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 …

Focused laser differential interferometry (FLDI), first introduced in the 1970s, has developed
into a powerful tool for the analysis of turbulent dynamics and fluctuations in fluid flows …

In this work, a model of focused laser differential interferometry (FLDI) is derived by
incorporating the local intensity of each beam in an FLDI beam pair. We rederive some …

The boundary layer on a sharp-tip, partially flared, actively cooled cone with discrete
roughness elements has been studied in a quiet Mach 6 wind tunnel using linear array …

Boundary-layer transition, and the increased heating that accompanies it, has a great effect
on how hypersonic vehicles and projectiles are designed. The Mack-mode instability is the …

Measurements of surface heat flux via IR thermography and boundary layer density
fluctuations using a variation of focused laser differential interferometry (FLDI) were …

Krypton Tagging Velocimetry (KTV) and Picosecond Laser Electronic Excitation Tagging
(PLEET) velocimetry at a 100-kHz rate were demonstrated in Mach 18 flow conditions at the …

FOCUSED-LASER differential interferometry (FLDI), first dis-cussed by Smeets and George
[1], allows for high-frequency (greater than1 MHz) nonintrusive flow disturbance …

The transition of the boundary-layer state from laminar to turbulent on a 7° sharp cone in
Mach 10 flow is measured using several high-speed optical diagnostics capable of time …

View Video Presentation: https://doi. org/10.2514/6.2022-1578. vid This study explores the
instability waves occuring at Mach 8 on a slender cone with an axial slice that is followed by …