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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。
Aiming at the dynamic take-off of STOVL aircraft, the aerodynamic flow field of STOVL aircraft was numerically simulated by standard k-ε model based on Reynolds averaged equation. The adsorption force of STOVL aircraft was studied and the dynamic process of adsorption force with impact It is found that the existence and movement of the main vortex structure on the lower wall of the lift plate affect the distribution of static pressure along the lift plate. When the dimensionless impact height is less than 3, the slope of the adsorption force curve increases and the adsorption effect increases. Comparing the steady-state results, it is found that the dynamic adsorption force is greater than the steady state. At a dimensionless height of 1.5, the difference between them is 26% . The hysteresis of the flow field is the reason of the difference between the steady state and the dynamic process.