CAJ | 학술논문

建立爆轰管道研究不同初始压力下爆轰波在管道内传播规律。选用 CH4+2O2气体，采用光纤探针测量爆轰波在管道内的传播速度，采用烟迹法记录爆轰波胞格结构。结果表明：爆轰波在管道内传播时出现5种不同传播模式，分别为稳态式、快速波动式、结巴式、驰振式与失效模式。在稳态传播模式下，爆轰波局部速度波动很小且平均速度接近理论爆轰 CJ 速度，并呈现多头胞格结构。随着初始压力的降低，爆轰波局部速度波动增加且其平均速度产生衰减。在驰振式爆轰解耦处，爆轰波胞格结构消失，过载爆轰时，重新形成胞格结构。进一步降低初始压力至爆轰失效时，则无胞格结构。
건립폭굉관도연구불동초시압력하폭굉파재관도내전파규률。선용 CH4+2O2기체，채용광섬탐침측량폭굉파재관도내적전파속도，채용연적법기록폭굉파포격결구。결과표명：폭굉파재관도내전파시출현5충불동전파모식，분별위은태식、쾌속파동식、결파식、치진식여실효모식。재은태전파모식하，폭굉파국부속도파동흔소차평균속도접근이론폭굉 CJ 속도，병정현다두포격결구。수착초시압력적강저，폭굉파국부속도파동증가차기평균속도산생쇠감。재치진식폭굉해우처，폭굉파포격결구소실，과재폭굉시，중신형성포격결구。진일보강저초시압력지폭굉실효시，칙무포격결구。
Detonation tube was built to investigate the effect of initial pressure on the propagation of detonation wave in round tube.The premixed gas of CH4+2O2 was selected as experimental gas. Optical fiber probe was used to measure the local velocity of detonation wave.Smoked foils were used to register the cellular structure of detonation wave in tubes.The experimental results show that there are five distinct modes during the propagation of detonation wave in tubes,which are stable mode,rapid fluctuation mode,stuttering mode,galloping mode and failure mode.Under the mode of stable detonation,the fluctuations of the local velocity of detonation wave are generally small and the averaged velocity of detonation wave is close to the theoretical CJ value.The detonation wave has multi-headed cellular structure.With decreasing of the initial pressure,the fluctuations of the local velocity of detonation wave increase,and the averaged velocity of detonation wave decreases.For the galloping detonation,at the decoupled position,cellular structure disappears.Cellular structure forms again when overdriven detonation occurs.If the initial pressure is further decreased till the detonation failure,no cellular structure is observed.