  A three-dimensional simulation of the rotating detonation engine (RDE) with
film cooling is conducted. The aim of this study is to analyze the fluid
dynamics and heat transfer of the detonation flow field under the influence of
cooling flow from the film holes. Results suggest that when the rotating
detonation wave sweeps the film holes, the shape of the wave structure will
deform, and the detonation products will invade and block the outflow from the
film holes; however, this only occurs temporarily. The structure of the
detonation wave will quickly restore to its stable form and, meanwhile, the
cooling flow also recovers rapidly and provides adequate protected area on the
wall surface and effective thermal protection time in a full propagation cycle
of the detonation wave. A parametric analysis indicates that the effective
outflow time improves with the increase of the mass flow rate of the cooling
flow; on the other hand, the cooling efficiency is more significant downstream
from the inlet of the combustor to the outlet. In addition, the thrust and
specific impulse of the RDE are also examined under the influence of film
cooling.
