Long-lasting emission from femtosecond excitation of nitrogen-based flows shows promise
as a useful mechanism for a molecular tagging velocimetry instrument. The technique …

Modern “non-intrusive” optical methods are providing revolutionary capabilities for
diagnostics of hypersonic flow fields. They generate accurate information on the …

In this work, 10 kHz molecular tagging velocimetry (MTV) in a M∞= 4 Ludwieg tube is done
using a partial pressure of acetone seeded into the facility driver tube. Despite using air as …

We present results of femtosecond laser electronic excitation tagging (FLEET) velocimetry
applied to a three-dimensional expansion-compression geometry in the Sandia hypersonic …

Nonintrusive velocity measurements using femtosecond laser electronic excitation tagging
(FLEET) were conducted at 1 kHz for both air and nitrogen flows in a Mach 6 Ludwieg tube …

高超声速气流条件下飞行器内/外部流动中存在强湍流及脉动, 边界层转捩, 激波-
边界层干扰和高温真实气体效应等耦合效应, 表征该非定常流动现象对飞行器气动力 …

View Video Presentation: https://doi. org/10.2514/6.2023-0630. vid 10 kHz molecular
tagging velocimetry (MTV) in a M∞= 4 Ludwieg tube is done using a partial pressure of …

高超声速低密度风洞试验对高超声速飞行器的气动特性研究至关重要, 气流速度是其中最受关注
的重要参数之一. 高超声速低密度风洞流场具有流速快和密度低等特点, 给速度测量带来很大 …

A high spatiotemporal resolution technique for instantaneous flow field measurement has
been developed, enabling one-dimensional velocimetry and flow field visualization within a …

A novel, to the best of our knowledge, optical arrangement is evaluated for performing single-
shot femtosecond laser electronic excitation tagging in a 16-point grid (Grid-FLEET) with …