Achieving the optimum velocity resolution of coherent rayleigh-brillouin scattering

Junhwi Bak, Robert Randolph, Alexandros Gerakis, Mikhail N. Shneider

Research output: Chapter in Book/Report/Conference proceedingConference contribution

3 Scopus citations

Abstract

Single shot coherent Rayleigh-Brillouin scattering (CRBS) is demonstrated to acquire gas flow velocimetry measurements in acquisition times on the order of a few hundred nanoseconds. When applying single-shot CRBS velocimetry in gas flows, it is essential to understand the theoretically best achievable velocity resolution. In single shot CRBS a spectral shift of the order of 10 MHz is translated into a detectable temporal shift of 0.1 nanoseconds. Based on this, we demonstrate here that for typical operating parameters, a velocity resolution as low as 0.5 m·s−1 can be obtained experimentally. By precisely tailoring the chirp rate, a quick adjustment of the velocity resolution of single shot CRBS can be achieved, which can then be tuned accordingly for different experimental conditions.

Original languageEnglish (US)
Title of host publicationAIAA Scitech 2021 Forum
PublisherAmerican Institute of Aeronautics and Astronautics Inc, AIAA
Pages1-7
Number of pages7
ISBN (Print)9781624106095
DOIs
StatePublished - 2021
EventAIAA Science and Technology Forum and Exposition, AIAA SciTech Forum 2021 - Virtual, Online
Duration: Jan 11 2021Jan 15 2021

Publication series

NameAIAA Scitech 2021 Forum

Conference

ConferenceAIAA Science and Technology Forum and Exposition, AIAA SciTech Forum 2021
CityVirtual, Online
Period1/11/211/15/21

All Science Journal Classification (ASJC) codes

  • Aerospace Engineering

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