压力条件对旋转爆震发动机的影响

摘要

To further study performance of rotating detonation engine(RDE), a reduced kinetic mechanism based on 19-step reaction and 9 species for mixtures of 2H2 +02 +7N2 was used to simulate two-dimensional RDE, and transport processes such as thermal conduction,diffusion and viscosity were ignored. Effects of parameters such as inlet stagnation pressure P0 and back pressure Pl, on performance were studied. Results show that the pressure,temperature and height of detonation wave are affected primarily by inlet stagnation pressure, so are the parameters of outlet plan such as pressure,temperature and velocity. Specific impulse was influenced by ratio of ambient pressure to inlet stagnation pressure.%为进一步研究旋转爆震发动机的性能,采用9组分19步基元反应模型,忽略黏性、热传导和扩散等输运效应,对以2H2＋O2＋7N2为反应混合物的旋转爆震发动机进行二维模拟,研究入口总压p0和外界反压pb对发动机性能的影响.研究表明,爆震波压力、温度、高度以及出口平面参数（压力、温度、速度）主要受入口总压条件的影响;发动机比冲与压力比（外界反压与入口总压的比值）成反比.