An aerodynamic valve with blunt block and backflow damping orifices was designed for pulse detonation engines(PDEs)

and its mechanism was analyzed.The flow field in the aero-valve and the flow drag character were examined numerically.The result shows that the valve presents good single-direction flow performance.The flow is found moving smoothly to the detonation chamber when the pressure at the valve inlet is between100 kPa and 500 kPa.However the drag rises linearly along with the increase of the inlet pressure when the flow direction is reversed.The simulation results in detonation environment show that

the single-direction flow performance

the mixing quality and the exit flow field uniformity of the aerodynamic valve will be enhanced greatly

and the backflow drag rises dramatically.