Over the last four decades, particle image velocimetry (PIV) has evolved into a powerful and
significant measurement technique. The technique has been applied to many areas of fluid …

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

This paper reports on measurements of freestream nitric oxide (NO) rotational and
vibrational temperatures and partial pressures, collected in the Caltech T5 reflected shock …

Chemical and electrical thrusters are generally utilized to control the attitude and orbit of
spacecraft in aerospace. When they are firing, the exhaust expands into the vacuum …

Picosecond laser electronic-excitation tagging (PLEET) was demonstrated in a Mach-6
Ludwieg tube at a repetition rate of 100 kHz using a 1064 nm, 100 ps burst-mode laser. The …

We report on measurements of rotational and vibrational temperature, velocity, and
concentrations of nitric oxide (NO) in freestream flows at the T5 reflected shock tunnel at …

Gaining information of species, temperature, and velocity distributions in turbulent
combustion and high-speed reactive flows is challenging, particularly for conducting …

We report on near-body measurements of temperature and nitric oxide (NO) concentration in
the hypersonic flows around a cylindrical test article in the Caltech T5 reflected shock tunnel …

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

In this work, we present the excitation/emission strategy, experimental setup, and results of
an implementation of krypton tagging velocimetry (KTV). KTV is performed as follows:(i) …