连续旋转爆轰发动机流场三维数值模拟

Three-dimensional numerical simulation of continuous rotating detonation engine flowfields

对连续旋转爆轰发动机(continuous rotating detonation engine,简称CRDE)流场进行了三维数值模拟.数值计算获得同轴圆管腔内CRDE的多个爆轰循环过程.依据计算获得流场,分析了可燃气入射、提前燃烧、爆轰波结构等实现连续爆轰的几个关键机理问题.通过多个算例对不同来流总压时的旋转爆轰的推进性能进行了比较与分析,最后计算获得基于燃料的比冲约为2 200 s,燃料流量随总压变化呈线性增长.

A three-dimensional numerical simulation of continuous rotating detonation engine（CRDE）,which is particularly designed as a coaxial cylinders combustor,was carried out to reveal its physical nature.Numerical results of CRDE＇s multi-time cycle propagation process agree well with previous experiment qualitatively.Some key problems about CRDE,such as fuel injection,pre-combustion and detonation structure,were also discussed.At last,a propulsion performance analysis about CRDE was made based on a serial of simulation cases.Specific impulses of five different cases about 2200s were given by the present calculation based on the fuel.The mass flux increases linearly with the increase of injection pressure.