Abstract

The recent progress in high-speed ($\ge \!{100}\;{\rm kHz}$) laser diagnostics for hypersonic flows is reviewed. Owing to the ultrahigh flow speed, a laser frequency of 100 kHz or higher is required for hypersonic diagnostics. Here, two main laser diagnostic techniques are discussed: focused laser differential interferometry (FLDI) and pulse-burst laser-based diagnostics. Single- and multiple-point FLDI measurements have been widely applied to hypersonic flows for flow velocity and density fluctuation measurements. The progress of pulse-burst laser-based hypersonic diagnostics, including flow velocity measurements and 2D flow visualization, is also discussed.

© 2023 Optica Publishing Group

Mach 18 flow velocimetry with 100-kHz KTV and PLEET in AEDC Tunnel 9

Naibo Jiang, Paul S. Hsu, Stephen W. Grib, Mikhail Slipchenko, David Shekhtman, Nick. J. Parziale, Mike S. Smith, Addison J. Spicer, and Sukesh Roy
Appl. Opt. 62(6) A25-A30 (2023)

High-repetition-rate krypton tagging velocimetry in Mach-6 hypersonic flows

Naibo Jiang, Stephen W. Grib, Paul S. Hsu, Matthew Borg, S. Alexander Schumaker, and Sukesh Roy
Appl. Opt. 61(9) 2192-2197 (2022)

Multi-point line focused laser differential interferometer for high-speed flow fluctuation measurements

Joshua M. Weisberger, Brett F. Bathel, Gregory C. Herring, Gregory M. Buck, Stephen B. Jones, and Angelo A. Cavone
Appl. Opt. 59(35) 11180-11195 (2020)

Quantitative focused laser differential interferometry with hypersonic turbulent boundary layers

Elizabeth K. Benitez, Matthew P. Borg, J. Luke Hill, Matthew T. Aultman, Lian Duan, Carson L. Running, and Joseph S. Jewell
Appl. Opt. 61(31) 9203-9216 (2022)

100 kHz krypton-based flow tagging velocimetry in a high-speed flow

Stephen W. Grib, Naibo Jiang, Paul S. Hsu, Hans U. Stauffer, Josef J. Felver, Sukesh Roy, and S. Alexander Schumaker
Appl. Opt. 60(6) 1615-1622 (2021)