为揭示径向流内燃波转子预压缩过程的非定常流动特性，通过三维非定常仿真对典型工况下复杂波系诱导预增压机制进行了模拟和分析，重点研究了进排气端口压差与波转子转速对通道内压缩波传播规律的影响。结果表明：压缩波在通道内传播时受弯曲通道曲率影响，导致波的反射、折射和衰减，发生能量损失和波形畸变，影响压缩波的传播路径与速度；高压差虽然增强了压缩波强度，但加剧了燃料的过度填充和流动不稳定性，增加了热力学损失，使等熵压缩效率显著降低；转速通过调节波转子的工作时序来影响通道内压缩波的传播特性，在1 200 r/min时，进气端口开启时间延长，压缩波反射形成膨胀波并逆向传播，导致通道内增压比仅为103%，等熵压缩效率大幅度减小。

In order to reveal the unsteady flow characteristics during the pre-compression process of the radial wave rotor combustor, the pre-compression mechanism induced by complex wave systems under typical operating conditions was simulated and analyzed using three-dimensional unsteady simulations. The impact of pressure differential across intake and exhaust ports, as well as rotor speed, on the propagation behavior of compression waves within the channels was focused on. The results indicate that as compression waves propagate within the channels, they are influenced by the curvature of the curved channels, leading to wave reflection, refraction, and attenuation. This results in energy loss and waveform distortion, which affect the propagation path and speed of the compression waves. Although a higher pressure difference enhances the intensity of the compression waves, it exacerbates overfilling of the fuel and flow instability, increases thermodynamic losses, and significantly reduces the isentropic compression efficiency. The rotational speed affects the propagation characteristics of compression waves within the channels by adjusting the operational timing of the wave rotor. At 1 200 r/min, the opening time of the intake port is extended, causing the compression waves to reflect and form expansion waves that propagate in the reverse direction. This results in a pressure ratio within the channel of only 103% and a substantial decrease in isentropic compression efficiency.