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

The recent progress in high-speed (≥ 100k H z) laser diagnostics for hypersonic flows is
reviewed. Owing to the ultrahigh flow speed, a laser frequency of 100 kHz or higher is …

In the present work, a non-intrusive diagnostic technique known as molecular tagging
velocimetry was used to collect quantitative freestream velocity measurements in the Mach 7 …

View Video Presentation: https://doi. org/10.2514/6.2023-2438. vid A self-aligned focusing
schlieren (SAFS) apparatus based on a recently published design is implemented for 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 …

Femtosecond laser electronic excitation tagging (FLEET) velocimetry is applied in a
hypersonic boundary layer behind an array of turbulence-inducing trips. One-dimensional …

View Video Presentation: https://doi. org/10.2514/6.2022-1704. vid Laminar, transitional, and
turbulent boundary layers over a variable bluntness ogive-cylinder were measured at 1 kHz …

View Video Presentation: https://doi. org/10.2514/6.2023-0869. vid The reconstruction of
globally-consistent hypersonic boundary layer disturbance modes from experimental …

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 …

The application is explored of a linear photodiode array with femtosecond laser electronic
excitation tagging (FLEET) to determine the streamwise velocity of flow at Mach 8 in the …