关键词: 兵器科学与技术, 气体与液体两相, 数值模拟, 连续旋转爆轰波, 流场结构, 推力性能

Abstract: A gas-liquid two-phase detonation model with chemical reaction is established in cylindrical coordinates based on the conservation element and solution element method, and the three-dimensional numerical simulation of continuously rotating detonation engine is performed to investigate the propagation characteristics of gas-liquid two-phase continuously rotating detonation wave. The flow field structure and stable propagation of detonation wave at initial formation stage were obtained through the calculation. Meanwhile, the variation of flow field in the radial direction and the thrust performance are analyzed, and the propagation characteristics of two-phase detonation wave are revealed. The simulated results show that the flow field structure in the combustion chamber is consistent with the experimental results in Ref.\[4\]. Because of the convergence of outer wall and the divergence of inner wall, the detonation strength increases along the radial direction of the combustion chamber. The self-sustaining rotating propagation of detonation wave is realized. When the injection pressure and injection temperature are 0.2 MPa and 288.15 K, respectively, and the fuel droplet radius is 25 μm, the average thrust of the gasoline and oxygen-enriched air continuously rotating detonation engine is about 880 N, and the propagation frequency of detonation wave is about 4 390 Hz. Key

Key words: ordnancescienceandtechnology, gas-liquidtwo-phase, numericalsimulation, continuouslyrotatingdetonationwave, flowfieldstructure, thrustperformance