Numerical Simulation on Disk Rotating Detonation Engine: Influence of Internal Flow Field Structure on Performance

摘要

Three-dimensional simulation for hydrogen-oxygen mixtures on Disk Rotating Detonation Engine (DRDE) are performed in order to understand the flowfields inside the DRDE. The propagation patterns of the detonation are visualized for various conditions such as the stagnation pressure, the number of detonation fronts, and the injection system. The numerical results show that the detonation velocity is larger than the C-J velocity for all conditions. The flow angle into the turbine location is approximately 50 degrees against the radial direction. Furthermore, this angle and the inflow velocity are independent of the stagnation pressure. In the case of two-wave detonation, it is found that the two-wave system merges into the one-wave system. The characteristics of the flow field in this study can be applied to the design of the radial turbines in future experiments and simulations.