摘要
采用新的氢气/空气总包化学反应模型,对二维圆柱连续爆轰流场的演化进行数值模拟,计算了当量比φ从0.4到2.0变化时对连续旋转爆轰的影响。计算结果表明:在此物理模型和初始条件下,当φ为0.4、0.6、0.8、1.8、2.0时不能形成连续旋转爆轰,当φ为1.0、1.2、1.4、1.6时能够形成稳定的连续旋转爆轰,这一结果与实验结果符合得很好;贫燃和富燃条件下不能形成连续旋转爆轰的机理是不同的。
A newly-developed global chemical reaction model for H2/air is employed to numerically simulate the evolution of continuously rotating detonation flow field in 2-dimensional cylindrical coordinates,which aims to investigate the influence of varying equivalence ratios on the rotating detonation engine. The equivalence ratio φ varies from 0. 4 to 2. 0. The calculated results show that the stable continuously rotating detonating waves( CRDWs) can not be generated for φ = 0. 4,0. 6,0. 8,1. 8,and2. 0,but the stable CRDWs can be generated in the combustion chamber for φ = 1. 0,1. 2,1. 4,and1. 6. The simulated results are good agreement with the experimental results. Moreover,the mechanisms that generate no CRDWs in the fuel-rich and fuel-lean conditions are different.
出处
《兵工学报》
EI
CAS
CSCD
北大核心
2017年第S1期1-7,共7页
Acta Armamentarii
基金
国家自然科学基金重大计划项目(91441110)
关键词
兵器科学与技术
爆轰物理
连续旋转爆轰
当量比
总包化学反应模型
ordnance science and technology
detonation physics
continuously rotating detonation
equivalence ratio
global chemical reaction model
