CAJ | 학술논문

为了掌握爆震频率对两相多循环爆震波起爆特性的影响规律,对采用高能火花塞点火的吸气式脉冲爆震发动机不同爆震频率下的起爆过程进行了试验研究,对比分析了不同频率下的P DE沿程压力分布,讨论了起爆特征参数,如DDT转变距离、着火延迟时间、DDT转变时间和起爆时间等,与爆震频率的变化关系. 试验结果显示,随着工作频率增加,爆燃燃烧向爆震燃烧的转变有所加快. 工作频率对着火延迟时间和爆震形成时间影响较大,对DDT时间影响很小,随着频率增加,着火延迟时间和爆震形成时间逐渐减小,而DDT时间略有下降.
위료장악폭진빈솔대량상다순배폭진파기폭특성적영향규률,대채용고능화화새점화적흡기식맥충폭진발동궤불동폭진빈솔하적기폭과정진행료시험연구,대비분석료불동빈솔하적P DE연정압력분포,토론료기폭특정삼수,여DDT전변거리、착화연지시간、DDT전변시간화기폭시간등,여폭진빈솔적변화관계. 시험결과현시,수착공작빈솔증가,폭연연소향폭진연소적전변유소가쾌. 공작빈솔대착화연지시간화폭진형성시간영향교대,대DDT시간영향흔소,수착빈솔증가,착화연지시간화폭진형성시간축점감소,이DDT시간략유하강.
In order to grasp the influence of detonation frequency on the initiation characteristics of two?phase multi?cycle detonation, an air?breathing pulse detonation engine mockup with high energy spark plug was designed and the experiments of detonation initiation process at different operating frequencies were carried out. The pressure dis?tributions along the length of PDE mockup at different operating frequencies were contrasted and analyzed. Mean?while , the relationship between the detonation frequency on the one hand and the initiation characteristic parameters on the other hand was discussed, such as the DDT transition distance, ignition delay time, DDT transition time and detonation initiation time and so on. The experimental results indicated that deflagration to detonation transition in?creased with increasing operating frequency. The operating frequency had obvious effect on ignition delay time and the detonation initiation time but had a weak effect on DDT time. As the operating frequency increased, the ignition delay time and detonation initiation time decreased linearly, while the DDT time declined slightly.