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为了分析爆轰燃烧室几何尺寸对增压特性的影响,利用二维欧拉方程数值研究了当量H2/Air在连续旋转爆轰燃烧室中的燃烧流场情况。研究表明:在准稳定状态下爆轰燃烧流场特征参数随时间呈周期性振荡,且其振幅保持不变;横波及局部爆炸波的存在是爆轰波后侧附近总压沿x轴呈现波动变化的主要原因;影响连续旋转爆轰燃烧室增压特性的直接因素为斜激波的高度及爆轰波强度,减少轴向尺寸或增加周向尺寸可增强其增压特性。连续旋转爆轰燃烧室的增压比高达2.52,与传统的燃烧室相比,大大提高了燃气的做功能力。
In order to analyze the influence of detonation combustor geometry on supercharging characteristics, the numerical simulation of two-dimensional Eulerian equation was used to study the combustion flow field of equivalent H2 / Air in a continuous rotary detonation combustor. The results show that in the quasi-steady state, the characteristic parameters of the flow field in a detonation cycle oscillate cyclically with time, and its amplitude remains unchanged. The existence of shear wave and local explosion wave is that the total pressure near the rear side of the detonation wave fluctuates along the x-axis The main factors affecting the performance of the continuous rotary detonation combustor are the direct factors of the height of the shock wave and the intensity of the detonation wave. The reduction of the axial dimension or the increase of the circumferential dimension can enhance the supercharging characteristics. Continuously rotating detonation combustor supercharger ratio of up to 2.52, compared with the traditional combustion chamber, greatly improving the gas work capacity.