Open Access100-kHz Interferometric Rayleigh Scattering for multi-parameter flow measurements
Author(s) -
Andrew D. Cutler,
Keith D. Rein,
Sukesh Roy,
Paul M. Danehy,
Naibo Jiang
Publication year - 2020
Publication title -
optics express
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.380934
Subject(s) - optics , rayleigh scattering , interferometry , jet (fluid) , nozzle , scattering , physics , forward scatter , turbulence , flow measurement , flow (mathematics) , mechanics , thermodynamics
Simultaneous multi-point multi-parameter flow measurement using Interferometric Rayleigh scattering (IRS) at 100-kHz repetition rate is demonstrated. Using a burst-mode laser and an un-intensified high-speed camera, interferograms are obtained that contain spatial, temporal and scattered light frequency information. The method of analysis of these interferograms to obtain simultaneous multi-point flow velocity and temperature measurements is described. These methods are demonstrated in a 100-kHz-rate study of a choked, under-expanded jet flow discharged by a convergent nozzle. Measurement results and uncertainties are discussed. The 100-kHz IRS technique with un-intensified imaging is applicable in large-scale wind tunnels for the study of unsteady and turbulent flows.