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为了研究气体与液体两相连续旋转爆轰波的传播特性,基于三维守恒元和求解元方法,在圆柱坐标系下采用带化学反应的气体与液体两相爆轰模型,对连续旋转爆轰发动机进行三维数值模拟。通过计算获得了爆轰波起爆及其稳定传播时的流场结构,分析了流场在燃烧室径向方向的变化以及发动机的推力性能,揭示了两相爆轰波的传播特性。研究结果表明:燃烧室内流场结构与文献[4]中的实验研究结果定性一致;由于环形燃烧室外壁面的收敛和内壁面的发散,爆轰强度沿着燃烧室的径向方向逐渐增强,实现了爆轰波的自持旋转传播;以汽油为燃料、富氧空气为氧化剂,在填充总压为0.2 MPa、总温为288.15 K、燃料液滴半径为25μm的条件下,连续旋转爆轰发动机所获得的平均推力约为880 N,爆轰波的传播频率约为4 390 Hz.
In order to study the propagation characteristics of two-phase continuous detonation waves with gas and liquid, based on the three-dimensional conservation element and the solution element method, a two-phase gas and liquid detonation model with chemical reaction was adopted in the cylindrical coordinate system, Three-dimensional numerical simulation. The structure of the flow field during detonation initiation and its steady propagation is obtained. The variation of the flow field in the radial direction of the combustion chamber and the thrust performance of the engine are analyzed. The propagation characteristics of the two-phase detonation wave are revealed. The results show that the structure of the flow field in the combustion chamber is qualitatively consistent with the experimental results in Ref. [4]. Due to the convergence of the outer wall surface of the annular combustion chamber and the divergence of the inner wall surface, the detonation strength gradually increases along the radial direction of the combustion chamber. The self-sustaining rotation propagation of detonation wave was carried out. With gasoline as fuel and oxygen-enriched air as oxidant, under the conditions of a total pressure of 0.2 MPa, a total temperature of 288.15 K and a fuel droplet radius of 25 μm, The average thrust obtained was about 880 N and the detonation wave was transmitted at a frequency of about 4 390 Hz.