CAJ | 학술논문

空气节流可以有效地实现超燃冲压发动机燃烧室燃料的稳定燃烧，采用非定常数值模拟和地面试验研究了空气节流作用下乙烯燃料超燃冲压发动机的流场特性。结果表明：在燃烧室入口马赫数2、静温530K，静压0.1MPa，845mm处节流条件下，冷流流场达到稳定所需时间较短，约为2ms；在空气节流开始后的6ms注入燃料实现发动机的起动点火是合适的；28ms后燃烧流场稳定，流场呈现短周期的小幅振荡，周期约为0.86ms，振荡对流场的影响很小；壁面压力数据的数值模拟结果与试验结果匹配良好，数值模拟更加全面地给出了流场结构信息。
공기절류가이유효지실현초연충압발동궤연소실연료적은정연소，채용비정상수치모의화지면시험연구료공기절류작용하을희연료초연충압발동궤적류장특성。결과표명：재연소실입구마혁수2、정온530K，정압0.1MPa，845mm처절류조건하，랭류류장체도은정소수시간교단，약위2ms；재공기절류개시후적6ms주입연료실현발동궤적기동점화시합괄적；28ms후연소류장은정，류장정현단주기적소폭진탕，주기약위0.86ms，진탕대류장적영향흔소；벽면압력수거적수치모의결과여시험결과필배량호，수치모의경가전면지급출료류장결구신식。
Air throttling is an effective method to facilitate flame stabilization. Flow structure in an ethylene-fueled scramjet combustor is studied by solving unsteady N-S equations and experiment. Results show that under the inflow air condition Mach number 2.0,static temperature 530K,static pressure 0.1MPa,location of air throt?tling being 845mm from the entrance of the combustor,the cold flow field achieves stability. It is suitable for fuel injected into the scramjet at 6ms and the hot flow is steady at 28ms after air throttling starts. The flow field pres?ents small cyclical oscillation,which has a small effect on the flow field with the cycle time 0.86ms. The calculat?ing data of wall pressure match the experiment data well,and the flow structure is illustrated comprehensively with numerical methods.