量后导致吸引子趋于混乱,表明爆震传播稳定性降低,系统趋于无序状态。该研究讨论了流量对爆震波稳定性的影响,并探索了非线性时间序列分析在旋转爆震稳定性研究中的应用,为复杂工况下爆震波稳定性判断提供了方法参考。
Rotating detonation experiments were conducted with various mass flow(i.e.,142.7−493.9 g/s)in a hollow combustor.The propagation velocity of the detonation wave was close to the Chapman-Jouguet(CJ)detonation speed when the mass flow reached 493.9 g/s.With the decrease of mass flow,the velocity and pressure of the detonation waves decreased.When it dropped to 142.7 g/s,the detonation waves evolved into a two-wave mode,accompanied by extinction and re-initiation phenomenon.Moreover,the pressure and velocity of the detonation waves fluctuated periodically,and the average propagation velocity was only 76.8%of CJ detonation velocity.Further,the nonlinear time-series analysis was adopted to reveal the stabilities of detonation waves.Results showed that when the mass flow was greater than 300 g/s,the attractor of the pressure time series in the phase space converged to the limit cycle mode.Decreasing the flow led to the disorder of the attractor.It indicated that the stability of the detonation wave decreased,and the system was prone to disorder.This study proved the effectiveness of nonlinear time-series analysis in studying the stabilities of rotating detonation,providing a methodological reference for the judgment of detonation wave stability under complex working conditions.
作者
范良忠
郭康康
舒晨
陈朋
聂万胜
林伟
FAN Liangzhong;GUO Kangkang;SHU Chen;CHEN Peng;NIE Wansheng;LIN Wei(Department of Aerospace Science and Technology,Space Engineering University,Beijing 101416,China)
出处
《航空动力学报》
EI
CAS
CSCD
北大核心
2023年第5期1090-1101,共12页
Journal of Aerospace Power
基金
国家自然科学基金(11902361,51876219)。
关键词
空桶燃烧室
旋转爆震
传播稳定性
非线性时间序列
相空间重构
hollow combustor
rotating detonation
propagation stability
nonlinear time series analysis
phase space reconstruction
作者简介
范良忠(1996−),男,硕士生,研究领域为连续旋转爆震发动机、液体火箭发动机燃烧不稳定;通信作者:林伟(1987−)男,副教授、硕士生导师,博士,研究领域为爆震发动机技术、空间推进技术。E-mail:linweiqy@163.com。
