Abstract: For short take off and vertical landing aircraft(STOVL)dynamic taking off process with lift loss， Reynolds-averaged turbulence k-ε model is employed to calculate STOVL aircraft flow field. Curve of dynamicsuckdown is acquired. The lift plate wall pressure is influenced by the formation and movement of the main vor.tex. The slope of suckdown curve increases at dimensionless impinging height lower than three，and suckdown is also augment. Suckdown in dynamic process is greater than steady status，at dimensionless height 1.5，nearly 26% difference. The flow field response delay is the cause of the difference.

Key words: Short take off vertical landing(STOVL)； Impinging jet；Dynamic process；Lift loss；Nu. merical simulation

摘要： 针对短距/垂直起降(STOVL)飞行器动态起飞过程，采用基于雷诺时均方程的标准 k-ε模型数值模拟 STOVL飞行器气动流场，研究 STOVL飞行器吸附力大小，获得了动态过程吸附力随冲击高度变化曲线，发现升力板下壁面主涡结构的存在和运动影响升力板静压沿程分布。在无量纲冲击高度小于 3时，吸附力曲线斜率增大，吸附作用增加，并对比稳态结果，发现动态过程吸附力要大于稳态过程，在无量纲高度为 1.5时，两者相差26%。流场响应迟滞是造成稳态、动态过程结果差异的原因。

关键词: 短距 /垂直起降；冲击射流；动态过程；升力突降；数值模拟