关键词: 矢量喷管;流体控制;喉道倾斜;调节

Abstract: The numerical simulation was applied to study the control method of two dimensional fluidic throat skewing vectoring nozzle. The results show that,when the throat section gas injection flow rate is unchanged, three typical states appear in the nozzle with the increase of the divergent section gas injection flow rate. When the flow rate of the divergent section gas injection is relatively small, the shape and position of sonic line in the nozzle throat have not been significantly changed,and a subsonic region appeares in the front of the divergent section gas injection. When the flow rate of the divergent section gas injection is relatively large, strong shock waves and large subsonic regions appear in the nozzle, with the maximum flow lost and the minimum thrust coefficient.With further increase for the flow rate of the divergent section gas injection, sonic line moves from the nozzle throat to a location between throat and divergent section gas injection which lead to the typical throat skewing. The flow coefficient can be controlled by keeping the divergent section gas injection flow rate unchanged and changing the throat section gas injection flow rate. The vector angle can be controlled by keeping the throat section gas injection flow rate unchanged and changing the divergent section gas injection flow rate.

Key words: Vectoring nozzle; Fluid control; Fluidic throat skewing; Adjust