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通过整机地面试验的方法,对喷管偏转后发动机不同工作状态下各参数的分析,获得了矢量偏转时发动机推力损失、偏转效率、发动机工作特性变化等数据.试验结果表明:在相同高压转速下,随着几何矢量角的增大,发动机的推力损失增大,偏转效率先增大后减小;在相同几何矢量角下,随着转速的增加,发动机推力损失经历由增大到减小的过程,矢量喷管的偏转效率增大,但偏转效率均小于1;节流状态时发动机转速差随着几何矢量角的增大而增大,中间状态时发动机转速差不受几何矢量角的影响;发动机节流状态时的矢量偏转使风扇工作线上移,风扇裕度减小,工程应用中需考虑扩稳措施.
Through the whole ground test, the parameters of the engine under different working conditions after nozzle deflection were analyzed, and the data of thrust loss, deflection efficiency and engine operating characteristics were obtained when the vector was deflected.The experimental results show that at the same high pressure speed , With the increase of geometric vector angle, the thrust loss of the engine increases and the deflection efficiency first increases and then decreases. Under the same geometric vector angle, with the increase of the rotational speed, the thrust loss of the engine increases from decreasing to increasing The deflection efficiency of the vector nozzle is increased, but the deflection efficiency is less than 1; when the throttle state is throttled, the engine speed difference increases with the increase of the geometric vector angle. In the intermediate state, the engine speed difference is not affected by the geometric vector angle Influence; When the engine throttling state of the vector deflection fan work line up, the fan margin is reduced, engineering applications need to consider the expansion measures.