Recent progress in high-speed laser diagnostics for hypersonic flows
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 …
reviewed. Owing to the ultrahigh flow speed, a laser frequency of 100 kHz or higher is …
Focused Laser Differential Interferometry: Recent Developments and Applications for Flow Measurements
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 …
into a powerful tool for the analysis of turbulent dynamics and fluctuations in fluid flows …
Measurement of wall-cooling effects on hypersonic boundary-layer transition using focused laser differential interferometry
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 …
roughness elements has been studied in a quiet Mach 6 wind tunnel using linear array …
Correlated off-body density fluctuations and surface heating in hypersonic boundary layer transition
Measurements of surface heat flux via IR thermography and boundary layer density
fluctuations using a variation of focused laser differential interferometry (FLDI) were …
fluctuations using a variation of focused laser differential interferometry (FLDI) were …
Simultaneous velocity profile and scalar spectra with linear array-focused laser differential interferometry
K Davenport, M Gragston - AIAA Journal, 2023 - arc.aiaa.org
FOCUSED-LASER differential interferometry (FLDI), first dis-cussed by Smeets and George
[1], allows for high-frequency (greater than1 MHz) nonintrusive flow disturbance …
[1], allows for high-frequency (greater than1 MHz) nonintrusive flow disturbance …
Megahertz-rate imaging of hypersonic boundary-layer instabilities in a mach 10 shock tunnel
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 …
Mach 10 flow is measured using several high-speed optical diagnostics capable of time …
Combined experimental and numerical investigation of a hypersonic turbulent boundary layer by means of FLDI and large-eddy simulations
This work investigates a hypersonic turbulent boundary layer over a 7° half angle cone at a
wall-to-total temperature ratio of 0.1, M∞= 7.4 and R e∞ m= 4.2× 10 6 m− 1, in terms of …
wall-to-total temperature ratio of 0.1, M∞= 7.4 and R e∞ m= 4.2× 10 6 m− 1, in terms of …
Effects of surface roughness on shock-wave/turbulent boundary-layer interaction at Mach 4 over a hollow cylinder flare model
Although it is understood that surface roughness can impact boundary layer physics in high-
speed flows, there has been little research aimed at understanding the potential impact of …
speed flows, there has been little research aimed at understanding the potential impact of …
Linear array photodiode and data acquisition system development for multi-point line FLDI measurements
JM Weisberger, BF Bathel, JW Lee… - AIAA Scitech 2022 …, 2022 - arc.aiaa.org
View Video Presentation: https://doi. org/10.2514/6.2022-1796. vid The continuous
development and advancement of multi-point line focused laser differential interferometry …
development and advancement of multi-point line focused laser differential interferometry …
Colinear focused laser differential interferometry and self-aligned focusing schlieren
JM Weisberger, BF Bathel - Applied Optics, 2023 - opg.optica.org
A colinear focused laser differential interferometer (FLDI) and self-aligned focusing schlieren
(SAFS) system has been assembled and tested in the laboratory, using a turbulent jet of …
(SAFS) system has been assembled and tested in the laboratory, using a turbulent jet of …