塞式矢量喷管热态内流特性试验

Experiment on Hot Internal Flow Characteristics of Plug Vectoring Nozzle

为了获取塞式矢量喷管的几何偏转角(0°、10°、15°)和落压比(2~6)对喷管的总压恢复系数、推力系数和气动矢量角的影响规律,开展了塞式矢量喷管热态内流特性试验研究。试验结果表明:在非偏转及偏转状态下,塞式喷管的总压恢复系数均高于0.99,表明喷管具有良好的内流特性;塞式喷管在低的可用压比情况下仍具有较高的推力系数,验证了塞式喷管在较低的可用压比情况下仍具有较高的推力系数;在几何偏转角固定时,气动偏航角基本稳定;在几何偏转角为15°时,气动矢量角最大可达15.5°,即喷管气动偏转角度与几何偏转角度相匹配,二者呈正比关系。

In order to obtain the effects of different geometric deflection angles(0°,10°,15°)and nozzle pressure ratios(2-6)on the total pressure recovery coefficient,thrust coefficient and aerodynamic vector angle of the plug vectoring nozzle,the experimental study of the hot internal flow characteristics of the plug vectoring nozzle were carried out.The experimental results show that the total pressure recovery coefficient of the plug nozzle is higher than 0.99 under the condition of non deflection and deflection,which indicates that the nozzle has good internal flow characteristics.The plug nozzle still has high thrust coefficient at low available pressure ratio,which verifies that the plug nozzle still has high thrust coefficient at low available pressure ratio.When the geometric deflection angle is fixed,the aerodynamic yaw angle is basically stable.The maximum aerodynamic vector angle can reach 15.5°when the geometric deflection angle is15°,that is to say,the aerodynamic deflection angle of nozzle matches the geometric deflection angle,and the both are proportional to each other.