为了测量复杂流动速度分布，基于分子标记示踪原理建立了飞秒激光电子激发标记（FLEET）测量装置。开展了超声速混合流动速度分布测量实验，获得了马赫数3.0射流分别与马赫数2.0，2.5及2.9射流形成的混合流动速度分布的测量结果；结合大涡模拟和纹影实验，显示了混合层的流场结构。利用延迟10 μs的荧光标记线与荧光基线的位移差，分析得出实验中FLEET速度测量的不确定度优于5 m/s；在高低速主流区，FLEET测量的速度结果与计算结果基本一致；在混合层，FLEET实现了较大梯度的速度分布测量，混合层的厚度与纹影实验结果符合较好。实验表明，建设的FLEET装置具有较强的工程实验能力，能够实现超声速混合层等复杂流动速度的分布测量。

The infrared imaging windows of the hyper/supersonic optical dome are encountering severe aero-optical effects (AOEs), so a flow control device, the ramp vortex generator array (RVGA) is proposed based on the ramp vortex generator to inhibit the supersonic mixing layers’ AOE, which is done by the nanotracer-based planar laser scattering technique and ray-tracing method. The experiments prove that under different pressure conditions, RVGA can reduce the mean and standard deviation of the root mean square of the optical path difference (OPDrms) and reduce the supersonic mixing layers’ thickness and mixture a great deal. The AOE of the pressure-matched mixing layer is the weakest. Higher RVGA results in better optical performance. RVGA has the potential to be applied to supersonic film cooling to reduce aero-optical aberrations.