Optical diagnostics for fluid temperature measurements continue to further our
understanding of flows involving heat transfer and/or chemical reactions, which are intrinsic …

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 …

This manuscript describes the wide variety of optical measurement techniques for
characterizing the flow in hypersonic wind tunnels. The introduction briefly describes …

Picosecond-laser electronic-excitation tagging (PLEET), a seedless picosecond-laser-based
velocimetry technique, is demonstrated in non-reactive flows at a repetition rate of 100 kHz …

In this work, we study the effect of the compression-corner angle on the streamwise turbulent
kinetic energy (sTKE) and structure in Mach 2.8 flow. Krypton tagging velocimetry (KTV) is …

We report the use of femtosecond laser electronic excitation tagging (FLEET) for velocimetry
at a 100-kHz imaging rate. Sequential, single-shot, quantitative velocity profiles of an …

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 characterized for the
first time at high-pressure, low-temperature conditions. FLEET signal intensity and signal …

HIGH-SPEED wind tunnels typically rely on pressure and/or temperature measurement and
nozzle-flow calculations to determine the freestream conditions. This practice can require a …