摘要
为研究当量比和射流压力对激波聚焦起爆性能的影响，以氢气和空气作为工质，在不同当量比和射流压力下对凹面腔中激波聚焦起爆爆震波的过程进行了数值模拟。结果表明，在产生稳定爆震的当量比范围内，激波聚焦的起爆性能随当量比的增大先提高，后降低，在当量比1．1时取得最佳值。射流压力的增大能提高激波聚焦的起爆性能，但提高程度呈下降趋势；它同时有助于扩大产生稳定爆震的当量比范围，计算表明在入口射流压力1．350、0．950、0．550MPa条件下产生稳定爆震的当量比分别为0．4～5．2、0．5～4．7、0．5～3．9。
To investigate the effects of equivalence ratio and jet pressure on the performance of detonation initiation via shock wave focus, numerical study was done on the detonation initiation under the conditions of different equivalence ratios and jet pressures of hydrogen-air mixture. The results show that in the range of equivalence ratio where detonation can be initiated, the performance of detonation initiation via shock wave focus first increases and then decreases with the increase of equivalence ratio. The optimum value is obtained at the equivalence ratio of 1.1. The performance of detonation initiation via shock wave focus is improved with the increase of jet pressure, but the increasing trend decreases gradually. The appropriate equivalence ratio range for stable detonation initiation could extend with the increase of jet pressure. The results also show that the range for stable detonation initiation were 0.4 - 5.2, 0.5 - 4.7 and 0.5 - 3.9 at the jet pressure of 1. 350, 0. 950 and 0. 550 MPa, respectively.
作者
陈鑫
谭胜
何立明
荣康
朱晓彬
郭鹏
CHEN Xin TAN Sheng HE Li-ming RONG Kang ZHU Xiao-bin GUO Peng(Aeronautics and Astronautics Engineering Institute of Air Force Engineering University, Xitan 710038, China Collaborative Innovation Center of Advanced Aero-Engine, Beijing 100191, China No. 95437 Unit, Nanchong 637100, China)
出处
《热科学与技术》
CAS
CSCD
北大核心
2016年第6期456-461,共6页
Journal of Thermal Science and Technology
基金
国家自然科学基金青年科学基金资助项目(51106178)
