The jet characteristics under various injection conditions were measured by the schlieren photograph, and the overall excessive air ratio of the jets were calculated.

• 通过纹影照片得到了不同喷射压力和背压下的射流贯穿距离、射流锥角和射流体积随时间变化的规律，计算得到了射流内整体过量空气系数随时间变化的规律。