Numerical investigation of thermodynamic performance on continuous detonation engines

在二维圆柱腔中连续爆轰发动机数值模拟的基础上,对喷入流场中的粒子进行跟踪,得到经历不同燃烧过程的粒子轨迹图.分析影响粒子轨迹及其上物理参量变化的主要因素.数值模拟得到相应的示功图和示热图,计算连续爆轰发动机的机械功及热效率,将数值模拟结果与理想ZND（Zeldovich-Neumann-Do-ring）模型进行定性和定量的比较,所得数值模拟结果与理论结果符合得很好,验证了连续爆轰发动机的优势.Based on the two-dimensional （2-D） numerical simulation of continuous deto- nation engine in an annular chamber, the paths of fluid particles starting at the injection plate were tracked, and their thermodynamic condition was plotted on a p-v and T-s dia- gram. The main factors that affect the paths and the fluctuation of physical parameters were discussed in detail. The thermodynamic cycle efficiency and net work output were obtained from the diagrams. The numerical thermodynamic cycle diagrams show very similar struc- ture to the ideal ZND （Zeldovich-Neumann-Doring） model. The superior performance of CDE （continuous detonation engine） is further defined.航空科学基金项目; 国家自然科学基金中文核心期刊要目总览(PKU)中国科技核心期刊(ISTIC)中国科学引文数据库(CSCD)0116-242