针对旋转爆震盘式和空筒燃烧室可能存在新鲜混气填充不均匀影响爆震波传播的问题，开展新鲜混气填充不均匀对爆震波传播特性的影响研究。在二维径向膨胀通道内，固定虚拟内壁面半径为65 mm、径向高度为15 mm，改变填充不完全距离、初始压力、稀释比和残留燃烧产物温度，对爆震波的传播过程开展研究。考虑轴向膨胀与径向膨胀的耦合影响，在三维计算域内，改变新鲜混气轴向填充高度，对双侧膨胀影响下的爆震波传播特性开展研究。结果表明，对于二维通道内仅发生径向膨胀的爆震波，依据速度亏损程度和爆震波是否退化为缓燃波，将爆震波传播模态划分为稳定模态、弱不稳定模态、强不稳定模态和缓燃模态。随残留燃烧产物的温度增加，其相对于新鲜混气的声阻抗比下降，燃烧产物区内的斜激波沿传播方向领先于爆震波。一方面，领先的斜激波后方压力升高，直接抑制了径向膨胀作用对爆震波造成的亏损；另一方面，当斜激波与爆震波锋面满足马赫反射条件时，发生马赫反射，形成马赫杆，构成稳定的波系结构，进一步促进了爆震波的稳定自持传播。填充不完全距离和平均胞格尺寸揭示了爆震波稳定模态、弱不稳定模态、强不稳定模态和缓燃模态的临界转变条件。当爆震波同时发生径向膨胀和轴向膨胀时，定义了最大压力线性衰减系数衡量爆震波在轴向对压力亏损的敏感度，随轴向填充高度的增加或径向位置越靠近外壁面，最大压力线性衰减系数呈下降趋势，表明爆震波抵御轴向侧向膨胀的能力增强。

Numerical study is carried out to investigate the impact of the non-uniform filling of the fresh mixture on the detonation wave propagating in the disk-shape and hollow rotating detonation combustor. The propagation characteristics in the two-dimensional curved channel with lateral expansion on the inner side are analyzed by fixing the virtual inner wall radius at 65 mm and radial height at 15 mm while varying the incomplete filling distance， initial pressure， dilution ratio and temperature of combustion products. Considering the coupled effects of axial and radial expansions， simulations are also conducted in the three-dimensional channel by varying the axial filling height of the fresh mixture. In the two-dimensional channel where only the lateral expansion effect exists， four propagating modes are observed， i.e.， stable mode， weakly unstable mode， strongly unstable mode， and deflagration mode， based on the velocity deficit and whether the detonation wave degenerates into a deflagration wave. As the temperature of the residual combustion products increases， the acoustic impedance ratio between the residual combustion products and the fresh mixture decreases， causing the oblique shock within the combustion products region to advance ahead of the detonation wave along the propagation direction. On the one hand， the pressure rise behind the oblique shock directly suppresses the detonation deficit induced by radial expansion. On the other hand， when the interaction between the oblique shock and the detonation front satisfies the Mach reflection condition， the formation of a Mach stem results in a stable wave system， can further promote the stable self-sustained propagation of the detonation wave. Critical criteria for mode transition among the stable mode， the weakly unstable mode， the highly unstable mode， and the deflagration mode have been established in terms of the incomplete filling distance and the average cell size. In the three-dimensional condition where the detonation wave undergoes the radial and axial expansion simultaneously， a linear decay coefficient of the maximum pressure is defined to quantify the sensitivity of the detonation wave to pressure loss in the axial direction. As the axial filling height increases or the radial position approaches the outer wall， the linear decay coefficient of the maximum pressure exhibits a decreasing trend， indicating an increased resistance to the inward development of pressure loss and an enhanced ability of the detonation wave to endure lateral expansion.