Detonation and thrust augmentation airflow separated exhaust device

The invention belongs to the field of design of detonation turbine engines, and relates to a detonation and boosting airflow separated exhaust device which comprises an inner culvert spray pipe, an outer culvert spray pipe, an inner culvert adjusting device and an outer culvert adjusting device. When the detonation turbine engine works, high-temperature fuel gas in the afterburner enters the inner culvert spray pipe, high-temperature fuel gas in the detonation burner enters the high-temperature fuel gas channel, outer culvert cooling gas is divided into two strands and enters the first cooling channel and the second cooling channel respectively, and the wall faces of the outer culvert spray pipe and the inner culvert spray pipe are cooled. Meanwhile, outer culvert cooling gas in the first cooling channel and the second cooling channel enters the heat insulation cover, so that the inner culvert adjusting device does not make contact with high-temperature fuel gas generated by the detonation combustion chamber